Commit Graph

39866 Commits

Author SHA1 Message Date
Bjorn Helgaas
617b4157a5 Merge branches 'pci/host-exynos', 'pci/host-imx6', 'pci/resource' and 'pci/misc' into next
* pci/host-exynos:
  PCI: exynos: Fix add_pcie_port() section mismatch warning

* pci/host-imx6:
  PCI: imx6: Add support for MSI
  PCI: designware: Make MSI ISR shared IRQ aware
  PCI: imx6: Remove optional (and unused) IRQs
  PCI: imx6: Drop old IRQ mapping
  PCI: imx6: Use new clock names
  PCI: imx6: Fix imx6_add_pcie_port() section mismatch warning

* pci/resource:
  i82875p_edac: Assign PCI resources before adding device

* pci/misc:
  ARM/PCI: Call pcie_bus_configure_settings() to set MPS
  PCI: Make pci_bus_add_device() void

Conflicts:
	drivers/edac/i82875p_edac.c
2014-05-30 11:41:17 -06:00
Yijing Wang
c893d133ea PCI: Make pci_bus_add_device() void
pci_bus_add_device() always returns 0, so there's no point in returning
anything at all.  Make it a void function and remove the tests of the
return value from the callers.

[bhelgaas: changelog, remove unused "err" from i82875p_setup_overfl_dev()]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-30 09:34:27 -06:00
Bjorn Helgaas
fdaf36bd36 Merge branch 'pci/misc' into next
* pci/misc:
  PCI: Fix return value from pci_user_{read,write}_config_*()
  PCI: Turn pcibios_penalize_isa_irq() into a weak function
  PCI: Test for std config alias when testing extended config space
2014-05-28 16:21:25 -06:00
Bjorn Helgaas
d1a2523d2a Merge branches 'pci/hotplug', 'pci/pci_is_bridge' and 'pci/virtualization' into next
* pci/hotplug:
  PCI: cpqphp: Fix possible null pointer dereference
  NVMe: Implement PCIe reset notification callback
  PCI: Notify driver before and after device reset

* pci/pci_is_bridge:
  pcmcia: Use pci_is_bridge() to simplify code
  PCI: pciehp: Use pci_is_bridge() to simplify code
  PCI: acpiphp: Use pci_is_bridge() to simplify code
  PCI: cpcihp: Use pci_is_bridge() to simplify code
  PCI: shpchp: Use pci_is_bridge() to simplify code
  PCI: rpaphp: Use pci_is_bridge() to simplify code
  sparc/PCI: Use pci_is_bridge() to simplify code
  powerpc/PCI: Use pci_is_bridge() to simplify code
  ia64/PCI: Use pci_is_bridge() to simplify code
  x86/PCI: Use pci_is_bridge() to simplify code
  PCI: Use pci_is_bridge() to simplify code
  PCI: Add new pci_is_bridge() interface
  PCI: Rename pci_is_bridge() to pci_has_subordinate()

* pci/virtualization:
  PCI: Introduce new device binding path using pci_dev.driver_override

Conflicts:
	drivers/pci/pci-sysfs.c
2014-05-28 16:21:07 -06:00
Alex Williamson
782a985d7a PCI: Introduce new device binding path using pci_dev.driver_override
The driver_override field allows us to specify the driver for a device
rather than relying on the driver to provide a positive match of the
device.  This shortcuts the existing process of looking up the vendor and
device ID, adding them to the driver new_id, binding the device, then
removing the ID, but it also provides a couple advantages.

First, the above existing process allows the driver to bind to any device
matching the new_id for the window where it's enabled.  This is often not
desired, such as the case of trying to bind a single device to a meta
driver like pci-stub or vfio-pci.  Using driver_override we can do this
deterministically using:

  echo pci-stub > /sys/bus/pci/devices/0000:03:00.0/driver_override
  echo 0000:03:00.0 > /sys/bus/pci/devices/0000:03:00.0/driver/unbind
  echo 0000:03:00.0 > /sys/bus/pci/drivers_probe

Previously we could not invoke drivers_probe after adding a device to
new_id for a driver as we get non-deterministic behavior whether the driver
we intend or the standard driver will claim the device.  Now it becomes a
deterministic process, only the driver matching driver_override will probe
the device.

To return the device to the standard driver, we simply clear the
driver_override and reprobe the device:

  echo > /sys/bus/pci/devices/0000:03:00.0/driver_override
  echo 0000:03:00.0 > /sys/bus/pci/devices/0000:03:00.0/driver/unbind
  echo 0000:03:00.0 > /sys/bus/pci/drivers_probe

Another advantage to this approach is that we can specify a driver override
to force a specific binding or prevent any binding.  For instance when an
IOMMU group is exposed to userspace through VFIO we require that all
devices within that group are owned by VFIO.  However, devices can be
hot-added into an IOMMU group, in which case we want to prevent the device
from binding to any driver (override driver = "none") or perhaps have it
automatically bind to vfio-pci.  With driver_override it's a simple matter
for this field to be set internally when the device is first discovered to
prevent driver matches.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-28 16:04:53 -06:00
Gavin Shan
d97ffe2368 PCI: Fix return value from pci_user_{read,write}_config_*()
The PCI user-space config accessors pci_user_{read,write}_config_*() return
negative error numbers, which were introduced by commit 34e3207205
("PCI: handle positive error codes").  That patch converted all positive
error numbers from platform-specific PCI config accessors to -EINVAL, which
means the callers don't know anything about the specific cause of the
failure.

The patch fixes the issue by converting the positive PCIBIOS_* error values
to generic negative error numbers with pcibios_err_to_errno().

[bhelgaas: changelog]
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Greg Thelen <gthelen@google.com>
2014-05-27 17:10:16 -06:00
Hanjun Guo
a43ae58c84 PCI: Turn pcibios_penalize_isa_irq() into a weak function
pcibios_penalize_isa_irq() is only implemented by x86 now, and legacy ISA
is not used by some architectures.  Make pcibios_penalize_isa_irq() a
__weak function to simplify the code.  This removes the need for new
platforms to add stub implementations of pcibios_penalize_isa_irq().

[bhelgaas: changelog, comments]
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2014-05-27 16:23:58 -06:00
Yijing Wang
1c86438c94 PCI: Add new pci_is_bridge() interface
Add a helper function to check a device's header type for PCI bridge or
CardBus bridge.

Requires: 326c1cdae7 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 12:21:02 -06:00
Keith Busch
3ebe7f9f7e PCI: Notify driver before and after device reset
Notify a PCI device driver when its device's access is about to be disabled
for an impending reset attempt, then after the attempt completes and device
access is restored.  The notification is via the pci_error_handlers
interface.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27 11:11:00 -06:00
Bjorn Helgaas
e5558d1a51 Merge branches 'dma-api', 'pci/virtualization', 'pci/msi', 'pci/misc' and 'pci/resource' into next
* dma-api:
  iommu/exynos: Remove unnecessary "&" from function pointers
  DMA-API: Update dma_pool_create ()and dma_pool_alloc() descriptions
  DMA-API: Fix duplicated word in DMA-API-HOWTO.txt
  DMA-API: Capitalize "CPU" consistently
  sh/PCI: Pass GAPSPCI_DMA_BASE CPU & bus address to dma_declare_coherent_memory()
  DMA-API: Change dma_declare_coherent_memory() CPU address to phys_addr_t
  DMA-API: Clarify physical/bus address distinction

* pci/virtualization:
  PCI: Mark RTL8110SC INTx masking as broken

* pci/msi:
  PCI/MSI: Remove pci_enable_msi_block()

* pci/misc:
  PCI: Remove pcibios_add_platform_entries()
  s390/pci: use pdev->dev.groups for attribute creation
  PCI: Move Open Firmware devspec attribute to PCI common code

* pci/resource:
  PCI: Add resource allocation comments
  PCI: Simplify __pci_assign_resource() coding style
  PCI: Change pbus_size_mem() return values to be more conventional
  PCI: Restrict 64-bit prefetchable bridge windows to 64-bit resources
  PCI: Support BAR sizes up to 8GB
  resources: Clarify sanity check message
  PCI: Don't add disabled subtractive decode bus resources
  PCI: Don't print anything while decoding is disabled
  PCI: Don't set BAR to zero if dma_addr_t is too small
  PCI: Don't convert BAR address to resource if dma_addr_t is too small
  PCI: Reject BAR above 4GB if dma_addr_t is too small
  PCI: Fail safely if we can't handle BARs larger than 4GB
  x86/gart: Tidy messages and add bridge device info
  x86/gart: Replace printk() with pr_info()
  x86/PCI: Move pcibios_assign_resources() annotation to definition
  x86/PCI: Mark ATI SBx00 HPET BAR as IORESOURCE_PCI_FIXED
  x86/PCI: Don't try to move IORESOURCE_PCI_FIXED resources
  x86/PCI: Fix Broadcom CNB20LE unintended sign extension
2014-05-26 17:29:17 -06:00
Sebastian Ott
9edbcd2252 PCI: Remove pcibios_add_platform_entries()
Remove pcibios_add_platform_entries().  Architecture-specific attributes
can be achieved by setting pdev->dev.groups.

Link: https://lkml.kernel.org/r/alpine.LFD.2.11.1404141101500.1529@denkbrett
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-22 10:54:07 -06:00
Bjorn Helgaas
88a984ba07 DMA-API: Change dma_declare_coherent_memory() CPU address to phys_addr_t
dma_declare_coherent_memory() takes two addresses for a region of memory: a
"bus_addr" and a "device_addr".  I think the intent is that "bus_addr" is
the physical address a *CPU* would use to access the region, and
"device_addr" is the bus address the *device* would use to address the
region.

Rename "bus_addr" to "phys_addr" and change its type to phys_addr_t.
Most callers already supply a phys_addr_t for this argument.  The others
supply a 32-bit integer (a constant, unsigned int, or __u32) and need no
change.

Use "unsigned long", not phys_addr_t, to hold PFNs.

No functional change (this could theoretically fix a truncation in a config
with 32-bit dma_addr_t and 64-bit phys_addr_t, but I don't think there are
any such cases involving this code).

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: James Bottomley <jbottomley@Parallels.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
2014-05-20 16:55:23 -06:00
Bjorn Helgaas
77f2ea2f8d DMA-API: Clarify physical/bus address distinction
The DMA-API documentation sometimes refers to "physical addresses" when it
really means "bus addresses."  Sometimes these are identical, but they may
be different if the bridge leading to the bus performs address translation.
Update the documentation to use "bus address" when appropriate.

Also, consistently capitalize "DMA", use parens with function names, use
dev_printk() in examples, and reword a few sections for clarity.

No functional change; documentation changes only.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: James Bottomley <jbottomley@Parallels.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
2014-05-20 16:54:21 -06:00
Alexander Gordeev
034cd97ebd PCI/MSI: Remove pci_enable_msi_block()
There are no users of pci_enable_msi_block() function left.  Obsolete it in
favor of pci_enable_msi_range() and pci_enable_msi_exact() functions.

Previously, we called arch_setup_msi_irqs() once, requesting the same
vector count we passed to arch_msi_check_device().  Now we may call it
several times: if it returns failure, we may retry and request fewer
vectors.

We don't keep track of the vector count we initially passed to
arch_msi_check_device().  We only keep track of the number of vectors
successfully set up by arch_setup_msi_irqs(), and this is what we use to
clean things up when disabling MSI.  Therefore, we assume that
arch_msi_check_device() does nothing that will have to be cleaned up later.

[bhelgaas: changelog]
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-04-30 16:56:47 -06:00
Mark Rustad
c130904096 PCI: Use designated initialization in PCI_VDEVICE
By using designated initialization in PCI_VDEVICE, like other similar
macros, many "missing initializer" warnings that appear when compiling with
W=2 can be silenced.

Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-04-24 17:25:16 -06:00
Jean Delvare
7ee4910ab3 PCI: Remove old serial device IDs
These IDs are no longer referenced since kernel 3.1 so I suppose we can
remove them from pci_ids.h.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-24 15:01:33 -06:00
Linus Torvalds
bf3a340738 Merge branch 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux
Pull slab changes from Pekka Enberg:
 "The biggest change is byte-sized freelist indices which reduces slab
  freelist memory usage:

    https://lkml.org/lkml/2013/12/2/64"

* 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux:
  mm: slab/slub: use page->list consistently instead of page->lru
  mm/slab.c: cleanup outdated comments and unify variables naming
  slab: fix wrongly used macro
  slub: fix high order page allocation problem with __GFP_NOFAIL
  slab: Make allocations with GFP_ZERO slightly more efficient
  slab: make more slab management structure off the slab
  slab: introduce byte sized index for the freelist of a slab
  slab: restrict the number of objects in a slab
  slab: introduce helper functions to get/set free object
  slab: factor out calculate nr objects in cache_estimate
2014-04-13 13:28:13 -07:00
Linus Torvalds
454fd351f2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull yet more networking updates from David Miller:

 1) Various fixes to the new Redpine Signals wireless driver, from
    Fariya Fatima.

 2) L2TP PPP connect code takes PMTU from the wrong socket, fix from
    Dmitry Petukhov.

 3) UFO and TSO packets differ in whether they include the protocol
    header in gso_size, account for that in skb_gso_transport_seglen().
   From Florian Westphal.

 4) If VLAN untagging fails, we double free the SKB in the bridging
    output path.  From Toshiaki Makita.

 5) Several call sites of sk->sk_data_ready() were referencing an SKB
    just added to the socket receive queue in order to calculate the
    second argument via skb->len.  This is dangerous because the moment
    the skb is added to the receive queue it can be consumed in another
    context and freed up.

    It turns out also that none of the sk->sk_data_ready()
    implementations even care about this second argument.

    So just kill it off and thus fix all these use-after-free bugs as a
    side effect.

 6) Fix inverted test in tcp_v6_send_response(), from Lorenzo Colitti.

 7) pktgen needs to do locking properly for LLTX devices, from Daniel
    Borkmann.

 8) xen-netfront driver initializes TX array entries in RX loop :-) From
    Vincenzo Maffione.

 9) After refactoring, some tunnel drivers allow a tunnel to be
    configured on top itself.  Fix from Nicolas Dichtel.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (46 commits)
  vti: don't allow to add the same tunnel twice
  gre: don't allow to add the same tunnel twice
  drivers: net: xen-netfront: fix array initialization bug
  pktgen: be friendly to LLTX devices
  r8152: check RTL8152_UNPLUG
  net: sun4i-emac: add promiscuous support
  net/apne: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
  net: ipv6: Fix oif in TCP SYN+ACK route lookup.
  drivers: net: cpsw: enable interrupts after napi enable and clearing previous interrupts
  drivers: net: cpsw: discard all packets received when interface is down
  net: Fix use after free by removing length arg from sk_data_ready callbacks.
  Drivers: net: hyperv: Address UDP checksum issues
  Drivers: net: hyperv: Negotiate suitable ndis version for offload support
  Drivers: net: hyperv: Allocate memory for all possible per-pecket information
  bridge: Fix double free and memory leak around br_allowed_ingress
  bonding: Remove debug_fs files when module init fails
  i40evf: program RSS LUT correctly
  i40evf: remove open-coded skb_cow_head
  ixgb: remove open-coded skb_cow_head
  igbvf: remove open-coded skb_cow_head
  ...
2014-04-12 17:31:22 -07:00
Linus Torvalds
09c9b61d5d LLVMLinux Patches for v3.15
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Merge tag 'llvmlinux-for-v3.15' of git://git.linuxfoundation.org/llvmlinux/kernel

Pull llvm patches from Behan Webster:
 "These are some initial updates to support compiling the kernel with
  clang.

  These patches have been through the proper reviews to the best of my
  ability, and have been soaking in linux-next for a few weeks.  These
  patches by themselves still do not completely allow clang to be used
  with the kernel code, but lay the foundation for other patches which
  are still under review.

  Several other of the LLVMLinux patches have been already added via
  maintainer trees"

* tag 'llvmlinux-for-v3.15' of git://git.linuxfoundation.org/llvmlinux/kernel:
  x86: LLVMLinux: Fix "incomplete type const struct x86cpu_device_id"
  x86 kbuild: LLVMLinux: More cc-options added for clang
  x86, acpi: LLVMLinux: Remove nested functions from Thinkpad ACPI
  LLVMLinux: Add support for clang to compiler.h and new compiler-clang.h
  LLVMLinux: Remove warning about returning an uninitialized variable
  kbuild: LLVMLinux: Fix LINUX_COMPILER definition script for compilation with clang
  Documentation: LLVMLinux: Update Documentation/dontdiff
  kbuild: LLVMLinux: Adapt warnings for compilation with clang
  kbuild: LLVMLinux: Add Kbuild support for building kernel with Clang
2014-04-12 17:00:40 -07:00
Linus Torvalds
07f5fef981 NTB driver bug fixes to address issues in list traversal, skb leak in
ntb_netdev, a typo, and a leak of msix entries in the error path.
 Clean ups of the event handling logic, as well as a overall style
 cleanup.  Finally, the driver was converted to use the new
 pci_enable_msix_range logic (and the refactoring to go along with it).
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Merge tag 'ntb-3.15' of git://github.com/jonmason/ntb

Pull PCIe non-transparent bridge fixes and features from Jon Mason:
 "NTB driver bug fixes to address issues in list traversal, skb leak in
  ntb_netdev, a typo, and a leak of msix entries in the error path.
  Clean ups of the event handling logic, as well as a overall style
  cleanup.  Finally, the driver was converted to use the new
  pci_enable_msix_range logic (and the refactoring to go along with it)"

* tag 'ntb-3.15' of git://github.com/jonmason/ntb:
  ntb: Use pci_enable_msix_range() instead of pci_enable_msix()
  ntb: Split ntb_setup_msix() into separate BWD/SNB routines
  ntb: Use pci_msix_vec_count() to obtain number of MSI-Xs
  NTB: Code Style Clean-up
  NTB: client event cleanup
  ntb: Fix leakage of ntb_device::msix_entries[] array
  NTB: Fix typo in setting one translation register
  ntb_netdev: Fix skb free issue in open
  ntb_netdev: Fix list_for_each_entry exit issue
2014-04-12 16:16:39 -07:00
Linus Torvalds
5166701b36 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs updates from Al Viro:
 "The first vfs pile, with deep apologies for being very late in this
  window.

  Assorted cleanups and fixes, plus a large preparatory part of iov_iter
  work.  There's a lot more of that, but it'll probably go into the next
  merge window - it *does* shape up nicely, removes a lot of
  boilerplate, gets rid of locking inconsistencie between aio_write and
  splice_write and I hope to get Kent's direct-io rewrite merged into
  the same queue, but some of the stuff after this point is having
  (mostly trivial) conflicts with the things already merged into
  mainline and with some I want more testing.

  This one passes LTP and xfstests without regressions, in addition to
  usual beating.  BTW, readahead02 in ltp syscalls testsuite has started
  giving failures since "mm/readahead.c: fix readahead failure for
  memoryless NUMA nodes and limit readahead pages" - might be a false
  positive, might be a real regression..."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits)
  missing bits of "splice: fix racy pipe->buffers uses"
  cifs: fix the race in cifs_writev()
  ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure
  kill generic_file_buffered_write()
  ocfs2_file_aio_write(): switch to generic_perform_write()
  ceph_aio_write(): switch to generic_perform_write()
  xfs_file_buffered_aio_write(): switch to generic_perform_write()
  export generic_perform_write(), start getting rid of generic_file_buffer_write()
  generic_file_direct_write(): get rid of ppos argument
  btrfs_file_aio_write(): get rid of ppos
  kill the 5th argument of generic_file_buffered_write()
  kill the 4th argument of __generic_file_aio_write()
  lustre: don't open-code kernel_recvmsg()
  ocfs2: don't open-code kernel_recvmsg()
  drbd: don't open-code kernel_recvmsg()
  constify blk_rq_map_user_iov() and friends
  lustre: switch to kernel_sendmsg()
  ocfs2: don't open-code kernel_sendmsg()
  take iov_iter stuff to mm/iov_iter.c
  process_vm_access: tidy up a bit
  ...
2014-04-12 14:49:50 -07:00
Linus Torvalds
0a7418f5f5 This includes the final patch to clean up and fix the issue with the
design of tracepoints and how a user could register a tracepoint
 and have that tracepoint not be activated but no error was shown.
 
 The design was for an out of tree module but broke in tree users.
 The clean up was to remove the saving of the hash table of tracepoint
 names such that they can be enabled before they exist (enabling
 a module tracepoint before that module is loaded). This added more
 complexity than needed. The clean up was to remove that code and
 just enable tracepoints that exist or fail if they do not.
 
 This removed a lot of code as well as the complexity that it brought.
 As a side effect, instead of registering a tracepoint by its name,
 the tracepoint needs to be registered with the tracepoint descriptor.
 This removes having to duplicate the tracepoint names that are
 enabled.
 
 The second patch was added that simplified the way modules were
 searched for.
 
 This cleanup required changes that were in the 3.15 queue as well as
 some changes that were added late in the 3.14-rc cycle. This final
 change waited till the two were merged in upstream and then the
 change was added and full tests were run. Unfortunately, the
 test found some errors, but after it was already submitted to the
 for-next branch and not to be rebased. Sparse errors were detected
 by Fengguang Wu's bot tests, and my internal tests discovered that
 the anonymous union initialization triggered a bug in older gcc compilers.
 Luckily, there was a bugzilla for the gcc bug which gave a work around
 to the problem. The third and fourth patch handled the sparse error
 and the gcc bug respectively.
 
 A final patch was tagged along to fix a missing documentation for
 the README file.
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Merge tag 'trace-3.15-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull more tracing updates from Steven Rostedt:
 "This includes the final patch to clean up and fix the issue with the
  design of tracepoints and how a user could register a tracepoint and
  have that tracepoint not be activated but no error was shown.

  The design was for an out of tree module but broke in tree users.  The
  clean up was to remove the saving of the hash table of tracepoint
  names such that they can be enabled before they exist (enabling a
  module tracepoint before that module is loaded).  This added more
  complexity than needed.  The clean up was to remove that code and just
  enable tracepoints that exist or fail if they do not.

  This removed a lot of code as well as the complexity that it brought.
  As a side effect, instead of registering a tracepoint by its name, the
  tracepoint needs to be registered with the tracepoint descriptor.
  This removes having to duplicate the tracepoint names that are
  enabled.

  The second patch was added that simplified the way modules were
  searched for.

  This cleanup required changes that were in the 3.15 queue as well as
  some changes that were added late in the 3.14-rc cycle.  This final
  change waited till the two were merged in upstream and then the change
  was added and full tests were run.  Unfortunately, the test found some
  errors, but after it was already submitted to the for-next branch and
  not to be rebased.  Sparse errors were detected by Fengguang Wu's bot
  tests, and my internal tests discovered that the anonymous union
  initialization triggered a bug in older gcc compilers.  Luckily, there
  was a bugzilla for the gcc bug which gave a work around to the
  problem.  The third and fourth patch handled the sparse error and the
  gcc bug respectively.

  A final patch was tagged along to fix a missing documentation for the
  README file"

* tag 'trace-3.15-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Add missing function triggers dump and cpudump to README
  tracing: Fix anonymous unions in struct ftrace_event_call
  tracepoint: Fix sparse warnings in tracepoint.c
  tracepoint: Simplify tracepoint module search
  tracepoint: Use struct pointer instead of name hash for reg/unreg tracepoints
2014-04-12 13:06:10 -07:00
Linus Torvalds
0b747172dc Merge git://git.infradead.org/users/eparis/audit
Pull audit updates from Eric Paris.

* git://git.infradead.org/users/eparis/audit: (28 commits)
  AUDIT: make audit_is_compat depend on CONFIG_AUDIT_COMPAT_GENERIC
  audit: renumber AUDIT_FEATURE_CHANGE into the 1300 range
  audit: do not cast audit_rule_data pointers pointlesly
  AUDIT: Allow login in non-init namespaces
  audit: define audit_is_compat in kernel internal header
  kernel: Use RCU_INIT_POINTER(x, NULL) in audit.c
  sched: declare pid_alive as inline
  audit: use uapi/linux/audit.h for AUDIT_ARCH declarations
  syscall_get_arch: remove useless function arguments
  audit: remove stray newline from audit_log_execve_info() audit_panic() call
  audit: remove stray newlines from audit_log_lost messages
  audit: include subject in login records
  audit: remove superfluous new- prefix in AUDIT_LOGIN messages
  audit: allow user processes to log from another PID namespace
  audit: anchor all pid references in the initial pid namespace
  audit: convert PPIDs to the inital PID namespace.
  pid: get pid_t ppid of task in init_pid_ns
  audit: rename the misleading audit_get_context() to audit_take_context()
  audit: Add generic compat syscall support
  audit: Add CONFIG_HAVE_ARCH_AUDITSYSCALL
  ...
2014-04-12 12:38:53 -07:00
Linus Torvalds
3e8072d48b Merge git://git.infradead.org/users/willy/linux-nvme
Pull NVMe driver updates from Matthew Wilcox:
 "Various updates to the NVMe driver.  The most user-visible change is
  that drive hotplugging now works and CPU hotplug while an NVMe drive
  is installed should also work better"

* git://git.infradead.org/users/willy/linux-nvme:
  NVMe: Retry failed commands with non-fatal errors
  NVMe: Add getgeo to block ops
  NVMe: Start-stop nvme_thread during device add-remove.
  NVMe: Make I/O timeout a module parameter
  NVMe: CPU hot plug notification
  NVMe: per-cpu io queues
  NVMe: Replace DEFINE_PCI_DEVICE_TABLE
  NVMe: Fix divide-by-zero in nvme_trans_io_get_num_cmds
  NVMe: IOCTL path RCU protect queue access
  NVMe: RCU protected access to io queues
  NVMe: Initialize device reference count earlier
  NVMe: Add CONFIG_PM_SLEEP to suspend/resume functions
2014-04-11 16:45:59 -07:00
Linus Torvalds
eeb91e4f9d More ACPI and power management fixes and updates for 3.15-rc1
- Fix for a recently introduced CPU hotplug regression in ARM KVM
    from Ming Lei.
 
  - Fixes for breakage in the at32ap, loongson2_cpufreq, and unicore32
    cpufreq drivers introduced during the 3.14 cycle (-stable material)
    from Chen Gang and Viresh Kumar.
 
  - New powernv cpufreq driver from Vaidyanathan Srinivasan, with bits
    from Gautham R Shenoy and Srivatsa S Bhat.
 
  - Exynos cpufreq driver fix preventing it from being included into
    multiplatform builds that aren't supported by it from Sachin Kamat.
 
  - cpufreq cleanups related to the usage of the driver_data field in
    struct cpufreq_frequency_table from Viresh Kumar.
 
  - cpufreq ppc driver cleanup from Sachin Kamat.
 
  - Intel BayTrail support for intel_idle and ACPI idle from Len Brown.
 
  - Intel CPU model 54 (Atom N2000 series) support for intel_idle from
    Jan Kiszka.
 
  - intel_idle fix for Intel Ivy Town residency targets from Len Brown.
 
  - turbostat updates (Intel Broadwell support and output cleanups)
    from Len Brown.
 
  - New cpuidle sysfs attribute for exporting C-states' target residency
    information to user space from Daniel Lezcano.
 
  - New kernel command line argument to prevent power domains enabled
    by the bootloader from being turned off even if they are not in use
    (for diagnostics purposes) from Tushar Behera.
 
  - Fixes for wakeup sysfs attributes documentation from Geert Uytterhoeven.
 
  - New ACPI video blacklist entry for ThinkPad Helix from Stephen Chandler
    Paul.
 
  - Assorted ACPI cleanups and a Kconfig help update from Jonghwan Choi,
    Zhihui Zhang, Hanjun Guo.
 
 /
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Merge tag 'pm+acpi-3.15-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI and power management fixes and updates from Rafael Wysocki:
 "This is PM and ACPI material that has emerged over the last two weeks
  and one fix for a CPU hotplug regression introduced by the recent CPU
  hotplug notifiers registration series.

  Included are intel_idle and turbostat updates from Len Brown (these
  have been in linux-next for quite some time), a new cpufreq driver for
  powernv (that might spend some more time in linux-next, but BenH was
  asking me so nicely to push it for 3.15 that I couldn't resist), some
  cpufreq fixes and cleanups (including fixes for some silly breakage in
  a couple of cpufreq drivers introduced during the 3.14 cycle),
  assorted ACPI cleanups, wakeup framework documentation fixes, a new
  sysfs attribute for cpuidle and a new command line argument for power
  domains diagnostics.

  Specifics:

   - Fix for a recently introduced CPU hotplug regression in ARM KVM
     from Ming Lei.

   - Fixes for breakage in the at32ap, loongson2_cpufreq, and unicore32
     cpufreq drivers introduced during the 3.14 cycle (-stable material)
     from Chen Gang and Viresh Kumar.

   - New powernv cpufreq driver from Vaidyanathan Srinivasan, with bits
     from Gautham R Shenoy and Srivatsa S Bhat.

   - Exynos cpufreq driver fix preventing it from being included into
     multiplatform builds that aren't supported by it from Sachin Kamat.

   - cpufreq cleanups related to the usage of the driver_data field in
     struct cpufreq_frequency_table from Viresh Kumar.

   - cpufreq ppc driver cleanup from Sachin Kamat.

   - Intel BayTrail support for intel_idle and ACPI idle from Len Brown.

   - Intel CPU model 54 (Atom N2000 series) support for intel_idle from
     Jan Kiszka.

   - intel_idle fix for Intel Ivy Town residency targets from Len Brown.

   - turbostat updates (Intel Broadwell support and output cleanups)
     from Len Brown.

   - New cpuidle sysfs attribute for exporting C-states' target
     residency information to user space from Daniel Lezcano.

   - New kernel command line argument to prevent power domains enabled
     by the bootloader from being turned off even if they are not in use
     (for diagnostics purposes) from Tushar Behera.

   - Fixes for wakeup sysfs attributes documentation from Geert
     Uytterhoeven.

   - New ACPI video blacklist entry for ThinkPad Helix from Stephen
     Chandler Paul.

   - Assorted ACPI cleanups and a Kconfig help update from Jonghwan
     Choi, Zhihui Zhang, Hanjun Guo"

* tag 'pm+acpi-3.15-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (28 commits)
  ACPI: Update the ACPI spec information in Kconfig
  arm, kvm: fix double lock on cpu_add_remove_lock
  cpuidle: sysfs: Export target residency information
  cpufreq: ppc: Remove duplicate inclusion of fsl_soc.h
  cpufreq: create another field .flags in cpufreq_frequency_table
  cpufreq: use kzalloc() to allocate memory for cpufreq_frequency_table
  cpufreq: don't print value of .driver_data from core
  cpufreq: ia64: don't set .driver_data to index
  cpufreq: powernv: Select CPUFreq related Kconfig options for powernv
  cpufreq: powernv: Use cpufreq_frequency_table.driver_data to store pstate ids
  cpufreq: powernv: cpufreq driver for powernv platform
  cpufreq: at32ap: don't declare local variable as static
  cpufreq: loongson2_cpufreq: don't declare local variable as static
  cpufreq: unicore32: fix typo issue for 'clk'
  cpufreq: exynos: Disable on multiplatform build
  PM / wakeup: Correct presence vs. emptiness of wakeup_* attributes
  PM / domains: Add pd_ignore_unused to keep power domains enabled
  ACPI / dock: Drop dock_device_ids[] table
  ACPI / video: Favor native backlight interface for ThinkPad Helix
  ACPI / thermal: Fix wrong variable usage in debug statement
  ...
2014-04-11 13:20:04 -07:00
David S. Miller
676d23690f net: Fix use after free by removing length arg from sk_data_ready callbacks.
Several spots in the kernel perform a sequence like:

	skb_queue_tail(&sk->s_receive_queue, skb);
	sk->sk_data_ready(sk, skb->len);

But at the moment we place the SKB onto the socket receive queue it
can be consumed and freed up.  So this skb->len access is potentially
to freed up memory.

Furthermore, the skb->len can be modified by the consumer so it is
possible that the value isn't accurate.

And finally, no actual implementation of this callback actually uses
the length argument.  And since nobody actually cared about it's
value, lots of call sites pass arbitrary values in such as '0' and
even '1'.

So just remove the length argument from the callback, that way there
is no confusion whatsoever and all of these use-after-free cases get
fixed as a side effect.

Based upon a patch by Eric Dumazet and his suggestion to audit this
issue tree-wide.

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-11 16:15:36 -04:00
Dave Hansen
34bf6ef94a mm: slab/slub: use page->list consistently instead of page->lru
'struct page' has two list_head fields: 'lru' and 'list'.  Conveniently,
they are unioned together.  This means that code can use them
interchangably, which gets horribly confusing like with this nugget from
slab.c:

>	list_del(&page->lru);
>	if (page->active == cachep->num)
>		list_add(&page->list, &n->slabs_full);

This patch makes the slab and slub code use page->lru universally instead
of mixing ->list and ->lru.

So, the new rule is: page->lru is what the you use if you want to keep
your page on a list.  Don't like the fact that it's not called ->list?
Too bad.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Christoph Lameter <cl@linux.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
2014-04-11 10:06:06 +03:00
Chris Metcalf
312103d64d AUDIT: make audit_is_compat depend on CONFIG_AUDIT_COMPAT_GENERIC
On systems with CONFIG_COMPAT we introduced the new requirement that
audit_classify_compat_syscall() exists.  This wasn't true for everything
(apparently not for "tilegx", which I know less that nothing about.)

Instead of wrapping the preprocessor optomization with CONFIG_COMPAT we
should have used the new CONFIG_AUDIT_COMPAT_GENERIC.  This patch uses
that config option to make sure only arches which intend to implement
this have the requirement.

This works fine for tilegx according to Chris Metcalf
Signed-off-by: Eric Paris <eparis@redhat.com>
2014-04-10 17:51:29 -04:00
Keith Busch
edd10d3328 NVMe: Retry failed commands with non-fatal errors
For commands returned with failed status, queue these for resubmission
and continue retrying them until success or for a limited amount of
time. The final timeout was arbitrarily chosen so requests can't be
retried indefinitely.

Since these are requeued on the nvmeq that submitted the command, the
callbacks have to take an nvmeq instead of an nvme_dev as a parameter
so that we can use the locked queue to append the iod to retry later.

The nvme_iod conviently can be used to track how long we've been trying
to successfully complete an iod request. The nvme_iod also provides the
nvme prp dma mappings, so I had to move a few things around so we can
keep those mappings.

Signed-off-by: Keith Busch <keith.busch@intel.com>
[fixed checkpatch issue with long line]
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
2014-04-10 17:11:59 -04:00
Keith Busch
b355084a89 NVMe: Make I/O timeout a module parameter
Increase the default timeout to 30 seconds to match SCSI.

Signed-off-by: Keith Busch <keith.busch@intel.com>
[use byte instead of ushort]
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
2014-04-10 17:04:38 -04:00
Keith Busch
33b1e95c90 NVMe: CPU hot plug notification
Registers with hot cpu notification to rebalance, and potentially allocate
additional, io queues.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
2014-04-10 17:03:42 -04:00
Keith Busch
42f614201e NVMe: per-cpu io queues
The device's IO queues are associated with CPUs, so we can use a per-cpu
variable to map the a qid to a cpu. This provides a convienient way
to optimally assign queues to multiple cpus when the device supports
fewer queues than the host has cpus. The previous implementation may
have assigned these poorly in these situations. This patch addresses
this by sharing queues among cpus that are "close" together and should
have a lower lock contention penalty.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
2014-04-10 17:03:15 -04:00
Linus Torvalds
dd76a786af Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block layer fixes from Jens Axboe:
 "A small collection of fixes that should go in before -rc1.  The pull
  request contains:

   - A two patch fix for a regression with block enabled tagging caused
     by a commit in the initial pull request.  One patch is from Martin
     and ensures that SCSI doesn't truncate 64-bit block flags, the
     other one is from me and prevents us from double using struct
     request queuelist for both completion and busy tags.  This caused
     anything from a boot crash for some, to crashes under load.

   - A blk-mq fix for a potential soft stall when hot unplugging CPUs
     with busy IO.

   - percpu_counter fix is listed in here, that caused a suspend issue
     with virtio-blk due to percpu counters having an inconsistent state
     during CPU removal.  Andrew sent this in separately a few days ago,
     but it's here.  JFYI.

   - A few fixes for block integrity from Martin.

   - A ratelimit fix for loop from Mike Galbraith, to avoid spewing too
     much in error cases"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: fix regression with block enabled tagging
  scsi: Make sure cmd_flags are 64-bit
  block: Ensure we only enable integrity metadata for reads and writes
  block: Fix integrity verification
  block: Fix for_each_bvec()
  drivers/block/loop.c: ratelimit error messages
  blk-mq: fix potential stall during CPU unplug with IO pending
  percpu_counter: fix bad counter state during suspend
2014-04-10 09:26:55 -07:00
Linus Torvalds
4162877d3f Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds
Pull LED updates from Bryan Wu:
 "This cycle we got:
   - new driver for leds-mc13783
   - bug fixes
   - code cleanup"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds:
  leds: make sure we unregister a trigger only once
  leds: leds-pwm: properly clean up after probe failure
  leds: clevo-mail: Make probe function __init
  leds-ot200: Fix dependencies
  leds-gpio: of: introduce MODULE_DEVICE_TABLE for module autoloading
  leds: clevo-mail: remove __initdata marker
  leds: leds-ss4200: remove __initdata marker
  leds: blinkm: remove unnecessary spaces
  leds: lp5562: remove unnecessary parentheses
  leds: leds-ss4200: remove DEFINE_PCI_DEVICE_TABLE macro
  leds: leds-s3c24xx: Trivial cleanup in header file
  drivers/leds: delete non-required instances of include <linux/init.h>
  leds: leds-gpio: add retain-state-suspended property
  leds: leds-mc13783: Add devicetree support
  leds: leds-mc13783: Remove unnecessary cleaning of registers on exit
  leds: leds-mc13783: Use proper "max_brightness" value fo LEDs
  leds: leds-mc13783: Use LED core PM functions
  leds: leds-mc13783: Add MC34708 LED support
  leds: Turn off led if blinking is disabled
  ledtrig-cpu: Handle CPU hot(un)plugging
2014-04-10 09:06:10 -07:00
Linus Torvalds
6c61403a44 Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine updates from Vinod Koul:
 - New driver for Qcom bam dma
 - New driver for RCAR peri-peri
 - New driver for FSL eDMA
 - Various odd fixes and updates thru the subsystem

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (29 commits)
  dmaengine: add Qualcomm BAM dma driver
  shdma: add R-Car Audio DMAC peri peri driver
  dmaengine: sirf: enable generic dt binding for dma channels
  dma: omap-dma: Implement device_slave_caps callback
  dmaengine: qcom_bam_dma: Add device tree binding
  dma: dw: Add suspend and resume handling for PCI mode DW_DMAC.
  dma: dw: allocate memory in two stages in probe
  Add new line to test result strings produced in verbose mode
  dmaengine: pch_dma: use tasklet_kill in teardown
  dmaengine: at_hdmac: use tasklet_kill in teardown
  dma: cppi41: start tear down only if channel is busy
  usb: musb: musb_cppi41: Dont reprogram DMA if tear down is initiated
  dmaengine: s3c24xx-dma: make phy->irq signed for error handling
  dma: imx-dma: Add missing module owner field
  dma: imx-dma: Replace printk with dev_*
  dma: fsl-edma: fix static checker warning of NULL dereference
  dma: Remove comment about embedding dma_slave_config into custom structs
  dma: mmp_tdma: move to generic device tree binding
  dma: mmp_pdma: add IRQF_SHARED when request irq
  dma: edma: Fix memory leak in edma_prep_dma_cyclic()
  ...
2014-04-10 08:55:08 -07:00
Jens Axboe
360f92c244 block: fix regression with block enabled tagging
Martin reported that his test system would not boot with
current git, it oopsed with this:

BUG: unable to handle kernel paging request at ffff88046c6c9e80
IP: [<ffffffff812971e0>] blk_queue_start_tag+0x90/0x150
PGD 1ddf067 PUD 1de2067 PMD 47fc7d067 PTE 800000046c6c9060
Oops: 0002 [#1] SMP DEBUG_PAGEALLOC
Modules linked in: sd_mod lpfc(+) scsi_transport_fc scsi_tgt oracleasm
rpcsec_gss_krb5 ipv6 igb dca i2c_algo_bit i2c_core hwmon
CPU: 3 PID: 87 Comm: kworker/u17:1 Not tainted 3.14.0+ #246
Hardware name: Supermicro X9DRX+-F/X9DRX+-F, BIOS 3.00 07/09/2013
Workqueue: events_unbound async_run_entry_fn
task: ffff8802743c2150 ti: ffff880273d02000 task.ti: ffff880273d02000
RIP: 0010:[<ffffffff812971e0>]  [<ffffffff812971e0>]
blk_queue_start_tag+0x90/0x150
RSP: 0018:ffff880273d03a58  EFLAGS: 00010092
RAX: ffff88046c6c9e78 RBX: ffff880077208e78 RCX: 00000000fffc8da6
RDX: 00000000fffc186d RSI: 0000000000000009 RDI: 00000000fffc8d9d
RBP: ffff880273d03a88 R08: 0000000000000001 R09: ffff8800021c2410
R10: 0000000000000005 R11: 0000000000015b30 R12: ffff88046c5bb8a0
R13: ffff88046c5c0890 R14: 000000000000001e R15: 000000000000001e
FS:  0000000000000000(0000) GS:ffff880277b00000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88046c6c9e80 CR3: 00000000018f6000 CR4: 00000000000407e0
Stack:
 ffff880273d03a98 ffff880474b18800 0000000000000000 ffff880474157000
 ffff88046c5c0890 ffff880077208e78 ffff880273d03ae8 ffffffff813b9e62
 ffff880200000010 ffff880474b18968 ffff880474b18848 ffff88046c5c0cd8
Call Trace:
 [<ffffffff813b9e62>] scsi_request_fn+0xf2/0x510
 [<ffffffff81293167>] __blk_run_queue+0x37/0x50
 [<ffffffff8129ac43>] blk_execute_rq_nowait+0xb3/0x130
 [<ffffffff8129ad24>] blk_execute_rq+0x64/0xf0
 [<ffffffff8108d2b0>] ? bit_waitqueue+0xd0/0xd0
 [<ffffffff813bba35>] scsi_execute+0xe5/0x180
 [<ffffffff813bbe4a>] scsi_execute_req_flags+0x9a/0x110
 [<ffffffffa01b1304>] sd_spinup_disk+0x94/0x460 [sd_mod]
 [<ffffffff81160000>] ? __unmap_hugepage_range+0x200/0x2f0
 [<ffffffffa01b2b9a>] sd_revalidate_disk+0xaa/0x3f0 [sd_mod]
 [<ffffffffa01b2fb8>] sd_probe_async+0xd8/0x200 [sd_mod]
 [<ffffffff8107703f>] async_run_entry_fn+0x3f/0x140
 [<ffffffff8106a1c5>] process_one_work+0x175/0x410
 [<ffffffff8106b373>] worker_thread+0x123/0x400
 [<ffffffff8106b250>] ? manage_workers+0x160/0x160
 [<ffffffff8107104e>] kthread+0xce/0xf0
 [<ffffffff81070f80>] ? kthread_freezable_should_stop+0x70/0x70
 [<ffffffff815f0bac>] ret_from_fork+0x7c/0xb0
 [<ffffffff81070f80>] ? kthread_freezable_should_stop+0x70/0x70
Code: 48 0f ab 11 72 db 48 81 4b 40 00 00 10 00 89 83 08 01 00 00 48 89
df 49 8b 04 24 48 89 1c d0 e8 f7 a8 ff ff 49 8b 85 28 05 00 00 <48> 89
58 08 48 89 03 49 8d 85 28 05 00 00 48 89 43 08 49 89 9d
RIP  [<ffffffff812971e0>] blk_queue_start_tag+0x90/0x150
 RSP <ffff880273d03a58>
CR2: ffff88046c6c9e80

Martin bisected and found this to be the problem patch;

	commit 6d113398dc
	Author: Jan Kara <jack@suse.cz>
	Date:   Mon Feb 24 16:39:54 2014 +0100

	    block: Stop abusing rq->csd.list in blk-softirq

and the problem was immediately apparent. The patch states that
it is safe to reuse queuelist at completion time, since it is
no longer used. However, that is not true if a device is using
block enabled tagging. If that is the case, then the queuelist
is reused to keep track of busy tags. If a device also ended
up using softirq completions, we'd reuse ->queuelist for the
IPI handling while block tagging was still using it. Boom.

Fix this by adding a new ipi_list list head, and share the
memory used with the request hash table. The hash table is
never used after the request is moved to the dispatch list,
which happens long before any potential completion of the
request. Add a new request bit for this, so we don't have
cases that check rq->hash while it could potentially have
been reused for the IPI completion.

Reported-by: Martin K. Petersen <martin.petersen@oracle.com>
Tested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
2014-04-09 21:54:06 -06:00
Mathieu Desnoyers
abb43f6998 tracing: Fix anonymous unions in struct ftrace_event_call
gcc <= 4.5.x has significant limitations with respect to initialization
of anonymous unions within structures. They need to be surrounded by
brackets, _and_ they need to be initialized in the same order in which
they appear in the structure declaration.

Link: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10676
Link: http://lkml.kernel.org/r/1397077568-3156-1-git-send-email-mathieu.desnoyers@efficios.com

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-04-09 20:02:55 -04:00
Behan Webster
c4586256f0 x86: LLVMLinux: Fix "incomplete type const struct x86cpu_device_id"
Similar to the fix in 40413dcb7b

MODULE_DEVICE_TABLE(x86cpu, ...) expects the struct to be called struct
x86cpu_device_id, and not struct x86_cpu_id which is what is used in the rest
of the kernel code.  Although gcc seems to ignore this error, clang fails
without this define to fix the name.

Code from drivers/thermal/x86_pkg_temp_thermal.c
static const struct x86_cpu_id __initconst pkg_temp_thermal_ids[] = { ... };
MODULE_DEVICE_TABLE(x86cpu, pkg_temp_thermal_ids);

Error from clang:
drivers/thermal/x86_pkg_temp_thermal.c:577:1: error: variable has
      incomplete type 'const struct x86cpu_device_id'
MODULE_DEVICE_TABLE(x86cpu, pkg_temp_thermal_ids);
^
include/linux/module.h:145:3: note: expanded from macro
      'MODULE_DEVICE_TABLE'
  MODULE_GENERIC_TABLE(type##_device, name)
  ^
include/linux/module.h:87:32: note: expanded from macro
      'MODULE_GENERIC_TABLE'
extern const struct gtype##_id __mod_##gtype##_table            \
                               ^
<scratch space>:143:1: note: expanded from here
__mod_x86cpu_device_table
^
drivers/thermal/x86_pkg_temp_thermal.c:577:1: note: forward declaration of
      'struct x86cpu_device_id'
include/linux/module.h:145:3: note: expanded from macro
      'MODULE_DEVICE_TABLE'
  MODULE_GENERIC_TABLE(type##_device, name)
  ^
include/linux/module.h:87:21: note: expanded from macro
      'MODULE_GENERIC_TABLE'
extern const struct gtype##_id __mod_##gtype##_table            \
                    ^
<scratch space>:141:1: note: expanded from here
x86cpu_device_id
^
1 error generated.

Signed-off-by: Behan Webster <behanw@converseincode.com>
Signed-off-by: Jan-Simon Möller <dl9pf@gmx.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-09 13:44:35 -07:00
Mark Charlebois
565cbdc2fe LLVMLinux: Add support for clang to compiler.h and new compiler-clang.h
Add a compiler-clang.h file to add specific macros needed for compiling the
kernel with clang.

Initially the only override required is the macro for silencing the
compiler for a purposefully uninintialized variable.

Author: Mark Charlebois <charlebm@gmail.com>
Signed-off-by: Mark Charlebois <charlebm@gmail.com>
Signed-off-by: Behan Webster <behanw@converseincode.com>
2014-04-09 13:44:35 -07:00
Linus Torvalds
39de65aa2c Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang:
 "Here is the pull request from the i2c subsystem.  It got a little
  delayed because I needed to wait for a dependency to be included
  (commit b424080a9e: "reset: Add optional resets and stubs").  Plus,
  I had some email problems.  All done now, the highlights are:

   - drivers can now deprecate their use of i2c classes.  That shouldn't
     be used on embedded platforms anyhow and was often blindly
     copy&pasted.  This mechanism gives users time to switch away and
     ultimately boot faster once the use of classes for those drivers is
     gone for good.

   - new drivers for QUP, Cadence, efm32

   - tracepoint support for I2C and SMBus

   - bigger cleanups for the mv64xxx, nomadik, and designware drivers

  And the usual bugfixes, cleanups, feature additions.  Most stuff has
  been in linux-next for a while.  Just some hot fixes and new drivers
  were added a bit more recently."

* 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (63 commits)
  i2c: cadence: fix Kconfig dependency
  i2c: Add driver for Cadence I2C controller
  i2c: cadence: Document device tree bindings
  Documentation: i2c: improve section about flags mangling the protocol
  i2c: qup: use proper type fro clk_freq
  i2c: qup: off by ones in qup_i2c_probe()
  i2c: efm32: fix binding doc
  MAINTAINERS: update I2C web resources
  i2c: qup: New bus driver for the Qualcomm QUP I2C controller
  i2c: qup: Add device tree bindings information
  i2c: i2c-xiic: deprecate class based instantiation
  i2c: i2c-sirf: deprecate class based instantiation
  i2c: i2c-mv64xxx: deprecate class based instantiation
  i2c: i2c-designware-platdrv: deprecate class based instantiation
  i2c: i2c-davinci: deprecate class based instantiation
  i2c: i2c-bcm2835: deprecate class based instantiation
  i2c: mv64xxx: Fix reset controller handling
  i2c: omap: fix usage of IS_ERR_VALUE with pm_runtime_get_sync
  i2c: efm32: new bus driver
  i2c: exynos5: remove unnecessary cast of void pointer
  ...
2014-04-09 08:45:40 -07:00
Linus Torvalds
97e18dc007 MMC highlights for 3.15:
Core:
  - CONFIG_MMC_UNSAFE_RESUME=y is now default behavior.
  - DT bindings for SDHCI UHS, eMMC HS200, high-speed DDR, at 1.8/1.2V.
  - Add GPIO descriptor based slot-gpio card detect API.
 
 Drivers:
  - dw_mmc: Refactor SOCFPGA support as a variant inside dw_mmc-pltfm.c.
  - mmci: Support HW busy detection on ux500.
  - omap: Support MMC_ERASE.
  - omap_hsmmc: Support MMC_PM_KEEP_POWER, MMC_PM_WAKE_SDIO_IRQ, (a)cmd23.
  - rtsx: Support pre-req/post-req async.
  - sdhci: Add support for Realtek RTS5250 controllers.
  - sdhci-acpi: Add support for 80860F16, fix 80860F14/SDIO card detect.
  - sdhci-msm: Add new driver for Qualcomm SDHCI chipset support.
  - sdhci-pxav3: Add support for Marvell Armada 380 and 385 SoCs.
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Merge tag 'mmc-updates-for-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc

Pull MMC updates from Chris Ball:
 "MMC highlights for 3.15:

  Core:
   - CONFIG_MMC_UNSAFE_RESUME=y is now default behavior
   - DT bindings for SDHCI UHS, eMMC HS200, high-speed DDR, at 1.8/1.2V
   - Add GPIO descriptor based slot-gpio card detect API

  Drivers:
   - dw_mmc: Refactor SOCFPGA support as a variant inside dw_mmc-pltfm.c
   - mmci: Support HW busy detection on ux500
   - omap: Support MMC_ERASE
   - omap_hsmmc: Support MMC_PM_KEEP_POWER, MMC_PM_WAKE_SDIO_IRQ, (a)cmd23
   - rtsx: Support pre-req/post-req async
   - sdhci: Add support for Realtek RTS5250 controllers
   - sdhci-acpi: Add support for 80860F16, fix 80860F14/SDIO card detect
   - sdhci-msm: Add new driver for Qualcomm SDHCI chipset support
   - sdhci-pxav3: Add support for Marvell Armada 380 and 385 SoCs"

* tag 'mmc-updates-for-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (102 commits)
  mmc: sdhci-acpi: Intel SDIO has broken card detect
  mmc: sdhci-pxav3: add support for the Armada 38x SDHCI controller
  mmc: sdhci-msm: Add platform_execute_tuning implementation
  mmc: sdhci-msm: Initial support for Qualcomm chipsets
  mmc: sdhci-msm: Qualcomm SDHCI binding documentation
  sdhci: only reprogram retuning timer when flag is set
  mmc: rename ARCH_BCM to ARCH_BCM_MOBILE
  mmc: sdhci: Allow for irq being shared
  mmc: sdhci-acpi: Add device id 80860F16
  mmc: sdhci-acpi: Fix broken card detect for ACPI HID 80860F14
  mmc: slot-gpio: Add GPIO descriptor based CD GPIO API
  mmc: slot-gpio: Split out CD IRQ request into a separate function
  mmc: slot-gpio: Record GPIO descriptors instead of GPIO numbers
  Revert "dts: socfpga: Add support for SD/MMC on the SOCFPGA platform"
  mmc: sdhci-spear: use generic card detection gpio support
  mmc: sdhci-spear: remove support for power gpio
  mmc: sdhci-spear: simplify resource handling
  mmc: sdhci-spear: fix platform_data usage
  mmc: sdhci-spear: fix error handling paths for DT
  mmc: sdhci-bcm-kona: fix build errors when built-in
  ...
2014-04-09 08:39:39 -07:00
Mathieu Desnoyers
b725dfea24 tracepoint: Fix sparse warnings in tracepoint.c
Fix the following sparse warnings:

  CHECK   kernel/tracepoint.c
kernel/tracepoint.c:184:18: warning: incorrect type in assignment (different address spaces)
kernel/tracepoint.c:184:18:    expected struct tracepoint_func *tp_funcs
kernel/tracepoint.c:184:18:    got struct tracepoint_func [noderef] <asn:4>*funcs
kernel/tracepoint.c:216:18: warning: incorrect type in assignment (different address spaces)
kernel/tracepoint.c:216:18:    expected struct tracepoint_func *tp_funcs
kernel/tracepoint.c:216:18:    got struct tracepoint_func [noderef] <asn:4>*funcs
kernel/tracepoint.c:392:24: error: return expression in void function
  CC      kernel/tracepoint.o
kernel/tracepoint.c: In function tracepoint_module_going:
kernel/tracepoint.c:491:6: warning: symbol 'syscall_regfunc' was not declared. Should it be static?
kernel/tracepoint.c:508:6: warning: symbol 'syscall_unregfunc' was not declared. Should it be static?

Link: http://lkml.kernel.org/r/1397049883-28692-1-git-send-email-mathieu.desnoyers@efficios.com

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-04-09 10:12:11 -04:00
Martin K. Petersen
b7aa84d9cb block: Fix for_each_bvec()
Commit 4550dd6c6b introduced for_each_bvec() which iterates over each
bvec attached to a bio or bip. However, the macro fails to check bi_size
before dereferencing which can lead to crashes while counting/mapping
integrity scatterlist segments.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Kent Overstreet <kmo@daterainc.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: <stable@vger.kernel.org> # v3.14+
Signed-off-by: Jens Axboe <axboe@fb.com>
2014-04-09 08:00:01 -06:00
Linus Torvalds
75ff24fa52 Merge branch 'for-3.15' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
 "Highlights:
   - server-side nfs/rdma fixes from Jeff Layton and Tom Tucker
   - xdr fixes (a larger xdr rewrite has been posted but I decided it
     would be better to queue it up for 3.16).
   - miscellaneous fixes and cleanup from all over (thanks especially to
     Kinglong Mee)"

* 'for-3.15' of git://linux-nfs.org/~bfields/linux: (36 commits)
  nfsd4: don't create unnecessary mask acl
  nfsd: revert v2 half of "nfsd: don't return high mode bits"
  nfsd4: fix memory leak in nfsd4_encode_fattr()
  nfsd: check passed socket's net matches NFSd superblock's one
  SUNRPC: Clear xpt_bc_xprt if xs_setup_bc_tcp failed
  NFSD/SUNRPC: Check rpc_xprt out of xs_setup_bc_tcp
  SUNRPC: New helper for creating client with rpc_xprt
  NFSD: Free backchannel xprt in bc_destroy
  NFSD: Clear wcc data between compound ops
  nfsd: Don't return NFS4ERR_STALE_STATEID for NFSv4.1+
  nfsd4: fix nfs4err_resource in 4.1 case
  nfsd4: fix setclientid encode size
  nfsd4: remove redundant check from nfsd4_check_resp_size
  nfsd4: use more generous NFS4_ACL_MAX
  nfsd4: minor nfsd4_replay_cache_entry cleanup
  nfsd4: nfsd4_replay_cache_entry should be static
  nfsd4: update comments with obsolete function name
  rpc: Allow xdr_buf_subsegment to operate in-place
  NFSD: Using free_conn free connection
  SUNRPC: fix memory leak of peer addresses in XPRT
  ...
2014-04-08 18:28:14 -07:00
Steven Rostedt (Red Hat)
eb7d035c59 tracepoint: Simplify tracepoint module search
Instead of copying the num_tracepoints and tracepoints_ptrs from
the module structure to the tp_mod structure, which only uses it to
find the module associated to tracepoints of modules that are coming
and going, simply copy the pointer to the module struct to the tracepoint
tp_module structure.

Also removed un-needed brackets around an if statement.

Link: http://lkml.kernel.org/r/20140408201705.4dad2c4a@gandalf.local.home

Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-04-08 20:45:34 -04:00
Mathieu Desnoyers
de7b297390 tracepoint: Use struct pointer instead of name hash for reg/unreg tracepoints
Register/unregister tracepoint probes with struct tracepoint pointer
rather than tracepoint name.

This change, which vastly simplifies tracepoint.c, has been proposed by
Steven Rostedt. It also removes 8.8kB (mostly of text) to the vmlinux
size.

From this point on, the tracers need to pass a struct tracepoint pointer
to probe register/unregister. A probe can now only be connected to a
tracepoint that exists. Moreover, tracers are responsible for
unregistering the probe before the module containing its associated
tracepoint is unloaded.

   text    data     bss     dec     hex filename
10443444        4282528 10391552        25117524        17f4354 vmlinux.orig
10434930        4282848 10391552        25109330        17f2352 vmlinux

Link: http://lkml.kernel.org/r/1396992381-23785-2-git-send-email-mathieu.desnoyers@efficios.com

CC: Ingo Molnar <mingo@kernel.org>
CC: Frederic Weisbecker <fweisbec@gmail.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Frank Ch. Eigler <fche@redhat.com>
CC: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
[ SDR - fixed return val in void func in tracepoint_module_going() ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-04-08 20:43:28 -04:00
Linus Torvalds
ce7613db2d Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull more networking updates from David Miller:

 1) If a VXLAN interface is created with no groups, we can crash on
    reception of packets.  Fix from Mike Rapoport.

 2) Missing includes in CPTS driver, from Alexei Starovoitov.

 3) Fix string validations in isdnloop driver, from YOSHIFUJI Hideaki
    and Dan Carpenter.

 4) Missing irq.h include in bnxw2x, enic, and qlcnic drivers.  From
    Josh Boyer.

 5) AF_PACKET transmit doesn't statistically count TX drops, from Daniel
    Borkmann.

 6) Byte-Queue-Limit enabled drivers aren't handled properly in
    AF_PACKET transmit path, also from Daniel Borkmann.

    Same problem exists in pktgen, and Daniel fixed it there too.

 7) Fix resource leaks in driver probe error paths of new sxgbe driver,
    from Francois Romieu.

 8) Truesize of SKBs can gradually get more and more corrupted in NAPI
    packet recycling path, fix from Eric Dumazet.

 9) Fix uniprocessor netfilter build, from Florian Westphal.  In the
    longer term we should perhaps try to find a way for ARRAY_SIZE() to
    work even with zero sized array elements.

10) Fix crash in netfilter conntrack extensions due to mis-estimation of
    required extension space.  From Andrey Vagin.

11) Since we commit table rule updates before trying to copy the
    counters back to userspace (it's the last action we perform), we
    really can't signal the user copy with an error as we are beyond the
    point from which we can unwind everything.  This causes all kinds of
    use after free crashes and other mysterious behavior.

    From Thomas Graf.

12) Restore previous behvaior of div/mod by zero in BPF filter
    processing.  From Daniel Borkmann.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (38 commits)
  net: sctp: wake up all assocs if sndbuf policy is per socket
  isdnloop: several buffer overflows
  netdev: remove potentially harmful checks
  pktgen: fix xmit test for BQL enabled devices
  net/at91_ether: avoid NULL pointer dereference
  tipc: Let tipc_release() return 0
  at86rf230: fix MAX_CSMA_RETRIES parameter
  mac802154: fix duplicate #include headers
  sxgbe: fix duplicate #include headers
  net: filter: be more defensive on div/mod by X==0
  netfilter: Can't fail and free after table replacement
  xen-netback: Trivial format string fix
  net: bcmgenet: Remove unnecessary version.h inclusion
  net: smc911x: Remove unused local variable
  bonding: Inactive slaves should keep inactive flag's value
  netfilter: nf_tables: fix wrong format in request_module()
  netfilter: nf_tables: set names cannot be larger than 15 bytes
  netfilter: nf_conntrack: reserve two bytes for nf_ct_ext->len
  netfilter: Add {ipt,ip6t}_osf aliases for xt_osf
  netfilter: x_tables: allow to use cgroup match for LOCAL_IN nf hooks
  ...
2014-04-08 12:41:23 -07:00
Linus Torvalds
e9f37d3a8d Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm updates from Dave Airlie:
 "Highlights:

   - drm:

     Generic display port aux features, primary plane support, drm
     master management fixes, logging cleanups, enforced locking checks
     (instead of docs), documentation improvements, minor number
     handling cleanup, pseudofs for shared inodes.

   - ttm:

     add ability to allocate from both ends

   - i915:

     broadwell features, power domain and runtime pm, per-process
     address space infrastructure (not enabled)

   - msm:

     power management, hdmi audio support

   - nouveau:

     ongoing GPU fault recovery, initial maxwell support, random fixes

   - exynos:

     refactored driver to clean up a lot of abstraction, DP support
     moved into drm, LVDS bridge support added, parallel panel support

   - gma500:

     SGX MMU support, SGX irq handling, asle irq work fixes

   - radeon:

     video engine bringup, ring handling fixes, use dp aux helpers

   - vmwgfx:

     add rendernode support"

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (849 commits)
  DRM: armada: fix corruption while loading cursors
  drm/dp_helper: don't return EPROTO for defers (v2)
  drm/bridge: export ptn3460_init function
  drm/exynos: remove MODULE_DEVICE_TABLE definitions
  ARM: dts: exynos4412-trats2: enable exynos/fimd node
  ARM: dts: exynos4210-trats: enable exynos/fimd node
  ARM: dts: exynos4412-trats2: add panel node
  ARM: dts: exynos4210-trats: add panel node
  ARM: dts: exynos4: add MIPI DSI Master node
  drm/panel: add S6E8AA0 driver
  ARM: dts: exynos4210-universal_c210: add proper panel node
  drm/panel: add ld9040 driver
  panel/ld9040: add DT bindings
  panel/s6e8aa0: add DT bindings
  drm/exynos: add DSIM driver
  exynos/dsim: add DT bindings
  drm/exynos: disallow fbdev initialization if no device is connected
  drm/mipi_dsi: create dsi devices only for nodes with reg property
  drm/mipi_dsi: add flags to DSI messages
  Skip intel_crt_init for Dell XPS 8700
  ...
2014-04-08 09:52:16 -07:00
Heiko Carstens
5fb6b953bb include/linux/syscalls.h: add sys_renameat2() prototype
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-08 09:24:25 -07:00
Rafael J. Wysocki
fe10739284 Merge branch 'pm-cpufreq'
* pm-cpufreq:
  cpufreq: ppc: Remove duplicate inclusion of fsl_soc.h
  cpufreq: create another field .flags in cpufreq_frequency_table
  cpufreq: use kzalloc() to allocate memory for cpufreq_frequency_table
  cpufreq: don't print value of .driver_data from core
  cpufreq: ia64: don't set .driver_data to index
  cpufreq: powernv: Select CPUFreq related Kconfig options for powernv
  cpufreq: powernv: Use cpufreq_frequency_table.driver_data to store pstate ids
  cpufreq: powernv: cpufreq driver for powernv platform
  cpufreq: at32ap: don't declare local variable as static
  cpufreq: loongson2_cpufreq: don't declare local variable as static
  cpufreq: unicore32: fix typo issue for 'clk'
  cpufreq: exynos: Disable on multiplatform build
2014-04-08 13:28:02 +02:00