nfp_port is a structure which represents an ASIC port, both
PCIe vNIC (on a PF or a VF) or the external MAC port. vNIC
netdev (struct nfp_net) and pure representor netdev (struct
nfp_repr) both have a pointer to this structure. nfp_reprs
always have a port associated. nfp_nets, however, only represent
a device port in legacy mode, where they are considered the
MAC port. In switchdev mode they are just the CPU's side of
the PCIe link.
By definition TC offloads only apply to device ports. Don't
set the flag on vNICs without a port (i.e. in switchdev mode).
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Tested-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Upcoming changes will require all netdevs supporting TC offloads
to have a full struct nfp_port. Require those for BPF offload.
The operation without management FW reporting information about
Ethernet ports is something we only support for very old and very
basic NIC firmwares anyway.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Tested-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jakub Kicinski says:
====================
First patch in this series fixes applying the relocation to immediate
load instructions in the NFP JIT.
The remaining patches come from Quentin. Small addition to libbpf
makes sure it recognizes all standard section names. Makefile in
bpftool/Documentation is improved to explicitly check for rst2man
being installed on the system, otherwise we risk installing empty
files. Man page for bpftool-map is corrected to include program
as a potential value for map of programs.
Last two patches are slightly longer, those update bash completions to
include this release cycle's additions from Roman. Maybe the use of
Fixes tags is slightly frivolous there, but having bash completions
which don't cover all commands and options could be disruptive to work
flow for users.
====================
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Add bash completion for "bpftool cgroup" command family. While at it,
also fix the formatting of some keywords in the man page for cgroups.
Fixes: 5ccda64d38 ("bpftool: implement cgroup bpf operations")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Add bash completion for bpftool command `prog load`. Completion for this
command is easy, as it only takes existing file paths as arguments.
Fixes: 49a086c201 ("bpftool: implement prog load command")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Specify in the documentation that when using bpftool to update a map of
type BPF_MAP_TYPE_PROG_ARRAY, the syntax for the program used as a value
should use the "id|tag|pinned" keywords convention, as used with
"bpftool prog" commands.
Fixes: ff69c21a85 ("tools: bpftool: add documentation")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
If rst2man is not available on the system, running `make doc` from the
bpftool directory fails with an error message. However, it creates empty
manual pages (.8 files in this case). A subsequent call to `make
doc-install` would then succeed and install those empty man pages on the
system.
To prevent this, raise a Makefile error and exit immediately if rst2man
is not available before generating the pages from the rst documentation.
Fixes: ff69c21a85 ("tools: bpftool: add documentation")
Reported-by: Jason van Aaardt <jason.vanaardt@netronome.com>
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
It seems that the type guessing feature for libbpf, based on the name of
the ELF section the program is located in, was inspired from
samples/bpf/prog_load.c, which was not used by any sample for loading
programs of certain types such as TC actions and classifiers, or
LWT-related types. As a consequence, libbpf is not able to guess the
type of such programs and to load them automatically if type is not
provided to the `bpf_load_prog()` function.
Add ELF section names associated to those eBPF program types so that
they can be loaded with e.g. bpftool as well.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Immed relocation is missing a shift which means for larger
offsets the lower and higher part of the address would be
ORed together.
Fixes: ce4ebfd859 ("nfp: bpf: add helpers for updating immediate instructions")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
* acpi-video:
ACPI / video: Use true for boolean value
* acpi-battery:
ACPI / battery: Add quirk for Asus UX360UA and UX410UAK
* acpi-cppc:
ACPI / CPPC: Use 64-bit arithmetic instead of 32-bit
* acpi-tables:
ACPI: SPCR: Make SPCR available to x86
ACPI / tables: Add IORT to injectable table list
* acpi-bus:
ACPI / bus: Parse tables as term_list for Dell XPS 9570 and Precision M5530
ACPI / scan: Use acpi_bus_get_status() to initialize ACPI_TYPE_DEVICE devs
ACPI / bus: Do not call _STA on battery devices with unmet dependencies
PCI: acpiphp_ibm: prepare for acpi_get_object_info() no longer returning status
ACPI: export acpi_bus_get_status_handle()
* acpi-processor:
ACPI / processor: Set default C1 idle state description
ACPI: processor_perflib: Do not send _PPC change notification if not ready
* acpica:
ACPICA: Update version to 20180105
ACPICA: All acpica: Update copyrights to 2018
ACPICA: Add a missing pair of parentheses
ACPICA: Prefer ACPI_TO_POINTER() over ACPI_ADD_PTR()
ACPICA: Avoid NULL pointer arithmetic
ACPICA: Linux: add support for X32 ABI compilation
Commit 0fbc0b67a8 ("cris: remove arch specific early DT functions")
was a bit overzealous in removing the CRIS DT handling,
and the complete contents of the Makefile was erased
instead of just the line for the devicetree file.
This lead to a complete link failure for all SoCs in
the CRIS port due to missing symbols.
Restore the contents except the line for the devicetree file.
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Fixes: 0fbc0b67a8
Commit 82616f9599 ("xen: remove tests for pvh mode in pure pv paths")
removed the check for autotranslation from {set,clear}_foreign_p2m_mapping
but those are called by grant-table.c also on PVH/HVM guests.
Cc: <stable@vger.kernel.org> # 4.14
Fixes: 82616f9599 ("xen: remove tests for pvh mode in pure pv paths")
Signed-off-by: Simon Gaiser <simon@invisiblethingslab.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
* pm-cpufreq:
arm: imx: Add MODULE_ALIAS for cpufreq
cpufreq: Add and use cpufreq_for_each_{valid_,}entry_idx()
cpufreq: intel_pstate: Enable HWP during system resume on CPU0
cpufreq: scpi: fix error return code in scpi_cpufreq_init()
cpufreq: scpi: fix static checker warning cdev isn't an ERR_PTR
cpufreq: remove at32ap-cpufreq
cpufreq: AMD: Ignore the check for ProcFeedback in ST/CZ
cpufreq: Skip cpufreq resume if it's not suspended
* pm-cpuidle:
x86: PM: Make APM idle driver initialize polling state
* pm-domains:
PM / domains: Fix up domain-idle-states OF parsing
Without this, the imx6q-cpufreq driver isn't loaded
automatically when built as a module
Tested on wandboard quad with a fedora 27 kernel rpm
Signed-off-by: Nicolas Chauvet <kwizart@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Pointer subtraction is slow and tedious. Therefore, replace all instances
where cpufreq_for_each_{valid_,}entry loops contained such substractions
with an iteration macro providing an index to the frequency_table entry.
Suggested-by: Al Viro <viro@ZenIV.linux.org.uk>
Link: http://lkml.kernel.org/r/20180120020237.GM13338@ZenIV.linux.org.uk
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
When maxcpus=1 is in the kernel command line, the BP is responsible
for re-enabling the HWP - because currently only the APs invoke
intel_pstate_hwp_enable() during their online process - which might
put the system into unstable state after resume.
Fix this by enabling the HWP explicitly on BP during resume.
Reported-by: Doug Smythies <dsmythies@telus.net>
Suggested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Yu Chen <yu.c.chen@intel.com>
[ rjw: Subject/changelog, minor modifications ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Fix to return a negative error code from the clk_get() error handling
case instead of 0, as done elsewhere in this function.
Fixes: 343a8d17fa (cpufreq: scpi: remove arm_big_little dependency)
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
There's no need to be printing a raw kernel pointer to the kernel log at
every boot. So just remove it, and change the whole message to use the
correct dev_info() call at the same time.
Reported-by: Wang Qize <wang_qize@venustech.com.cn>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The ARCH_WANTS_PROT_NUMA_PROT_NONE symbol was removed by
commit 6a33979d5b ("mm: remove misleading ARCH_USES_NUMA_PROT_NONE"),
but S390 still selects it.
Remove the ARCH_WANTS_PROT_NUMA_PROT_NONE select from the S390 symbol.
Discovered with the
https://github.com/ulfalizer/Kconfiglib/blob/master/examples/list_undefined.py
script.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Commit 76d837a4c0 ("KVM: PPC: Book3S PR: Don't include SPAPR TCE code
on non-pseries platforms") added a reference to the globally undefined
symbol PPC_SERIES. Looking at the rest of the commit, PPC_PSERIES was
probably intended.
Change PPC_SERIES to PPC_PSERIES.
Discovered with the
https://github.com/ulfalizer/Kconfiglib/blob/master/examples/list_undefined.py
script.
Fixes: 76d837a4c0 ("KVM: PPC: Book3S PR: Don't include SPAPR TCE code on non-pseries platforms")
Cc: stable@vger.kernel.org # v4.12+
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
tracepoint tcp_send_reset requires a full socket to work. However, it
may be called when in TCP_TIME_WAIT:
case TCP_TW_RST:
tcp_v6_send_reset(sk, skb);
inet_twsk_deschedule_put(inet_twsk(sk));
goto discard_it;
To avoid this problem, this patch checks the socket with sk_fullsock()
before calling trace_tcp_send_reset().
Fixes: c24b14c46b ("tcp: add tracepoint trace_tcp_send_reset")
Signed-off-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In Kernel 4.15.0+, Netem does not work properly.
Netem setup:
tc qdisc add dev h1-eth0 root handle 1: netem delay 10ms 2ms
Result:
PING 172.16.101.2 (172.16.101.2) 56(84) bytes of data.
64 bytes from 172.16.101.2: icmp_seq=1 ttl=64 time=22.8 ms
64 bytes from 172.16.101.2: icmp_seq=2 ttl=64 time=10.9 ms
64 bytes from 172.16.101.2: icmp_seq=3 ttl=64 time=10.9 ms
64 bytes from 172.16.101.2: icmp_seq=5 ttl=64 time=11.4 ms
64 bytes from 172.16.101.2: icmp_seq=6 ttl=64 time=11.8 ms
64 bytes from 172.16.101.2: icmp_seq=4 ttl=64 time=4303 ms
64 bytes from 172.16.101.2: icmp_seq=10 ttl=64 time=11.2 ms
64 bytes from 172.16.101.2: icmp_seq=11 ttl=64 time=10.3 ms
64 bytes from 172.16.101.2: icmp_seq=7 ttl=64 time=4304 ms
64 bytes from 172.16.101.2: icmp_seq=8 ttl=64 time=4303 ms
Patch:
(rnd % (2 * sigma)) - sigma was overflowing s32. After applying the
patch, I found following output which is desirable.
PING 172.16.101.2 (172.16.101.2) 56(84) bytes of data.
64 bytes from 172.16.101.2: icmp_seq=1 ttl=64 time=21.1 ms
64 bytes from 172.16.101.2: icmp_seq=2 ttl=64 time=8.46 ms
64 bytes from 172.16.101.2: icmp_seq=3 ttl=64 time=9.00 ms
64 bytes from 172.16.101.2: icmp_seq=4 ttl=64 time=11.8 ms
64 bytes from 172.16.101.2: icmp_seq=5 ttl=64 time=8.36 ms
64 bytes from 172.16.101.2: icmp_seq=6 ttl=64 time=11.8 ms
64 bytes from 172.16.101.2: icmp_seq=7 ttl=64 time=8.11 ms
64 bytes from 172.16.101.2: icmp_seq=8 ttl=64 time=10.0 ms
64 bytes from 172.16.101.2: icmp_seq=9 ttl=64 time=11.3 ms
64 bytes from 172.16.101.2: icmp_seq=10 ttl=64 time=11.5 ms
64 bytes from 172.16.101.2: icmp_seq=11 ttl=64 time=10.2 ms
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
It was discovered that simple program which indefinitely sends 200b UDP
packets and runs on TI AM574x SoC (SMP) under RT Kernel triggers network
watchdog timeout in TI CPSW driver (<6 hours run). The network watchdog
timeout is triggered due to race between cpsw_ndo_start_xmit() and
cpsw_tx_handler() [NAPI]
cpsw_ndo_start_xmit()
if (unlikely(!cpdma_check_free_tx_desc(txch))) {
txq = netdev_get_tx_queue(ndev, q_idx);
netif_tx_stop_queue(txq);
^^ as per [1] barier has to be used after set_bit() otherwise new value
might not be visible to other cpus
}
cpsw_tx_handler()
if (unlikely(netif_tx_queue_stopped(txq)))
netif_tx_wake_queue(txq);
and when it happens ndev TX queue became disabled forever while driver's HW
TX queue is empty.
Fix this, by adding smp_mb__after_atomic() after netif_tx_stop_queue()
calls and double check for free TX descriptors after stopping ndev TX queue
- if there are free TX descriptors wake up ndev TX queue.
[1] https://www.kernel.org/doc/html/latest/core-api/atomic_ops.html
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This change will guard against a double free in the case that the
buffers were previously freed at some other time, such as during
a device reset. It resolves a kernel oops that occurred when changing
the VNIC device's MTU.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
At some point, a check was added to exit the polling routine during resets.
This makes sense for most reset conditions, but for a non-fatal error, we
expect the polling routine to continue running to properly clean up the rx
queues. This patch checks if we are performing a non-fatal reset and if we
are, continues normal polling operation.
Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix the number of queues per enabled TC and report available queues
to the kernel without having to limit them to the max RSS limit so
they are available to be mapped for XPS. This allows a queue per
processing thread available for handling traffic for the given
traffic class.
Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Because of differences in how ipv4 and ipv6 handle fib lookups,
verification of nexthops with onlink flag need to default to the main
table rather than the local table used by IPv4. As it stands an
address within a connected route on device 1 can be used with
onlink on device 2. Updating the table properly rejects the route
due to the egress device mismatch.
Update the extack message as well to show it could be a device
mismatch for the nexthop spec.
Fixes: fc1e64e109 ("net/ipv6: Add support for onlink flag")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Verification of nexthops with onlink flag need to handle unreachable
routes. The lookup is only intended to validate the gateway address
is not a local address and if the gateway resolves the egress device
must match the given device. Hence, hitting any default reject route
is ok.
Fixes: fc1e64e109 ("net/ipv6: Add support for onlink flag")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add the appropriate SPDX license tags to the Sun network drivers
as outlined in Documentation/process/license-rules.rst.
Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
AF_RXRPC is incorrectly sending back to the server any abort it receives
for a client connection. This is due to the final-ACK offload to the
connection event processor patch. The abort code is copied into the
last-call information on the connection channel and then the event
processor is set.
Instead, the following should be done:
(1) In the case of a final-ACK for a successful call, the ACK should be
scheduled as before.
(2) In the case of a locally generated ABORT, the ABORT details should be
cached for sending in response to further packets related to that
call and no further action scheduled at call disconnect time.
(3) In the case of an ACK received from the peer, the call should be
considered dead, no ABORT should be transmitted at this time. In
response to further non-ABORT packets from the peer relating to this
call, an RX_USER_ABORT ABORT should be transmitted.
(4) In the case of a call killed due to network error, an RX_USER_ABORT
ABORT should be cached for transmission in response to further
packets, but no ABORT should be sent at this time.
Fixes: 3136ef49a1 ("rxrpc: Delay terminal ACK transmission on a client call")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit baf5086840 ("cxgb4: restructure VF mgmt code") has reordered
some code but an error handling label has not been updated accordingly.
So fix it and free 'adapter' if 't4_wait_dev_ready()' fails.
Fixes: baf5086840 ("cxgb4: restructure VF mgmt code")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
test_kmod.sh reported false failure when module not present.
Check test_bpf.ko is present in the path before loading it.
Two cases to be addressed here,
In the development process of test_bpf.c unit testing will be done by
developers by using "insmod $SRC_TREE/lib/test_bpf.ko"
On the other hand testers run full tests by installing modules on device
under test (DUT) and followed by modprobe to insert the modules accordingly.
Signed-off-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
* for-linus:
block, bfq: add requeue-request hook
bcache: fix for data collapse after re-attaching an attached device
bcache: return attach error when no cache set exist
bcache: set writeback_rate_update_seconds in range [1, 60] seconds
bcache: fix for allocator and register thread race
bcache: set error_limit correctly
bcache: properly set task state in bch_writeback_thread()
bcache: fix high CPU occupancy during journal
bcache: add journal statistic
block: Add should_fail_bio() for bpf error injection
blk-wbt: account flush requests correctly
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Merge tag 'iversion-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux
Pull inode->i_version cleanup from Jeff Layton:
"Goffredo went ahead and sent a patch to rename this function, and
reverse its sense, as we discussed last week.
The patch is very straightforward and I figure it's probably best to
go ahead and merge this to get the API as settled as possible"
* tag 'iversion-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
iversion: Rename make inode_cmp_iversion{+raw} to inode_eq_iversion{+raw}
Pull UDF and ext2 fixlets from Jan Kara:
"A UDF fix and an ext2 cleanup"
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
ext2: drop unneeded newline
udf: Sanitize nanoseconds for time stamps
for new vbt version on CFL and CNL.
GVT contains vGPU reset enhancement, which refines vGPU reset flow
and the support of virtual aperture read/write when x-no-mmap=on
is set in KVM, which is required by a test case from Redhat and
also another fix for virtual OpRegion.
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Merge tag 'drm-intel-next-fixes-2018-02-07' of git://anongit.freedesktop.org/drm/drm-intel into drm-next
Fix for pcode timeouts on BXT and GLK, cmdparser fixes and fixes
for new vbt version on CFL and CNL.
GVT contains vGPU reset enhancement, which refines vGPU reset flow
and the support of virtual aperture read/write when x-no-mmap=on
is set in KVM, which is required by a test case from Redhat and
also another fix for virtual OpRegion.
* tag 'drm-intel-next-fixes-2018-02-07' of git://anongit.freedesktop.org/drm/drm-intel:
drm/i915/bios: add DP max link rate to VBT child device struct
drm/i915/cnp: Properly handle VBT ddc pin out of bounds.
drm/i915/cnp: Ignore VBT request for know invalid DDC pin.
drm/i915/cmdparser: Do not check past the cmd length.
drm/i915/cmdparser: Check reg_table_count before derefencing.
drm/i915/bxt, glk: Increase PCODE timeouts during CDCLK freq changing
drm/i915/gvt: Use KVM r/w to access guest opregion
drm/i915/gvt: Fix aperture read/write emulation when enable x-no-mmap=on
drm/i915/gvt: only reset execlist state of one engine during VM engine reset
drm/i915/gvt: refine intel_vgpu_submission_ops as per engine ops
Commit 'a6a252e64914 ("blk-mq-sched: decide how to handle flush rq via
RQF_FLUSH_SEQ")' makes all non-flush re-prepared requests for a device
be re-inserted into the active I/O scheduler for that device. As a
consequence, I/O schedulers may get the same request inserted again,
even several times, without a finish_request invoked on that request
before each re-insertion.
This fact is the cause of the failure reported in [1]. For an I/O
scheduler, every re-insertion of the same re-prepared request is
equivalent to the insertion of a new request. For schedulers like
mq-deadline or kyber, this fact causes no harm. In contrast, it
confuses a stateful scheduler like BFQ, which keeps state for an I/O
request, until the finish_request hook is invoked on the request. In
particular, BFQ may get stuck, waiting forever for the number of
request dispatches, of the same request, to be balanced by an equal
number of request completions (while there will be one completion for
that request). In this state, BFQ may refuse to serve I/O requests
from other bfq_queues. The hang reported in [1] then follows.
However, the above re-prepared requests undergo a requeue, thus the
requeue_request hook of the active elevator is invoked for these
requests, if set. This commit then addresses the above issue by
properly implementing the hook requeue_request in BFQ.
[1] https://marc.info/?l=linux-block&m=151211117608676
Reported-by: Ivan Kozik <ivan@ludios.org>
Reported-by: Alban Browaeys <alban.browaeys@gmail.com>
Tested-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Serena Ziviani <ziviani.serena@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Testing on mainline after the initial regulator pull request went in
identified a regression for suspend to idle due to it calling the
suspend operations with states that it wasn't realized could happen,
this patch fixes the problem.
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Merge tag 'regulator-fix-v4.16-suspend' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fix from Mark Brown:
"Fix suspend to idle.
Testing on mainline after the initial regulator pull request went in
identified a regression for suspend to idle due to it calling the
suspend operations with states that it wasn't realized could happen,
this patch fixes the problem"
* tag 'regulator-fix-v4.16-suspend' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: Fix suspend to idle
- fix display-timings lookup in the Device Tree in atmel_lcdfb
driver (Johan Hovold)
- fix video mode and line_length to be set correctly in vfb driver
(Pieter "PoroCYon" Sluys)
- fix returning nonsensical values to the user-space on GIO_FONTX
ioctl when using dummy console (Nicolas Pitre)
- add missing license tag to mmpfb driver (Arnd Bergmann)
- convert radeonfb and pxa3xx_gcu drivers to use ktime_get[_ts64]()
instead of the deprecated do_gettimeofday() (Arnd Bergmann)
- switch udlfb driver from using the pr_*() logging functions to
the dev_*() ones + related cleanups (Ladislav Michl)
- use __raw I/O accessors also on arm64 (Ji Zhang)
- fix Kconfig help text for intelfb driver (Randy Dunlap)
- do not duplicate features data in omapfb driver (Ladislav Michl)
- misc cleanups (Colin Ian King, Markus Elfring, Rasmus Villemoes,
Vasyl Gomonovych, Himanshu Jha, Michael Trimarchi)
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Merge tag 'fbdev-v4.16' of git://github.com/bzolnier/linux
Pull fbdev updates from Bartlomiej Zolnierkiewicz:
"There is nothing really major here:
- fix display-timings lookup in the Device Tree in atmel_lcdfb driver
(Johan Hovold)
- fix video mode and line_length to be set correctly in vfb driver
(Pieter "PoroCYon" Sluys)
- fix returning nonsensical values to the user-space on GIO_FONTX
ioctl when using dummy console (Nicolas Pitre)
- add missing license tag to mmpfb driver (Arnd Bergmann)
- convert radeonfb and pxa3xx_gcu drivers to use ktime_get[_ts64]()
instead of the deprecated do_gettimeofday() (Arnd Bergmann)
- switch udlfb driver from using the pr_*() logging functions to the
dev_*() ones + related cleanups (Ladislav Michl)
- use __raw I/O accessors also on arm64 (Ji Zhang)
- fix Kconfig help text for intelfb driver (Randy Dunlap)
- do not duplicate features data in omapfb driver (Ladislav Michl)
- misc cleanups (Colin Ian King, Markus Elfring, Rasmus Villemoes,
Vasyl Gomonovych, Himanshu Jha, Michael Trimarchi)"
* tag 'fbdev-v4.16' of git://github.com/bzolnier/linux: (25 commits)
video: udlfb: Switch from the pr_*() to the dev_*() logging functions
video: udlfb: Constify read only data
video: fbdev/mmp: add MODULE_LICENSE
console/dummy: leave .con_font_get set to NULL
fbdev: mxsfb: use framebuffer_alloc in the correct way
video: udlfb: Do not name private data 'dev'
video: udlfb: Remove noisy warnings
video: udlfb: Remove redundant gdev variable
video: udlfb: Remove unnecessary local variable
fbdev: auo_k190x: Use zeroing memory allocator instead of allocator/memset
vfb: fix video mode and line_length being set when loaded
fbdev: arm64 use __raw I/O memory api
omapfb: dss: Do not duplicate features data
video: fbdev: omap2: Use PTR_ERR_OR_ZERO()
fbdev: au1200fb: delete duplicate header contents
fbdev: pxa3xx: use ktime_get_ts64 for time stamps
fbdev: radeon: use ktime_get() for HZ calibration
video: smscufx: Improve a size determination in two functions
video: udlfb: Delete an unnecessary return statement in two functions
video: udlfb: Improve a size determination in dlfb_alloc_urb_list()
...
DEFINE_SHOW_ATTRIBUTE() macro defined privately in 3 locations is
useful for new and old users to avoid a lot of code duplication.
Move the macro to seq_file.h.
Along with above, clean up 3 drivers to use that macro.
The following is an automated git shortlog grouped by driver:
dell-laptop:
- Re-use DEFINE_SHOW_ATTRIBUTE() macro
ideapad-laptop:
- Re-use DEFINE_SHOW_ATTRIBUTE() macro
samsung-laptop:
- Re-use DEFINE_SHOW_ATTRIBUTE() macro
seq_file:
- Introduce DEFINE_SHOW_ATTRIBUTE() helper macro
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Merge tag 'platform-drivers-x86-v4.16-2' of git://git.infradead.org/linux-platform-drivers-x86
Pull more x86 platform-drivers updates from Andy Shevchenko:
"The DEFINE_SHOW_ATTRIBUTE() macro was defined privately in three
locations and is useful for new and old users to avoid a lot of code
duplication.
Move the macro to seq_file.h.
Along with above, clean up three drivers to use that macro.
This, due to dependencies, was sent separately since affected changes
weren't upstream originally yet. The rationale of doing this now is to
allow use of new macro in v4.17 cycle in a conflictless manner"
* tag 'platform-drivers-x86-v4.16-2' of git://git.infradead.org/linux-platform-drivers-x86:
platform/x86: samsung-laptop: Re-use DEFINE_SHOW_ATTRIBUTE() macro
platform/x86: ideapad-laptop: Re-use DEFINE_SHOW_ATTRIBUTE() macro
platform/x86: dell-laptop: Re-use DEFINE_SHOW_ATTRIBUTE() macro
seq_file: Introduce DEFINE_SHOW_ATTRIBUTE() helper macro
Update VBT defs to reflect revision 216. While at it, default the
expected child device struct size to sizeof the size rather than a
hardcoded value.
v2: Fix bit order (David)
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180118153310.32437-1-jani.nikula@intel.com
(cherry picked from commit c4fb60b9ab)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
With the merge window having been delayed for another week here's
another batch of updates that came in during that week. There's a few
important fixes in here, mainly a fix for I/O on a number of devices
caused by some of the component rework and a fix for a potential issue
if more than one component in a link provides compressed operations.
The I/O fixes are particularly important as the problem causes a power
regression on a number of OMAP platforms.
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Merge tag 'asoc-v4.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound
Pull more ASoC updates from Mark Brown:
"With the merge window having been delayed for another week here's
another batch of updates that came in during that week.
There's a few important fixes in here, mainly a fix for I/O on a
number of devices caused by some of the component rework and a fix for
a potential issue if more than one component in a link provides
compressed operations. The I/O fixes are particularly important as the
problem causes a power regression on a number of OMAP platforms"
* tag 'asoc-v4.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound: (22 commits)
ASoC: stm32: add of dependency for stm32 drivers
ASoC: mt8173-rt5650: fix child-node lookup
ASoC: dapm: fix debugfs read using path->connected
ASoC: compress: Fixup error messages
ASoC: compress: Remove some extraneous blank lines
ASoC: compress: Correct handling of copy callback
ASoC: Intel: kbl: Enable mclk and ssp sclk early
ASoC: Intel: Skylake: Add extended I2S config blob support in Clock driver
ASoC: Intel: Skylake: Add ssp clock driver
ASoC: Fix twl4030 and 6040 regression by adding back read and write
ASoC: sun8i-codec: Add ADC support for a33
ASoC: rockchip: Use dummy_dai for rt5514 dsp dailink
ASoC: soc-pcm: rename .pmdown_time to .use_pmdown_time for Component
ASoC: ak4613: call dummy write for PW_MGMT1/3 when Playback
ASoC: soc-pcm: don't call flush_delayed_work() many times in soc_pcm_private_free()
ASoC: soc-core: snd_soc_rtdcom_lookup() cares component driver name
ASoC: sam9x5_wm8731: Drop 'ASoC' prefix from error messages
ASoC: sam9g20_wm8731: use dev_*() logging functions
ASoC: max98373 Changed SPDX header in C++ comments style
ASoC: dmic: Fix check of return value from read of 'num-channels'
...
A few more misc fixes for 4.16.
* 'drm-next-4.16' of git://people.freedesktop.org/~agd5f/linux:
drm/amdgpu: re-enable CGCG on CZ and disable on ST
drm/amdgpu: disable coarse grain clockgating for ST
drm/radeon: adjust tested variable
drm/amdgpu: remove WARN_ON when VM isn't found v2
drm/amdgpu: fix locking in vega10_ih_prescreen_iv
drm/amdgpu: fix another potential cause of VM faults
drm/amdgpu: use queue 0 for kiq ring
drm/ttm: Fix 'buf' pointer update in ttm_bo_vm_access_kmap() (v2)
drm/ttm: fix missing parameter change for ttm_bo_cleanup_refs
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Merge tag 'linux-watchdog-4.16-rc1' of git://www.linux-watchdog.org/linux-watchdog
Pull watchdog updates from Wim Van Sebroeck:
- new watchdog device drivers for Realtek RTD1295 and Spreadtrum SC9860
platform
- add support for the following devices: jz4780 SoC, AST25xx series SoC
and r8a77970 SoC
- convert to watchdog framework: i6300esb_wdt, xen_wdt and sp5100_tco
- several fixes for watchdog core
- remove at32ap700x and obsolete documentation
- gpio: Convert to use GPIO descriptors
- rename gemini into FTWDT010 as this IP block is generc from Faraday
Technology
- various clean-ups and small bugfixes
- add Guenter Roeck as co-maintainer
- change maintainers e-mail address
* tag 'linux-watchdog-4.16-rc1' of git://www.linux-watchdog.org/linux-watchdog: (74 commits)
documentation: watchdog: remove documentation of w83697hf_wdt/w83697ug_wdt
documentation: watchdog: remove documentation for ixp2000
documentation: watchdog: remove documentation of at32ap700x_wdt
watchdog: remove at32ap700x_wdt
watchdog: sp5100_tco: Add support for recent FCH versions
watchdog: sp5100-tco: Abort if watchdog is disabled by hardware
watchdog: sp5100_tco: Use bit operations
watchdog: sp5100_tco: Convert to use watchdog subsystem
watchdog: sp5100_tco: Clean up function and variable names
watchdog: sp5100_tco: Use dev_ print functions where possible
watchdog: sp5100_tco: Match PCI device early
watchdog: sp5100_tco: Clean up sp5100_tco_setupdevice
watchdog: sp5100_tco: Use standard error codes
watchdog: sp5100_tco: Use request_muxed_region where possible
watchdog: sp5100_tco: Fix watchdog disable bit
watchdog: sp5100_tco: Always use SP5100_IO_PM_{INDEX_REG,DATA_REG}
watchdog: core: make sure the watchdog_worker is not deferred
watchdog: mt7621: switch to using managed devm_watchdog_register_device()
watchdog: mt7621: set WDOG_HW_RUNNING bit when appropriate
watchdog: imx2_wdt: restore previous timeout after suspend+resume
...
