Hardware performance counters on ARM are 32-bits wide but atomic64_t
variables are used to represent counter data in the hw_perf_event structure.
The armpmu_event_update function right-shifts a signed 64-bit delta variable
and adds the result to the event count. This can lead to shifting in sign-bits
if the MSB of the 32-bit counter value is set. This results in perf output
such as:
Performance counter stats for 'sleep 20':
18446744073460670464 cycles <-- 0xFFFFFFFFF12A6000
7783773 instructions # 0.000 IPC
465 context-switches
161 page-faults
1172393 branches
20.154242147 seconds time elapsed
This patch ensures that the delta value is treated as unsigned so that the
right shift sets the upper bits to zero.
Cc: <stable@kernel.org>
Acked-by: Jamie Iles <jamie.iles@picochip.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
RealView boards with certain revisions of the L210/L220 cache controller
may have issues (hardware deadlock) with the mandatory barriers (DSB
followed by an L2 cache sync) when ARM_DMA_MEM_BUFFERABLE is enabled.
The patch disables ARM_DMA_MEM_BUFFERABLE for these boards.
Tested-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
RealView boards with certain revisions of the L220 cache controller (ARM11*
processors only) may have issues (hardware deadlock) with the recent changes to
the mb() barrier implementation (DSB followed by an L2 cache sync). The patch
redefines the RealView ARM11MPCore mandatory barriers without the outer_sync()
call.
Cc: <stable@kernel.org>
Tested-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
CPU performance event counters on v7 cores will only operate
if either the NIDEN or DBGEN signals are driven high.
For the OMAP3 platform, these signals are driven low by default
but DBGEN can be asserted by selecting the OMAP3_EMU Kconfig option,
which enables the virtual clock for hardware debugging peripherals.
Acked-by: Jean Pihet <jpihet@mvista.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Linux expects that if a CPU modifies a memory location, then that
modification will eventually become visible to other CPUs in the system.
On an ARM11MPCore processor, loads are prioritised over stores so it is
possible for a store operation to be postponed if a polling loop immediately
follows it. If the variable being polled indirectly depends on the outstanding
store [for example, another CPU may be polling the variable that is pending
modification] then there is the potential for deadlock if interrupts are
disabled. This deadlock occurs in the KGDB testsuire when executing on an
SMP ARM11MPCore configuration.
This patch changes the definition of cpu_relax() to smp_mb() for ARMv6 cores,
forcing a flushing of the write buffer on SMP systems before the next load
takes place. If the Kernel is not compiled for SMP support, this will expand
to a barrier() as before.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
When not aligned, random bits could be written in the initial page table
by the __create_page_tables() function.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
When not aligned, random bits could be written in the initial page table
by the __create_page_tables() function.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Commit f4d6477f introduced a workaround for the lack of hardware
broadcasting of the cache maintenance operations on ARM11MPCore.
However, the workaround is only valid on CPUs that do not do speculative
loads into the D-cache.
This patch adds a Kconfig option with the corresponding help to make the
above clear. When the DMA_CACHE_RWFO option is disabled, the kernel
behaviour is that prior to the f4d6477f commit. This also allows ARMv6
UP processors with speculative loads to work correctly.
For other processors, a different workaround may be needed.
Cc: Ronen Shitrit <rshitrit@marvell.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
A recent patch for DMA cache maintenance on ARM11MPCore added a write
for ownership trick to the v6_dma_inv_range() function. Such operation
destroys data already present in the buffer. However, this function is
used with with dma_sync_single_for_device() which is supposed to
preserve the existing data transfered into the buffer. This patch adds a
combination of read/write for ownership to preserve the original data.
Reported-by: Ronen Shitrit <rshitrit@marvell.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This macro is not defined when !CONFIG_MMU so this patch moves the
CONSISTENT_* definitions to the CONFIG_MMU section.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (22 commits)
USB: gadget: f_mass_storage: stale common->fsg value bug fix
USB: gadget: f_mass_storage: fixed fs descriptors not being updated
USB: musb: Enable the maximum supported burst mode for DMA
USB: musb: fix Blackfin ulpi stubs
USB: MUSB: make non-OMAP platforms build with CONFIG_PM=y
USB: musb_core: make disconnect and suspend interrupts work again
USB: obey the sysfs power/wakeup setting
USB: gadget eth: Fix calculate CRC32 in EEM
USB: qcserial: fix a memory leak in qcprobe error path
USB: gadget/printer, fix sleep inside atomic
USB: isp1362-hcd, fix double lock
USB: serial: ftdi: correct merge conflict with CONTEC id
USB: fix oops in usb_sg_init()
USB: s3c2410: deactivate endpoints before gadget unbinding
USB: ehci-mxc: bail out on transceiver problems
USB: otg/ulpi: bail out on read errors
usb: musb: Fix a bug by making suspend interrupt available in device mode
USB: r8a66597: Fix failure in change of status
USB: xHCI: Fix bug in link TRB activation change.
USB: gadget: g_fs: possible invalid pointer reference bug fixed
...
As discussed with Mike Reed, add him as the maintainer of the qla1280
driver as I no longer have any hardware and he is actively looking
after it.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
futex_find_get_task is currently used (through lookup_pi_state) from two
contexts, futex_requeue and futex_lock_pi_atomic. None of the paths
looks it needs the credentials check, though. Different (e)uids
shouldn't matter at all because the only thing that is important for
shared futex is the accessibility of the shared memory.
The credentail check results in glibc assert failure or process hang (if
glibc is compiled without assert support) for shared robust pthread
mutex with priority inheritance if a process tries to lock already held
lock owned by a process with a different euid:
pthread_mutex_lock.c:312: __pthread_mutex_lock_full: Assertion `(-(e)) != 3 || !robust' failed.
The problem is that futex_lock_pi_atomic which is called when we try to
lock already held lock checks the current holder (tid is stored in the
futex value) to get the PI state. It uses lookup_pi_state which in turn
gets task struct from futex_find_get_task. ESRCH is returned either
when the task is not found or if credentials check fails.
futex_lock_pi_atomic simply returns if it gets ESRCH. glibc code,
however, doesn't expect that robust lock returns with ESRCH because it
should get either success or owner died.
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Darren Hart <dvhltc@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add another device ID as listed in the vendor driver version
0003.0825.2009.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
There are only 6 elements in the cb_pcidda_boards[] array so the
original code read past the end. After this change nothing uses N_BOARDS
so I removed the definition.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch adds some device ids.
The list of supported devices was extracted from realteks driver package.
(0x050d, 0x815F) and (0x0df6, 0x004b) are not in the official list of
supported devices and may not work correctly.
In case of problems with these, they should probably be removed from the list.
Signed-off-by: Florian Schilhabel <florian.c.schilhabel@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
In commit bbfb5652, the spacing in the definitions of eqMacAddr and cpMacAddr
in drivers/staging/rtl8187se/r8180_core.c were changed to conform to kernel
standards. These definitions were duplicates of lines found in
drivers/staging/rtl8187se/ieee80211/dot11d.h. Once the change was made, the
following warnings were emitted:
CC [M] drivers/staging/rtl8187se/r8180_core.o
drivers/staging/rtl8187se/r8180_core.c:69:0: warning: "eqMacAddr" redefined
drivers/staging/rtl8187se/ieee80211/dot11d.h:39:0: note: this is the location of the previous definition
drivers/staging/rtl8187se/r8180_core.c:70:0: warning: "cpMacAddr" redefined
drivers/staging/rtl8187se/ieee80211/dot11d.h:40:0: note: this is the location of the previous definition
The fix is to keep only the difinition in the header file.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
I got a wlags49_h2 driver build error in linux-next when CONFIG_SYSFS is not set.
CC [M] drivers/staging/wlags49_h2/wl_cs.o
In file included from drivers/staging/wlags49_h2/wl_cs.c:104:
drivers/staging/wlags49_h2/wl_sysfs.h: In function ‘register_wlags_sysfs’:
drivers/staging/wlags49_h2/wl_sysfs.h:5: error: parameter name omitted
drivers/staging/wlags49_h2/wl_sysfs.h: In function ‘unregister_wlags_sysfs’:
drivers/staging/wlags49_h2/wl_sysfs.h:6: error: parameter name omitted
make[1]: *** [drivers/staging/wlags49_h2/wl_cs.o] Error 1
make: *** [_module_drivers/staging/wlags49_h2] Error 2
This is due a wrong function definition (it does not include parameters names).
Signed-off-by: Javier Martinez Canillas <martinez.javier@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
On ia64, the build fails with incompatible implicit definition of strlen.
This patch adds the <linux/string.h> include to get the real prototype.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
There is a possible race condition when hv_utils starts to load immediately
after hv_vmbus is loading - null pointer error could happen.
This patch added wait/completion to ensure all channels are ready before
vmbus loading completes. So another module won't have any uninitialized channel.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
I received a report that AI streaming acquisitions do not work properly
for the adl_pci9111 driver when convert_src is TRIG_TIMER and
scan_begin_src is TRIG_FOLLOW (and scan_begin_arg is therefore 0). This
seems to be down to the incorrect setting of dev_private->scan_delay in
pci9111_ai_do_cmd(). Under the previously stated conditions,
dev_private->scan_delay ends up set to (unsigned int)-1, but it ought to
be set to 0. The function sets it to 0 initially, and it only makes
sense to change it if both convert_src and scan_begin_src are set to
TRIG_TIMER.
Note: 'scan_delay' is the number of unwanted scans to discard after each
valid scan. The hardware does not support 'scan' timing as such, just a
regularly paced conversion timer (with automatic channel switching
between conversions). The driver simulates a scan period that is some
(>1) multiple of the conversion period times the scan length
(chanlist_len samples) by reading chanlist_len samples and discarding
the next scan_delay times chanlist_len samples.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
I moved the kfree() down a couple lines after the dereference.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
In today linux-next I got a compile warning in staging/batman-adv.
This is due a struct bin_attribute read function prototype change and the driver was not updated.
This patch solves the issue
Signed-off-by: Javier Martinez Canillas <martinez.javier@gmail.com>
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
copy_to_user() returns the number of bites remaining but we want to
return a negative error code here.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
On fsg_unbind the common->fsg pointer was not NULLed if the
unbound fsg_dev instance was the current one. As an effect,
the incorrect pointer was preserved in all further operations
which caused do_set_interface to reference an invalid region.
This commit fixes this by raising an exception in fsg_bind
which will change the common->fsg pointer. This also requires
an wait queue so that the thread in fsg_bind can wait till the
worker thread handles the exception.
This commit removes also a config and new_config fields of
fsg_common as they are no longer needed since fsg can be
used to determine whether function is active or not.
Moreover, this commit removes possible race condition where
the fsg field was modified in both the worker thread and
form various other contexts. This is fixed by replacing
prev_fsg with new_fsg. At this point, fsg is assigned only
in worker thread.
Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The full speed descriptors were copied to the usb_function structure
in the fsg_bind_config function before call to the usb_ep_autoconfig.
The usb_ep_autoconfig was called in fsg_bind using the original
descriptors. In effect copied descriptors were not updated.
This patch changes the copy full speed descriptors after the call to
usb_op_autoconfig is performed. This way, copied full speed
descriptors have updated values.
Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Reported-by: Dries Van Puymbroeck <Dries.VanPuymbroeck@dekimo.com>
Tested-by: Dries Van Puymbroeck <Dries.VanPuymbroeck@dekimo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Setting MUSB Burst Mode 3 automatically enables support for
lower burst modes (BURST4, BURST8, BURST16 or bursts of unspecified
length). There is no need to set these burst modes based on the
packet size. Also enable the burst mode for both mode1 and mode0.
This is a fix for buggy hardware - having the lower burst modes
enabled can potentially cause lockups of the DMA engine used in
OMAP2/3/4 chips.
Signed-off-by: Hema HK <hemahk@ti.com>
Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The new ulpi code defines fallback stubs for the Blackfin arch, but does
so incorrectly leading to a build failure:
drivers/usb/musb/musb_core.c:227: error: 'musb_ulpi_read' undeclared here (not in a function)
drivers/usb/musb/musb_core.c:228: error: 'musb_ulpi_write' undeclared here (not in a function)
Tweak the fallback stubs so that they do work as intended.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Attempt to build MUSB driver with CONFIG_PM=y (e.g. in the OTG mode) on DaVinci
results in these link errors:
drivers/built-in.o: In function `musb_restore_context':
led-triggers.c:(.text+0x714d8): undefined reference to
`musb_platform_restore_context'
drivers/built-in.o: In function `musb_save_context':
led-triggers.c:(.text+0x71788): undefined reference to
`musb_platform_save_context'
This turned out to be caused by commit 9957dd97ec
(usb: musb: Fix compile error for omaps for musb_hdrc). Revert it, taking into
account the rename of CONFIG_ARCH_OMAP34XX into CONFIG_ARCH_OMAP3 (which that
commit fixed in a completely inappropriate way) and the recent addition of
OMAP4 support.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Commit 1c25fda4a0 (usb: musb: handle irqs in the
order dictated by programming guide) forgot to get rid of the old 'STAGE0_MASK'
filter for calling musb_stage0_irq(), so now disconnect and suspend interrupts
are effectively ignored...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as1403) is a partial reversion of an earlier change
(commit 5f677f1d45 "USB: fix remote
wakeup settings during system sleep"). After hearing from a user, I
realized that remote wakeup should be enabled during system sleep
whenever userspace allows it, and not only if a driver requests it
too.
Indeed, there could be a device with no driver, that does nothing but
generate a wakeup request when the user presses a button. Such a
device should be allowed to do its job.
The problem fixed by the earlier patch -- device generating a wakeup
request for no reason, causing system suspend to abort -- was also
addressed by a later patch ("USB: don't enable remote wakeup by
default", accepted but not yet merged into mainline). The device
won't be able to generate the bogus wakeup requests because it will be
disabled for remote wakeup by default. Hence this reversion will not
re-introduce any old problems.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org> [.34]
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
CRC should be calculated for Ethernet frame, not for whole recievede EEM data.
This bug shows rarely, because in many times len == skb->len.
Signed-off-by: Jiri Pinkava <jiri.pinkava@vscht.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch adds missing kfree(data) before return -ENODEV.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Stanse found that sleep is called inside atomic context created by
lock_printer_io spinlock in several functions. It's used in process
context only and some functions sleep inside its critical section. As
this is not allowed for spinlocks, switch it to mutex.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Craig W. Nadler <craig@nadler.us>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Stanse found that isp1362_sw_reset tries to take a isp1362_hcd->lock,
but it is already held in isp1362_hc_stop. Avoid that by introducing
__isp1362_sw_reset which doesn't take the lock and call it from
isp1362_hc_stop. isp1362_sw_reset is then as simple as lock --
__isp1362_sw_reset -- unlock.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Lothar Wassmann <LW@KARO-electronics.de>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Cc: Bryan Wu <cooloney@kernel.org>
Cc: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch corrects a problem with the merge of a previous
patch to add the CONTEC identifier.
I believe the merge problem occurred with the commit:
dee5658b48
Originally I submitted a patch and then they asked me to order the IDs
and resubmit, so did I. But unfortunately in the end somehow both
patches were merged.
Signed-off-by: Daniel Sangorrin <daniel.sangorrin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as1401) fixes a bug in usb_sg_init() that can cause an
invalid pointer dereference. An inner loop reuses some local variables
in an unsafe manner, so new variables are introduced.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Gadget disconnect must be called before unbinding to avoid races.
The change fixes an oops on g_ether module unregistering.
Signed-off-by: Vladimir Zapolskiy <vzapolskiy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
