commit ddfef5de3d upstream.
Increase the retry count for the hard reset function to 100 but
shorten the time out period to 500 ms. See the comment for
ahci_highbank_hardreset for the reasons why those vaulues were
chosen.
Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 7a87718d92 upstream.
For some reason, a lot of port-multipliers have issues with softreset.
SIMG [34]7x series port-multipliers have been quite erratic in this
regard. I recall that it was better with some firmware revisions and
the current list of quirks worked fine for a while. I think it got
worse with later firmwares or maybe my test coverage wasn't good
enough. Anyways, HPA is reporting that his 3726 setup suffers SRST
failures and then the PMP gets confused and fails to probe the last
port.
The hope was that we try to stick to the standard as much as possible
and soonish the PMPs and their firmwares will improve in quality, so
the quirk list was kept to minimum. Well, it seems like that's never
gonna happen.
Let's set NO_SRST for all [34]7x PMPs so that whatever remaining
userbase of the device suffer the least. Maybe we should do the same
for 57xx's but unfortunately I don't have any device left to test and
I'm not even sure 57xx's have ever been made widely available, so
let's leave those alone for now.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit d0887c43f5 upstream.
There are some SATA controllers which have both devices 0 and 1 but this module
just zeroes out taskfile and sets then ATA_TFLAG_DEVICE (not sure that's needed)
which could lead to a wrong device being selected just before issuing command.
Thus we should call ata_tf_init() which sets up the device register value
properly, like all other users of ata_exec_internal() do...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit b1d2bff6a6 upstream.
Driver displays wrong alarms for temperature attributes.
Turns out that temperature alarm bits are not fixed, but determined
by temperature source mapping. To fix the problem, walk through
the temperature sources to determine the correct alarm bit associated
with a given attribute.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 5be1efb4c2 upstream.
snd_pcm_stop() must be called in the PCM substream lock context.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 60478295d6 upstream.
snd_pcm_stop() must be called in the PCM substream lock context.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit cc7282b8d5 upstream.
snd_pcm_stop() must be called in the PCM substream lock context.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 5b9ab3f732 upstream.
snd_pcm_stop() must be called in the PCM substream lock context.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 256ca9c3ad upstream.
We've got bug reports that the module loading stuck on Debian system
with 3.10 kernel. The debugging session revealed that the initial
registration of OSS sequencer clients stuck at module loading time,
which involves again with request_module() at the init phase. This is
triggered only by special --install stuff Debian is using, but it's
still not good to have such loops.
As a workaround, call the registration part asynchronously. This is a
better approach irrespective of the hang fix, in anyway.
Reported-and-tested-by: Philipp Matthias Hahn <pmhahn@pmhahn.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 0c055b3413 upstream.
add_control_with_pfx() in hda_generic.c assumes a shorter name string
for the control element, and this resulted in the truncation of the
long but valid string like "Headphone Surround Switch" in the middle.
This patch aligns the max size to the actual limit of snd_ctl_elem_id,
44.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit d045c5dc43 upstream.
Some VIA codecs like VT1708S have Mic boost amps in the mic pins but
they aren't exposed in the capability bits. In the past driver code,
we override the pin caps and create mic boost controls forcibly.
While transition to the generic parser, we lost the mic boost controls
although the pin caps are still overridden, because the generic parser
code checks the widget caps, too.
So this patch adds a new helper function to allow the override of the
given widget capability bits, and makes VIA codecs driver to add the
missing input-amp capability bit.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=59861
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit bddee96b5d upstream.
When a selection to a converter MUX is changed in hdmi_pcm_open(), it
should be cached so that the given connection can be restored properly
at PM resume. We need just to replace the corresponding
snd_hda_codec_write() call with snd_hda_codec_write_cache().
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 06ec56d3c6 upstream.
The refactoring by commit 9040d102 introduced the new function
snd_hda_check_power_state(). This function is supposed to return true
if the state already reached to the target state, but it actually
returns false for that. An utterly stupid typo while copy & paste.
Fortunately this didn't influence on much behavior because powering up
AFG usually powers up the child widgets, too. But the finer power
control must have been broken by this bug.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 8f0b3b7e22 upstream.
ad1884_fixup_hp_eapd() tries to set the NID for controlling the
speaker EAPD from the pin configuration. But the current code can't
work expectedly since it sets spec->eapd_nid before calling the
generic parser where the autocfg pins are set up.
This patch changes the function to set spec->eapd_nid after the
generic parser call while it sets vmaster hook unconditionally. The
spec->eapd_nid check is moved in the hook function itself instead.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit f91d1b63a4 upstream.
When reading IIO_CHAN_INFO_OFFSET, the return value of iio_channel_read() for
success will be IIO_VAL*, checking for 0 is not correct.
Without this fix the offset applied by iio drivers will be ignored when
converting a raw value to one in appropriate base units (e.g mV) in
a IIO client drivers that use iio_convert_raw_to_processed including
iio-hwmon.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 1c297a6665 upstream.
Since the info_mask split, iio_channel_has_info() is not working correctly.
info_mask_separate and info_mask_shared_by_type, it is not possible to compare
them directly with the iio_chan_info_enum enum. Correct that bit using the BIT()
macro.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit db6f41063c upstream.
On arm64, cache maintenance faults appear as data aborts with the CM
bit set in the ESR. The WnR bit, usually used to distinguish between
faulting loads and stores, always reads as 1 and (slightly confusingly)
the instructions are treated as reads by the architecture.
This patch fixes our fault handling code to treat cache maintenance
faults in the same way as loads.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit e8d05276f2 upstream.
commit 2f7021a8 "cpufreq: protect 'policy->cpus' from offlining
during __gov_queue_work()" caused a regression in CPU hotplug,
because it lead to a deadlock between cpufreq governor worker thread
and the CPU hotplug writer task.
Lockdep splat corresponding to this deadlock is shown below:
[ 60.277396] ======================================================
[ 60.277400] [ INFO: possible circular locking dependency detected ]
[ 60.277407] 3.10.0-rc7-dbg-01385-g241fd04-dirty #1744 Not tainted
[ 60.277411] -------------------------------------------------------
[ 60.277417] bash/2225 is trying to acquire lock:
[ 60.277422] ((&(&j_cdbs->work)->work)){+.+...}, at: [<ffffffff810621b5>] flush_work+0x5/0x280
[ 60.277444] but task is already holding lock:
[ 60.277449] (cpu_hotplug.lock){+.+.+.}, at: [<ffffffff81042d8b>] cpu_hotplug_begin+0x2b/0x60
[ 60.277465] which lock already depends on the new lock.
[ 60.277472] the existing dependency chain (in reverse order) is:
[ 60.277477] -> #2 (cpu_hotplug.lock){+.+.+.}:
[ 60.277490] [<ffffffff810ac6d4>] lock_acquire+0xa4/0x200
[ 60.277503] [<ffffffff815b6157>] mutex_lock_nested+0x67/0x410
[ 60.277514] [<ffffffff81042cbc>] get_online_cpus+0x3c/0x60
[ 60.277522] [<ffffffff814b842a>] gov_queue_work+0x2a/0xb0
[ 60.277532] [<ffffffff814b7891>] cs_dbs_timer+0xc1/0xe0
[ 60.277543] [<ffffffff8106302d>] process_one_work+0x1cd/0x6a0
[ 60.277552] [<ffffffff81063d31>] worker_thread+0x121/0x3a0
[ 60.277560] [<ffffffff8106ae2b>] kthread+0xdb/0xe0
[ 60.277569] [<ffffffff815bb96c>] ret_from_fork+0x7c/0xb0
[ 60.277580] -> #1 (&j_cdbs->timer_mutex){+.+...}:
[ 60.277592] [<ffffffff810ac6d4>] lock_acquire+0xa4/0x200
[ 60.277600] [<ffffffff815b6157>] mutex_lock_nested+0x67/0x410
[ 60.277608] [<ffffffff814b785d>] cs_dbs_timer+0x8d/0xe0
[ 60.277616] [<ffffffff8106302d>] process_one_work+0x1cd/0x6a0
[ 60.277624] [<ffffffff81063d31>] worker_thread+0x121/0x3a0
[ 60.277633] [<ffffffff8106ae2b>] kthread+0xdb/0xe0
[ 60.277640] [<ffffffff815bb96c>] ret_from_fork+0x7c/0xb0
[ 60.277649] -> #0 ((&(&j_cdbs->work)->work)){+.+...}:
[ 60.277661] [<ffffffff810ab826>] __lock_acquire+0x1766/0x1d30
[ 60.277669] [<ffffffff810ac6d4>] lock_acquire+0xa4/0x200
[ 60.277677] [<ffffffff810621ed>] flush_work+0x3d/0x280
[ 60.277685] [<ffffffff81062d8a>] __cancel_work_timer+0x8a/0x120
[ 60.277693] [<ffffffff81062e53>] cancel_delayed_work_sync+0x13/0x20
[ 60.277701] [<ffffffff814b89d9>] cpufreq_governor_dbs+0x529/0x6f0
[ 60.277709] [<ffffffff814b76a7>] cs_cpufreq_governor_dbs+0x17/0x20
[ 60.277719] [<ffffffff814b5df8>] __cpufreq_governor+0x48/0x100
[ 60.277728] [<ffffffff814b6b80>] __cpufreq_remove_dev.isra.14+0x80/0x3c0
[ 60.277737] [<ffffffff815adc0d>] cpufreq_cpu_callback+0x38/0x4c
[ 60.277747] [<ffffffff81071a4d>] notifier_call_chain+0x5d/0x110
[ 60.277759] [<ffffffff81071b0e>] __raw_notifier_call_chain+0xe/0x10
[ 60.277768] [<ffffffff815a0a68>] _cpu_down+0x88/0x330
[ 60.277779] [<ffffffff815a0d46>] cpu_down+0x36/0x50
[ 60.277788] [<ffffffff815a2748>] store_online+0x98/0xd0
[ 60.277796] [<ffffffff81452a28>] dev_attr_store+0x18/0x30
[ 60.277806] [<ffffffff811d9edb>] sysfs_write_file+0xdb/0x150
[ 60.277818] [<ffffffff8116806d>] vfs_write+0xbd/0x1f0
[ 60.277826] [<ffffffff811686fc>] SyS_write+0x4c/0xa0
[ 60.277834] [<ffffffff815bbbbe>] tracesys+0xd0/0xd5
[ 60.277842] other info that might help us debug this:
[ 60.277848] Chain exists of:
(&(&j_cdbs->work)->work) --> &j_cdbs->timer_mutex --> cpu_hotplug.lock
[ 60.277864] Possible unsafe locking scenario:
[ 60.277869] CPU0 CPU1
[ 60.277873] ---- ----
[ 60.277877] lock(cpu_hotplug.lock);
[ 60.277885] lock(&j_cdbs->timer_mutex);
[ 60.277892] lock(cpu_hotplug.lock);
[ 60.277900] lock((&(&j_cdbs->work)->work));
[ 60.277907] *** DEADLOCK ***
[ 60.277915] 6 locks held by bash/2225:
[ 60.277919] #0: (sb_writers#6){.+.+.+}, at: [<ffffffff81168173>] vfs_write+0x1c3/0x1f0
[ 60.277937] #1: (&buffer->mutex){+.+.+.}, at: [<ffffffff811d9e3c>] sysfs_write_file+0x3c/0x150
[ 60.277954] #2: (s_active#61){.+.+.+}, at: [<ffffffff811d9ec3>] sysfs_write_file+0xc3/0x150
[ 60.277972] #3: (x86_cpu_hotplug_driver_mutex){+.+...}, at: [<ffffffff81024cf7>] cpu_hotplug_driver_lock+0x17/0x20
[ 60.277990] #4: (cpu_add_remove_lock){+.+.+.}, at: [<ffffffff815a0d32>] cpu_down+0x22/0x50
[ 60.278007] #5: (cpu_hotplug.lock){+.+.+.}, at: [<ffffffff81042d8b>] cpu_hotplug_begin+0x2b/0x60
[ 60.278023] stack backtrace:
[ 60.278031] CPU: 3 PID: 2225 Comm: bash Not tainted 3.10.0-rc7-dbg-01385-g241fd04-dirty #1744
[ 60.278037] Hardware name: Acer Aspire 5741G /Aspire 5741G , BIOS V1.20 02/08/2011
[ 60.278042] ffffffff8204e110 ffff88014df6b9f8 ffffffff815b3d90 ffff88014df6ba38
[ 60.278055] ffffffff815b0a8d ffff880150ed3f60 ffff880150ed4770 3871c4002c8980b2
[ 60.278068] ffff880150ed4748 ffff880150ed4770 ffff880150ed3f60 ffff88014df6bb00
[ 60.278081] Call Trace:
[ 60.278091] [<ffffffff815b3d90>] dump_stack+0x19/0x1b
[ 60.278101] [<ffffffff815b0a8d>] print_circular_bug+0x2b6/0x2c5
[ 60.278111] [<ffffffff810ab826>] __lock_acquire+0x1766/0x1d30
[ 60.278123] [<ffffffff81067e08>] ? __kernel_text_address+0x58/0x80
[ 60.278134] [<ffffffff810ac6d4>] lock_acquire+0xa4/0x200
[ 60.278142] [<ffffffff810621b5>] ? flush_work+0x5/0x280
[ 60.278151] [<ffffffff810621ed>] flush_work+0x3d/0x280
[ 60.278159] [<ffffffff810621b5>] ? flush_work+0x5/0x280
[ 60.278169] [<ffffffff810a9b14>] ? mark_held_locks+0x94/0x140
[ 60.278178] [<ffffffff81062d77>] ? __cancel_work_timer+0x77/0x120
[ 60.278188] [<ffffffff810a9cbd>] ? trace_hardirqs_on_caller+0xfd/0x1c0
[ 60.278196] [<ffffffff81062d8a>] __cancel_work_timer+0x8a/0x120
[ 60.278206] [<ffffffff81062e53>] cancel_delayed_work_sync+0x13/0x20
[ 60.278214] [<ffffffff814b89d9>] cpufreq_governor_dbs+0x529/0x6f0
[ 60.278225] [<ffffffff814b76a7>] cs_cpufreq_governor_dbs+0x17/0x20
[ 60.278234] [<ffffffff814b5df8>] __cpufreq_governor+0x48/0x100
[ 60.278244] [<ffffffff814b6b80>] __cpufreq_remove_dev.isra.14+0x80/0x3c0
[ 60.278255] [<ffffffff815adc0d>] cpufreq_cpu_callback+0x38/0x4c
[ 60.278265] [<ffffffff81071a4d>] notifier_call_chain+0x5d/0x110
[ 60.278275] [<ffffffff81071b0e>] __raw_notifier_call_chain+0xe/0x10
[ 60.278284] [<ffffffff815a0a68>] _cpu_down+0x88/0x330
[ 60.278292] [<ffffffff81024cf7>] ? cpu_hotplug_driver_lock+0x17/0x20
[ 60.278302] [<ffffffff815a0d46>] cpu_down+0x36/0x50
[ 60.278311] [<ffffffff815a2748>] store_online+0x98/0xd0
[ 60.278320] [<ffffffff81452a28>] dev_attr_store+0x18/0x30
[ 60.278329] [<ffffffff811d9edb>] sysfs_write_file+0xdb/0x150
[ 60.278337] [<ffffffff8116806d>] vfs_write+0xbd/0x1f0
[ 60.278347] [<ffffffff81185950>] ? fget_light+0x320/0x4b0
[ 60.278355] [<ffffffff811686fc>] SyS_write+0x4c/0xa0
[ 60.278364] [<ffffffff815bbbbe>] tracesys+0xd0/0xd5
[ 60.280582] smpboot: CPU 1 is now offline
The intention of that commit was to avoid warnings during CPU
hotplug, which indicated that offline CPUs were getting IPIs from the
cpufreq governor's work items. But the real root-cause of that
problem was commit a66b2e5 (cpufreq: Preserve sysfs files across
suspend/resume) because it totally skipped all the cpufreq callbacks
during CPU hotplug in the suspend/resume path, and hence it never
actually shut down the cpufreq governor's worker threads during CPU
offline in the suspend/resume path.
Reflecting back, the reason why we never suspected that commit as the
root-cause earlier, was that the original issue was reported with
just the halt command and nobody had brought in suspend/resume to the
equation.
The reason for _that_ in turn, as it turns out, is that earlier
halt/shutdown was being done by disabling non-boot CPUs while tasks
were frozen, just like suspend/resume.... but commit cf7df378a
(reboot: migrate shutdown/reboot to boot cpu) which came somewhere
along that very same time changed that logic: shutdown/halt no longer
takes CPUs offline. Thus, the test-cases for reproducing the bug
were vastly different and thus we went totally off the trail.
Overall, it was one hell of a confusion with so many commits
affecting each other and also affecting the symptoms of the problems
in subtle ways. Finally, now since the original problematic commit
(a66b2e5) has been completely reverted, revert this intermediate fix
too (2f7021a8), to fix the CPU hotplug deadlock. Phew!
Reported-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reported-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Tested-by: Peter Wu <lekensteyn@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit aae760ed21 upstream.
commit a66b2e (cpufreq: Preserve sysfs files across suspend/resume)
has unfortunately caused several things in the cpufreq subsystem to
break subtly after a suspend/resume cycle.
The intention of that patch was to retain the file permissions of the
cpufreq related sysfs files across suspend/resume. To achieve that,
the commit completely removed the calls to cpufreq_add_dev() and
__cpufreq_remove_dev() during suspend/resume transitions. But the
problem is that those functions do 2 kinds of things:
1. Low-level initialization/tear-down that are critical to the
correct functioning of cpufreq-core.
2. Kobject and sysfs related initialization/teardown.
Ideally we should have reorganized the code to cleanly separate these
two responsibilities, and skipped only the sysfs related parts during
suspend/resume. Since we skipped the entire callbacks instead (which
also included some CPU and cpufreq-specific critical components),
cpufreq subsystem started behaving erratically after suspend/resume.
So revert the commit to fix the regression. We'll revisit and address
the original goal of that commit separately, since it involves quite a
bit of careful code reorganization and appears to be non-trivial.
(While reverting the commit, note that another commit f51e1eb
(cpufreq: Fix cpufreq regression after suspend/resume) already
reverted part of the original set of changes. So revert only the
remaining ones).
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 4ea355b536 upstream.
In power_pmu_enable() we still enable the PMU even if we have zero
events. This should have no effect but doesn't make much sense. Instead
just return after telling the hypervisor that we are not using the PMCs.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 7a7a41f9d5 upstream.
On Power8 we can freeze PMC5 and 6 if we're not using them. Normally they
run all the time.
As noticed by Anshuman, we should unfreeze them when we disable the PMU
as there are legacy tools which expect them to run all the time.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 378a6ee99e upstream.
In pmu_disable() we disable the PMU by setting the FC (Freeze Counters)
bit in MMCR0. In order to do this we have to read/modify/write MMCR0.
It's possible that we read a value from MMCR0 which has PMAO (PMU Alert
Occurred) set. When we write that value back it will cause an interrupt
to occur. We will then end up in the PMU interrupt handler even though
we are supposed to have just disabled the PMU.
We can avoid this by making sure we never write PMAO back. We should not
lose interrupts because when the PMU is re-enabled the overflowed values
will cause another interrupt.
We also reorder the clearing of SAMPLE_ENABLE so that is done after the
PMU is frozen. Otherwise there is a small window between the clearing of
SAMPLE_ENABLE and the setting of FC where we could take an interrupt and
incorrectly see SAMPLE_ENABLE not set. This would for example change the
logic in perf_read_regs().
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit d8bec4c9cd upstream.
A mistake we have made in the past is that we pull out the fields we
need from the event code, but don't check that there are no unknown bits
set. This means that we can't ever assign meaning to those unknown bits
in future.
Although we have once again failed to do this at release, it is still
early days for Power8 so I think we can still slip this in and get away
with it.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit dd023217e1 upstream.
The topology update code that updates the cpu node registration in sysfs
should not be called while in stop_machine(). The register/unregister
calls take a lock and may sleep.
This patch moves these calls outside of the call to stop_machine().
Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 8246aca705 upstream.
the smp_release_cpus is a normal funciton and called in normal environments,
but it calls the __initdata spinning_secondaries.
need modify spinning_secondaries to match smp_release_cpus.
the related warning:
(the linker report boot_paca.33377, but it should be spinning_secondaries)
-----------------------------------------------------------------------------
WARNING: arch/powerpc/kernel/built-in.o(.text+0x23176): Section mismatch in reference from the function .smp_release_cpus() to the variable .init.data:boot_paca.33377
The function .smp_release_cpus() references
the variable __initdata boot_paca.33377.
This is often because .smp_release_cpus lacks a __initdata
annotation or the annotation of boot_paca.33377 is wrong.
WARNING: arch/powerpc/kernel/built-in.o(.text+0x231fe): Section mismatch in reference from the function .smp_release_cpus() to the variable .init.data:boot_paca.33377
The function .smp_release_cpus() references
the variable __initdata boot_paca.33377.
This is often because .smp_release_cpus lacks a __initdata
annotation or the annotation of boot_paca.33377 is wrong.
-----------------------------------------------------------------------------
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit b14b6260ef upstream.
Similar to the facility unavailble exception, except the facilities are
controlled by HFSCR.
Adapt the facility_unavailable_exception() so it can be called for
either the regular or Hypervisor facility unavailable exceptions.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 021424a1fc upstream.
The exception at 0xf60 is not the TM (Transactional Memory) unavailable
exception, it is the "Facility Unavailable Exception", rename it as
such.
Flesh out the handler to acknowledge the fact that it can be called for
many reasons, one of which is TM being unavailable.
Use STD_EXCEPTION_COMMON() for the exception body, for some reason we
had it open-coded, I've checked the generated code is identical.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit c9f69518e5 upstream.
KVMTEST is a macro which checks whether we are taking an exception from
guest context, if so we branch out of line and eventually call into the
KVM code to handle the switch.
When running real guests on bare metal (HV KVM) the hardware ensures
that we never take a relocation on exception when transitioning from
guest to host. For PR KVM we disable relocation on exceptions ourself in
kvmppc_core_init_vm(), as of commit a413f47 "Disable relocation on
exceptions whenever PR KVM is active".
So convert all the RELON macros to use NOTEST, and drop the remaining
KVM_HANDLER() definitions we have for 0xe40 and 0xe80.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 1d567cb4bd upstream.
We have relocation on exception handlers defined for h_data_storage and
h_instr_storage. However we will never take relocation on exceptions for
these because they can only come from a guest, and we never take
relocation on exceptions when we transition from guest to host.
We also have a handler for hmi_exception (Hypervisor Maintenance) which
is defined in the architecture to never be delivered with relocation on,
see see v2.07 Book III-S section 6.5.
So remove the handlers, leaving a branch to self just to be double extra
paranoid.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 87b4e5393a upstream.
Currently we only restore signals which are transactionally suspended but it's
possible that the transaction can be restored even when it's active. Most
likely this will result in a transactional rollback by the hardware as the
transaction will have been doomed by an earlier treclaim.
The current code is a legacy of earlier kernel implementations which did
software rollback of active transactions in the kernel. That code has now gone
but we didn't correctly fix up this part of the signals code which still makes
assumptions based on having software rollback.
This changes the signal return code to always restore both contexts on 64 bit
signal return. It also ensures that the MSR TM bits are properly restored from
the signal context which they are not currently.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 55e4341850 upstream.
Currently we only restore signals which are transactionally suspended but it's
possible that the transaction can be restored even when it's active. Most
likely this will result in a transactional rollback by the hardware as the
transaction will have been doomed by an earlier treclaim.
The current code is a legacy of earlier kernel implementations which did
software rollback of active transactions in the kernel. That code has now gone
but we didn't correctly fix up this part of the signals code which still makes
assumptions based on having software rollback.
This changes the signal return code to always restore both contexts on 32 bit
rt signal return.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 2c27a18f87 upstream.
Currently we clear out the MSR TM bits on signal return assuming that the
signal should never return to an active transaction.
This is bogus as the user may do this. It's most likely the transaction will
be doomed due to a treclaim but that's a problem for the HW not the kernel.
The current code is a legacy of earlier kernel implementations which did
software rollback of active transactions in the kernel. That code has now gone
but we didn't correctly fix up this part of the signals code which still makes
the assumption that it must be returning to a suspended transaction.
This pulls out both MSR TM bits from the user supplied context rather than just
setting TM suspend. We pull out only the bits needed to ensure the user can't
do anything dangerous to the MSR.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit fee5545071 upstream.
Currently sys_sigreturn() is TM unaware. Therefore, if we take a 32 bit signal
without SIGINFO (non RT) inside a transaction, on signal return we don't
restore the signal frame correctly.
This checks if the signal frame being restoring is an active transaction, and
if so, it copies the additional state to ptregs so it can be restored.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 1d25f11fdb upstream.
The MSR TM controls are in the top 32 bits of the MSR hence on 32 bit signals,
we stick the top half of the MSR in the checkpointed signal context so that the
user can access it.
Unfortunately, we don't currently write anything to the checkpointed signal
context when coming in a from a non transactional process and hence the top MSR
bits can contain junk.
This updates the 32 bit signal handling code to always write something to the
top MSR bits so that users know if the process is transactional or not and the
kernel can use it on signal return.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 74251fe21b upstream.
So because those things always end up in trainwrecks... In 7846de406
we moved back the iommu initialization earlier, essentially undoing
37f02195b which was causing us endless trouble... except that in the
meantime we had merged 959c9bdd58 (to workaround the original breakage)
which is now ... broken :-)
This fixes it by doing a partial revert of the latter (we keep the
ppc_md. path which will be needed in the hotplug case, which happens
also during some EEH error recovery situations).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit e2a800beac upstream.
The Data Address Watchpoint Register (DAWR) on POWER8 can take a 512
byte range but this range must not cross a 512 byte boundary.
Unfortunately we were off by one when calculating the end of the region,
hence we were not allowing some breakpoint regions which were actually
valid. This fixes this error.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Reported-by: Edjunior Barbosa Machado <emachado@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 540e07c67e upstream.
In 9422de3 "powerpc: Hardware breakpoints rewrite to handle non DABR breakpoint
registers" we changed the way we mark extraneous irqs with this:
- info->extraneous_interrupt = !((bp->attr.bp_addr <= dar) &&
- (dar - bp->attr.bp_addr < bp->attr.bp_len));
+ if (!((bp->attr.bp_addr <= dar) &&
+ (dar - bp->attr.bp_addr < bp->attr.bp_len)))
+ info->type |= HW_BRK_TYPE_EXTRANEOUS_IRQ;
Unfortunately this is bogus as it never clears extraneous IRQ if it's already
set.
This correctly clears extraneous IRQ before possibly setting it.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Reported-by: Edjunior Barbosa Machado <emachado@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit b0b0aa9c7f upstream.
The smallest match region for both the DABR and DAWR is 8 bytes, so the
kernel needs to filter matches when users want to look at regions smaller than
this.
Currently we set the length of PPC_BREAKPOINT_MODE_EXACT breakpoints to 8.
This is wrong as in exact mode we should only match on 1 address, hence the
length should be 1.
This ensures that the kernel will filter out any exact mode hardware breakpoint
matches on any addresses other than the requested one.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Reported-by: Edjunior Barbosa Machado <emachado@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit beadadfa54 upstream.
When mounting an UBIFS R/W volume, we have the message:
UBIFS: mounted UBI device 0, volume 1, name "rootfs"(null)
With this patch, we'll have:
UBIFS: mounted UBI device 0, volume 1, name "rootfs"
Which is, I think, what was intended.
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit fdf96a907c upstream.
This is RH bug 970891
Uppercasing of username during calculation of ntlmv2 hash fails
because UniStrupr function does not handle big endian wchars.
Also fix a comment in the same code to reflect its correct usage.
[To make it easier for stable (rather than require 2nd patch) fixed
this patch of Shirish's to remove endian warning generated
by sparse -- steve f.]
Reported-by: steve <sanpatr1@in.ibm.com>
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit f37a96914d upstream.
mem_cgroup_css_online calls mem_cgroup_put if memcg_init_kmem fails.
This is not correct because only memcg_propagate_kmem takes an
additional reference while mem_cgroup_sockets_init is allowed to fail as
well (although no current implementation fails) but it doesn't take any
reference. This all suggests that it should be memcg_propagate_kmem
that should clean up after itself so this patch moves mem_cgroup_put
over there.
Unfortunately this is not that easy (as pointed out by Li Zefan) because
memcg_kmem_mark_dead marks the group dead (KMEM_ACCOUNTED_DEAD) if it is
marked active (KMEM_ACCOUNTED_ACTIVE) which is the case even if
memcg_propagate_kmem fails so the additional reference is dropped in
that case in kmem_cgroup_destroy which means that the reference would be
dropped two times.
The easiest way then would be to simply remove mem_cgrroup_put from
mem_cgroup_css_online and rely on kmem_cgroup_destroy doing the right
thing.
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Li Zefan <lizefan@huawei.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Glauber Costa <glommer@openvz.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
