rt2800: enable rt3290 unconditionally on pci probe - net-next.git

diff options

author	Stanislaw Gruszka <sgruszka@redhat.com>	2017-01-30 12:12:47 +0100
committer	Kalle Valo <kvalo@codeaurora.org>	2017-01-31 09:27:38 +0200
commit	6715208d0a95ae417203f8e4a7937c1b4c4947f2 (patch)
tree	979bee37f306943ec3c5217dd1f3be45792496f2 /tools/perf/scripts/perl/bin
parent	a971df0b9d04674e325346c17de9a895425ca5e1 (diff)

rt2800: enable rt3290 unconditionally on pci probe

When we restart system using sysrq RT3290 device do not initalize properly, hance always enable it via WLAN_FUN_CTRL register on probe. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=85461 Reported-and-tested-by: Giedrius Statkevičius <edrius.statkevicius@gmail.com> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Diffstat (limited to 'tools/perf/scripts/perl/bin')

0 files changed, 0 insertions, 0 deletions

lly be acquired but the routines return "false" which results in a reference leak since the caller assumes it does not need to do a corresponding percpu_ref_put(). This was seen when performing CPU hotplug during I/O, as hangs in blk_mq_freeze_queue_wait where percpu_ref_kill (blk_mq_freeze_queue_start) raced with percpu_ref_tryget (blk_mq_timeout_work). Sample stack trace: __switch_to+0x2c0/0x450 __schedule+0x2f8/0x970 schedule+0x48/0xc0 blk_mq_freeze_queue_wait+0x94/0x120 blk_mq_queue_reinit_work+0xb8/0x180 blk_mq_queue_reinit_prepare+0x84/0xa0 cpuhp_invoke_callback+0x17c/0x600 cpuhp_up_callbacks+0x58/0x150 _cpu_up+0xf0/0x1c0 do_cpu_up+0x120/0x150 cpu_subsys_online+0x64/0xe0 device_online+0xb4/0x120 online_store+0xb4/0xc0 dev_attr_store+0x68/0xa0 sysfs_kf_write+0x80/0xb0 kernfs_fop_write+0x17c/0x250 __vfs_write+0x6c/0x1e0 vfs_write+0xd0/0x270 SyS_write+0x6c/0x110 system_call+0x38/0xe0 Examination of the queue showed a single reference (no PERCPU_COUNT_BIAS, and __PERCPU_REF_DEAD, __PERCPU_REF_ATOMIC set) and no requests. However, conditions at the time of the race are count of PERCPU_COUNT_BIAS + 0 and __PERCPU_REF_DEAD and __PERCPU_REF_ATOMIC set. The fix is to make the tryget routines use an actual boolean internally instead of the atomic long result truncated to a int. Fixes: e625305b3907 percpu-refcount: make percpu_ref based on longs instead of ints Link: https://bugzilla.kernel.org/show_bug.cgi?id=190751 Signed-off-by: Douglas Miller <dougmill@linux.vnet.ibm.com> Reviewed-by: Jens Axboe <axboe@fb.com> Signed-off-by: Tejun Heo <tj@kernel.org> Fixes: e625305b3907 ("percpu-refcount: make percpu_ref based on longs instead of ints") Cc: stable@vger.kernel.org # v3.18+

Diffstat (limited to 'tools/perf/pmu-events/arch/x86/westmereep-dp/memory.json')


context:
space:
mode: