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395913d0b1
linux/drivers/cpufreq
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Mathieu Desnoyers 395913d0b1 [CPUFREQ] remove rwsem lock from CPUFREQ_GOV_STOP call (second call site) 
remove rwsem lock from CPUFREQ_GOV_STOP call (second call site)

commit	42a06f2166

Missed a call site for CPUFREQ_GOV_STOP to remove the rwlock taken around the
teardown. To make a long story short, the rwlock write-lock causes a circular
dependency with cancel_delayed_work_sync(), because the timer handler takes the
read lock.

Note that all callers to __cpufreq_set_policy are taking the rwsem. All sysfs
callers (writers) hold the write rwsem at the earliest sysfs calling stage.

However, the rwlock write-lock is not needed upon governor stop.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
CC: rjw@sisk.pl
CC: mingo@elte.hu
CC: Shaohua Li <shaohua.li@intel.com>
CC: Pekka Enberg <penberg@cs.helsinki.fi>
CC: Dave Young <hidave.darkstar@gmail.com>
CC: "Rafael J. Wysocki" <rjw@sisk.pl>
CC: Rusty Russell <rusty@rustcorp.com.au>
CC: trenn@suse.de
CC: sven.wegener@stealer.net
CC: cpufreq@vger.kernel.org
Signed-off-by: Dave Jones <davej@redhat.com>
2009-09-01 12:45:18 -04:00
..
cpufreq_conservative.c [CPUFREQ] Fix NULL pointer dereference regression in conservative governor 2009-08-04 14:32:10 -04:00
cpufreq_ondemand.c [CPUFREQ] ondemand - Use global sysfs dir for tuning settings 2009-09-01 12:45:18 -04:00
cpufreq_performance.c [CPUFREQ] Don't export governors for default governor 2008-10-09 13:52:44 -04:00
cpufreq_powersave.c [CPUFREQ] Don't export governors for default governor 2008-10-09 13:52:44 -04:00
cpufreq_stats.c [CPUFREQ] checkpatch cleanups for cpufreq_stats 2009-02-24 22:47:30 -05:00
cpufreq_userspace.c [CPUFREQ] checkpatch cleanups for userspace governor 2009-02-24 22:47:30 -05:00
cpufreq.c [CPUFREQ] remove rwsem lock from CPUFREQ_GOV_STOP call (second call site) 2009-09-01 12:45:18 -04:00
freq_table.c [CPUFREQ] checkpatch cleanups for freq_table 2009-02-24 22:47:30 -05:00
Kconfig trivial: fix an -> a typos in documentation and comments 2009-01-06 11:28:07 +01:00
Makefile [CPUFREQ] Conservative cpufreq governer 2005-05-31 19:03:47 -07:00