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sched/cpufreq/schedutil: Fix error path mutex unlock

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commit 1b5d43cfb69759d8ef8d30469cea31d0c037aed5 upstream.

This patch prevents the 'global_tunables_lock' mutex from being
unlocked before being locked.  This mutex is not locked if the
sugov_kthread_create() function fails.

Signed-off-by: Jules Maselbas <jules.maselbas@arm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Chris Redpath <chris.redpath@arm.com>
Cc: Dietmar Eggermann <dietmar.eggemann@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Patrick Bellasi <patrick.bellasi@arm.com>
Cc: Stephen Kyle <stephen.kyle@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: nd@arm.com
Link: http://lkml.kernel.org/r/20180329144301.38419-1-jules.maselbas@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jules Maselbas 2018-03-29 15:43:01 +01:00 committed by Greg Kroah-Hartman
parent c492471db9
commit 423f2c97a2
1 changed files with 1 additions and 2 deletions
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3
kernel/sched/cpufreq_schedutil.c
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@ -605,10 +605,9 @@ fail:
stop_kthread:
sugov_kthread_stop(sg_policy);
free_sg_policy:
mutex_unlock(&global_tunables_lock);
free_sg_policy:
sugov_policy_free(sg_policy);
disable_fast_switch: