cpufreq: intel_pstate: Make hwp_notify_lock a raw spinlock

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commit 8b4865cd90 upstream.

notify_hwp_interrupt() is called via sysvec_thermal() ->
smp_thermal_vector() -> intel_thermal_interrupt() in hard irq context.
For this reason it must not use a simple spin_lock that sleeps with
PREEMPT_RT enabled. So convert it to a raw spinlock.

Reported-by: xiao sheng wen <atzlinux@sina.com>
Link: https://bugs.debian.org/1076483
Signed-off-by: Uwe Kleine-König <ukleinek@debian.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: xiao sheng wen <atzlinux@sina.com>
Link: https://patch.msgid.link/20240919081121.10784-2-ukleinek@debian.org
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[ukleinek: Backport to v6.6.y]
Signed-off-by: Uwe Kleine-König <ukleinek@debian.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Uwe Kleine-König 2024-10-06 22:51:07 +02:00 • committed by Greg Kroah-Hartman

parent 722d2d8fc4

commit 90ebc392ad

1 changed files with 10 additions and 10 deletions

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drivers/cpufreq/intel_pstate.c

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