cpufreq: amd-pstate: Add ->fast_switch() callback

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Schedutil normally calls the adjust_perf callback for drivers with
adjust_perf callback available and fast_switch_possible flag set.
However, when frequency invariance is disabled and schedutil tries to
invoke fast_switch. So, there is a chance of kernel crash if this
function pointer is not set. To protect against this scenario add
fast_switch callback to amd_pstate driver.

Fixes: 1d215f0319 ("cpufreq: amd-pstate: Add fast switch function for AMD P-State")
Signed-off-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Wyes Karny <wyes.karny@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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Gautham R. Shenoy 2023-05-17 16:28:15 +00:00 • committed by Rafael J. Wysocki

parent 44c026a73b

commit 4badf2eb1e

1 changed files with 30 additions and 6 deletions

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drivers/cpufreq/amd-pstate.c

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