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cpu/hotplug: Allowing to reset fail injection

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Currently, the only way of resetting the fail injection is to trigger a
hotplug, hotunplug or both. This is rather annoying for testing
and, as the default value for this file is -1, it seems pretty natural to
let a user write it.

Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20210216103506.416286-2-vincent.donnefort@arm.com
This commit is contained in:
Vincent Donnefort 2021-02-16 10:35:04 +00:00 committed by Ingo Molnar
parent b89997aa88
commit 3ae70c251f
1 changed files with 5 additions and 0 deletions
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5
kernel/cpu.c
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@ -2207,6 +2207,11 @@ static ssize_t write_cpuhp_fail(struct device *dev,
if (ret)
return ret;
if (fail == CPUHP_INVALID) {
st->fail = fail;
return count;
}
if (fail < CPUHP_OFFLINE || fail > CPUHP_ONLINE)
return -EINVAL;