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msm: kgsl: Skip state change in idle check, if requested state is NONE

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After scheduling the idle work for transitioning to either NAP or SLUMBER
it's possible that requested state can change to NONE if any new workload
comes before kgsl_idle_check is executed or it gets the device mutex.
If this happens, current code calls pwrctrl_change_state which fails as
this is not a valid transition. To prevent this, skip calling
pwrctrl_change_state if requested state is NONE.

Change-Id: Iae535c6e2a3230f9e7e210712990eeb405822f4f
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>
Signed-off-by: Pankaj Gupta <gpankaj@codeaurora.org>
This commit is contained in:
Pankaj Gupta 2020-09-02 10:57:31 +05:30
commit 50379951c4
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/msm/kgsl_pwrctrl.c
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@ -1601,6 +1601,18 @@ void kgsl_idle_check(struct work_struct *work)
mutex_lock(&device->mutex);
/*
* After scheduling idle work for transitioning to either NAP or
* SLUMBER, it's possible that requested state can change to NONE
* if any new workload comes before kgsl_idle_check is executed or
* it gets the device mutex. In such case, no need to change state
* to NONE.
*/
if (device->requested_state == KGSL_STATE_NONE) {
mutex_unlock(&device->mutex);
return;
}
requested_state = device->requested_state;
if (device->state == KGSL_STATE_ACTIVE