[PATCH] drm/amd/powerplay: fix deadlock around smu_handle_task V2

[Quan, Evan]

Ping..

> -----Original Message-----
> From: Evan Quan <evan.quan at amd.com>
> Sent: Friday, July 12, 2019 1:51 PM
> To: amd-gfx at lists.freedesktop.org
> Cc: Wang, Kevin(Yang) <Kevin1.Wang at amd.com>; Quan, Evan
> <Evan.Quan at amd.com>
> Subject: [PATCH] drm/amd/powerplay: fix deadlock around
> smu_handle_task V2
> 
> As the lock was already held on the entrance to smu_handle_task.
> 
> - V2: lock in small granularity
> 
> Change-Id: I5388aa917ef0e330974e26c59db42d1354b6a865
> Signed-off-by: Evan Quan <evan.quan at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> index 961f4e54ed18..eb255a6bd3a9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> @@ -3049,11 +3049,9 @@ void amdgpu_pm_compute_clocks(struct
> amdgpu_device *adev)
>  	if (is_support_sw_smu(adev)) {
>  		struct smu_context *smu = &adev->smu;
>  		struct smu_dpm_context *smu_dpm = &adev-
> >smu.smu_dpm;
> -		mutex_lock(&(smu->mutex));
>  		smu_handle_task(&adev->smu,
>  				smu_dpm->dpm_level,
>  				AMD_PP_TASK_DISPLAY_CONFIG_CHANGE);
> -		mutex_unlock(&(smu->mutex));
>  	} else {
>  		if (adev->powerplay.pp_funcs->dispatch_tasks) {
>  			if (!amdgpu_device_has_dc_support(adev)) {
> --
> 2.21.0