Re: [PATCH v9 02/11] drm/panfrost: Don't sync rpm suspension after mmu flushing

[Steven Price]

On 23/11/2022 02:57, Dmitry Osipenko wrote:
> Lockdep warns about potential circular locking dependency of devfreq
> with the fs_reclaim caused by immediate device suspension when mapping is
> released by shrinker. Fix it by doing the suspension asynchronously.
> 
> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>

Reviewed-by: Steven Price <steven.price@xxxxxxx>

> ---
>  drivers/gpu/drm/panfrost/panfrost_mmu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
> index e246d914e7f6..99a0975f6f03 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
> @@ -273,7 +273,7 @@ static void panfrost_mmu_flush_range(struct panfrost_device *pfdev,
>  	if (pm_runtime_active(pfdev->dev))
>  		mmu_hw_do_operation(pfdev, mmu, iova, size, AS_COMMAND_FLUSH_PT);
>  
> -	pm_runtime_put_sync_autosuspend(pfdev->dev);
> +	pm_runtime_put_autosuspend(pfdev->dev);
>  }
>  
>  static int mmu_map_sg(struct panfrost_device *pfdev, struct panfrost_mmu *mmu,