[PATCH 4/4] drm/vc4: Use dma_resv locking wrappers

[Daniel Vetter]

On Mon, Nov 25, 2019 at 10:43:56AM +0100, Daniel Vetter wrote:
> I'll add more fancy logic to them soon, so everyone really has to use
> them. Plus they already provide some nice additional debug
> infrastructure on top of direct ww_mutex usage for the fences tracked
> by dma_resv.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>

Ping for some review/acks.

Thanks, Daniel

> ---
>  drivers/gpu/drm/vc4/vc4_gem.c | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
> index 7a06cb6e31c5..e1cfc3ccd05a 100644
> --- a/drivers/gpu/drm/vc4/vc4_gem.c
> +++ b/drivers/gpu/drm/vc4/vc4_gem.c
> @@ -568,7 +568,7 @@ vc4_unlock_bo_reservations(struct drm_device *dev,
>  	for (i = 0; i < exec->bo_count; i++) {
>  		struct drm_gem_object *bo = &exec->bo[i]->base;
>  
> -		ww_mutex_unlock(&bo->resv->lock);
> +		dma_resv_unlock(bo->resv);
>  	}
>  
>  	ww_acquire_fini(acquire_ctx);
> @@ -595,8 +595,7 @@ vc4_lock_bo_reservations(struct drm_device *dev,
>  retry:
>  	if (contended_lock != -1) {
>  		bo = &exec->bo[contended_lock]->base;
> -		ret = ww_mutex_lock_slow_interruptible(&bo->resv->lock,
> -						       acquire_ctx);
> +		ret = dma_resv_lock_slow_interruptible(bo->resv, acquire_ctx);
>  		if (ret) {
>  			ww_acquire_done(acquire_ctx);
>  			return ret;
> @@ -609,19 +608,19 @@ vc4_lock_bo_reservations(struct drm_device *dev,
>  
>  		bo = &exec->bo[i]->base;
>  
> -		ret = ww_mutex_lock_interruptible(&bo->resv->lock, acquire_ctx);
> +		ret = dma_resv_lock_interruptible(bo->resv, acquire_ctx);
>  		if (ret) {
>  			int j;
>  
>  			for (j = 0; j < i; j++) {
>  				bo = &exec->bo[j]->base;
> -				ww_mutex_unlock(&bo->resv->lock);
> +				dma_resv_unlock(bo->resv);
>  			}
>  
>  			if (contended_lock != -1 && contended_lock >= i) {
>  				bo = &exec->bo[contended_lock]->base;
>  
> -				ww_mutex_unlock(&bo->resv->lock);
> +				dma_resv_unlock(bo->resv);
>  			}
>  
>  			if (ret == -EDEADLK) {
> -- 
> 2.24.0
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch