[PATCH] drm/etnaviv: Use dma_resv locking wrappers

[Lucas Stach]

On Sa, 2019-12-14 at 01:09 +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.
> 
> v2: Fix the lost _interruptible (Michael)
> 
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> Cc: Lucas Stach <l.stach at pengutronix.de>
> Cc: Russell King <linux+etnaviv at armlinux.org.uk>
> Cc: Christian Gmeiner <christian.gmeiner at gmail.com>
> Cc: etnaviv at lists.freedesktop.org
> Cc: "Ruhl, Michael J" <michael.j.ruhl at intel.com>

Reviewed-by: Lucas Stach <l.stach at pengutronix.de>

If you want to stack other stuff on top of this before the next merge
window feel free to take it through drm-misc. Otherwise I'm going to
pick it up with the next sweep.

Regards,
Lucas

> ---
>  drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
> index aa3e4c3b063a..3b0afa156d92 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
> @@ -113,7 +113,7 @@ static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i)
>  	if (submit->bos[i].flags & BO_LOCKED) {
>  		struct drm_gem_object *obj = &submit->bos[i].obj->base;
>  
> -		ww_mutex_unlock(&obj->resv->lock);
> +		dma_resv_unlock(obj->resv);
>  		submit->bos[i].flags &= ~BO_LOCKED;
>  	}
>  }
> @@ -133,8 +133,7 @@ static int submit_lock_objects(struct etnaviv_gem_submit *submit,
>  		contended = i;
>  
>  		if (!(submit->bos[i].flags & BO_LOCKED)) {
> -			ret = ww_mutex_lock_interruptible(&obj->resv->lock,
> -							  ticket);
> +			ret = dma_resv_lock_interruptible(obj->resv, ticket);
>  			if (ret == -EALREADY)
>  				DRM_ERROR("BO at index %u already on submit list\n",
>  					  i);
> @@ -161,8 +160,7 @@ static int submit_lock_objects(struct etnaviv_gem_submit *submit,
>  		obj = &submit->bos[contended].obj->base;
>  
>  		/* we lost out in a seqno race, lock and retry.. */
> -		ret = ww_mutex_lock_slow_interruptible(&obj->resv->lock,
> -						       ticket);
> +		ret = dma_resv_lock_slow_interruptible(obj->resv, ticket);
>  		if (!ret) {
>  			submit->bos[contended].flags |= BO_LOCKED;
>  			slow_locked = contended;