drm/lima: Fix dma_resv deadlock at drm object pin time

Commit a780278 ("drm/gem: Acquire reservation lock in
drm_gem_{pin/unpin}()") moved locking the DRM object's dma reservation to
drm_gem_pin(), but Lima's pin callback kept calling drm_gem_shmem_pin,
which also tries to lock the same dma_resv, leading to a double lock
situation.

As was already done for Panfrost in the previous commit, fix it by
replacing drm_gem_shmem_pin() with its locked variant.

Cc: Thomas Zimmermann <[email protected]>
Cc: Dmitry Osipenko <[email protected]>
Cc: Boris Brezillon <[email protected]>
Cc: Steven Price <[email protected]>
Fixes: a780278 ("drm/gem: Acquire reservation lock in drm_gem_{pin/unpin}()")
Signed-off-by: Adrián Larumbe <[email protected]>
Reviewed-by: Boris Brezillon <[email protected]>
Tested-by: Val Packett <[email protected]>
Signed-off-by: Boris Brezillon <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: larunbe

drivers/gpu/drm/lima/lima_gem.c

@@ -185,7 +185,7 @@ static int lima_gem_pin(struct drm_gem_object *obj)
 	if (bo->heap_size)
 		return -EINVAL;
 
-	return drm_gem_shmem_pin(&bo->base);
+	return drm_gem_shmem_pin_locked(&bo->base);
 }
 
 static int lima_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map)