Merge remote-tracking branch 'drm/drm-next' into drm-misc-next

Pull in drm-intel-next for the updates to drm panic handling.

Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>

1 files changed, 11 insertions, 3 deletions

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 19d50d254fe6..0905ef6786e9 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -1429,12 +1429,14 @@ EXPORT_SYMBOL(drm_gem_lru_move_tail);
  * @nr_to_scan: The number of pages to try to reclaim
  * @remaining: The number of pages left to reclaim, should be initialized by caller
  * @shrink: Callback to try to shrink/reclaim the object.
+ * @ticket: Optional ww_acquire_ctx context to use for locking
  */
 unsigned long
 drm_gem_lru_scan(struct drm_gem_lru *lru,
 		 unsigned int nr_to_scan,
 		 unsigned long *remaining,
-		 bool (*shrink)(struct drm_gem_object *obj))
+		 bool (*shrink)(struct drm_gem_object *obj, struct ww_acquire_ctx *ticket),
+		 struct ww_acquire_ctx *ticket)
 {
 	struct drm_gem_lru still_in_lru;
 	struct drm_gem_object *obj;
@@ -1467,17 +1469,20 @@ drm_gem_lru_scan(struct drm_gem_lru *lru,
 		 */
 		mutex_unlock(lru->lock);
 
+		if (ticket)
+			ww_acquire_init(ticket, &reservation_ww_class);
+
 		/*
 		 * Note that this still needs to be trylock, since we can
 		 * hit shrinker in response to trying to get backing pages
 		 * for this obj (ie. while it's lock is already held)
 		 */
-		if (!dma_resv_trylock(obj->resv)) {
+		if (!ww_mutex_trylock(&obj->resv->lock, ticket)) {
 			*remaining += obj->size >> PAGE_SHIFT;
 			goto tail;
 		}
 
-		if (shrink(obj)) {
+		if (shrink(obj, ticket)) {
 			freed += obj->size >> PAGE_SHIFT;
 
 			/*
@@ -1491,6 +1496,9 @@ drm_gem_lru_scan(struct drm_gem_lru *lru,
 
 		dma_resv_unlock(obj->resv);
 
+		if (ticket)
+			ww_acquire_fini(ticket);
+
 tail:
 		drm_gem_object_put(obj);
 		mutex_lock(lru->lock);