[PATCH 01/11] drm/vgem: Use ww_mutex_(un)lock even with a NULL context

[Nicolai Hähnle]

From: Nicolai Hähnle <Nicolai.Haehnle at amd.com>

Cc: Peter Zijlstra <peterz at infradead.org>
Cc: Ingo Molnar <mingo at redhat.com>
Cc: Maarten Lankhorst <dev at mblankhorst.nl>
Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: dri-devel at lists.freedesktop.org
Signed-off-by: Nicolai Hähnle <Nicolai.Haehnle at amd.com>
---
 drivers/gpu/drm/vgem/vgem_fence.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/vgem/vgem_fence.c b/drivers/gpu/drm/vgem/vgem_fence.c
index 488909a..e1d516f 100644
--- a/drivers/gpu/drm/vgem/vgem_fence.c
+++ b/drivers/gpu/drm/vgem/vgem_fence.c
@@ -191,12 +191,12 @@ int vgem_fence_attach_ioctl(struct drm_device *dev,
 
 	/* Expose the fence via the dma-buf */
 	ret = 0;
-	mutex_lock(&resv->lock.base);
+	ww_mutex_lock(&resv->lock.base, NULL);
 	if (arg->flags & VGEM_FENCE_WRITE)
 		reservation_object_add_excl_fence(resv, fence);
 	else if ((ret = reservation_object_reserve_shared(resv)) == 0)
 		reservation_object_add_shared_fence(resv, fence);
-	mutex_unlock(&resv->lock.base);
+	ww_mutex_unlock(&resv->lock.base);
 
 	/* Record the fence in our idr for later signaling */
 	if (ret == 0) {
-- 
2.7.4