[PATCH] drm/vgem: add missing mutex_destroy

[Maíra Canal]

vgem_fence_open() instantiates a mutex for a particular fence
instance, but never destroys it by calling mutex_destroy() in
vgem_fence_close().

So, add the missing mutex_destroy() to guarantee proper resource
destruction.

Signed-off-by: Maíra Canal <mca...@igalia.com>
---
 drivers/gpu/drm/vgem/vgem_fence.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/vgem/vgem_fence.c 
b/drivers/gpu/drm/vgem/vgem_fence.c
index c2a879734d40..e15754178395 100644
--- a/drivers/gpu/drm/vgem/vgem_fence.c
+++ b/drivers/gpu/drm/vgem/vgem_fence.c
@@ -249,4 +249,5 @@ void vgem_fence_close(struct vgem_file *vfile)
 {
        idr_for_each(&vfile->fence_idr, __vgem_fence_idr_fini, vfile);
        idr_destroy(&vfile->fence_idr);
+       mutex_destroy(&vfile->fence_mutex);
 }
-- 
2.39.1