1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index f1022d810d22..4f59b7ec05d0 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -1691,9 +1691,7 @@ static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer *b)
                 ret = __qbuf_mmap(vb, b);
                 break;
         case V4L2_MEMORY_USERPTR:
-                down_read(&current->mm->mmap_sem);
                 ret = __qbuf_userptr(vb, b);
-                up_read(&current->mm->mmap_sem);
                 break;
         case V4L2_MEMORY_DMABUF:
                 ret = __qbuf_dmabuf(vb, b);