drm/i915: add i915_lp_ring_sync helper

This just waits until the hw passed the current ring position with
cmd execution. This slightly changes the existing i915_wait_request
function to make uninterruptible waiting possible - no point in
returning to userspace while mucking around with the overlay, that
piece of hw is just too fragile.

Also replace a magic 0 with the symbolic constant (and kill the then
superflous comment) while I was looking at the code.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/drm/drm_os_linux.h b/include/drm/drm_os_linux.h
index 26641e95e0a4..393369147a2d 100644
--- a/include/drm/drm_os_linux.h
+++ b/include/drm/drm_os_linux.h
@@ -123,5 +123,5 @@ do {								\
         remove_wait_queue(&(queue), &entry);                    \
 } while (0)
 
-#define DRM_WAKEUP( queue ) wake_up_interruptible( queue )
+#define DRM_WAKEUP( queue ) wake_up( queue )
 #define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue )