radeon: fix writeback across suspend/resume.

Make writeback not get disabled on resume.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index 248ab4a7d39f..e1678cae9ccb 100644
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -626,8 +626,6 @@ static void radeon_cp_init_ring_buffer(struct drm_device * dev,
                      dev_priv->ring.size_l2qw);
 #endif
 
-        /* Start with assuming that writeback doesn't work */
-        dev_priv->writeback_works = 0;
 
         /* Initialize the scratch register pointer.  This will cause
          * the scratch register values to be written out to memory
@@ -674,6 +672,9 @@ static void radeon_test_writeback(drm_radeon_private_t * dev_priv)
 {
         u32 tmp;
 
+        /* Start with assuming that writeback doesn't work */
+        dev_priv->writeback_works = 0;
+
         /* Writeback doesn't seem to work everywhere, test it here and possibly
          * enable it if it appears to work
          */