drm/radeon: Restore sw interrupt on resume

Fixes performance drop after suspend/resume on some systems.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/char/drm/radeon_cp.c b/drivers/char/drm/radeon_cp.c
index f5e22bfcc3cb..d4feccbe46d5 100644
--- a/drivers/char/drm/radeon_cp.c
+++ b/drivers/char/drm/radeon_cp.c
@@ -1292,6 +1292,7 @@ static int radeon_do_resume_cp(struct drm_device * dev)
         radeon_cp_init_ring_buffer(dev, dev_priv);
 
         radeon_do_engine_reset(dev);
+        radeon_enable_interrupt(dev);
 
         DRM_DEBUG("radeon_do_resume_cp() complete\n");