Don't try and idle the engine via the ring if the cp is not running.

It means we've cleaned up the ring and bad things will happen (like
panics) on X closedown.

tested by (and ok) beck@

1 files changed, 2 insertions, 0 deletions

diff --git a/sys/dev/pci/drm/radeon_cp.c b/sys/dev/pci/drm/radeon_cp.c
index fde2ff13bd2..00fa0f221c7 100644
--- a/sys/dev/pci/drm/radeon_cp.c
+++ b/sys/dev/pci/drm/radeon_cp.c
@@ -1924,6 +1924,8 @@ radeon_do_cp_idle(drm_radeon_private_t *dev_priv)
 {
 	DRM_DEBUG("\n");
 
+	if (dev_priv->cp_running == 0)
+		return (0);
 
 	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600) {
 		BEGIN_RING(5);