drm/radeon/kms/pm: fix segfault in clock code

Make sure we have a crtc assigned to the encoder before dereferencing it. Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
git-mirror · Mar 30, 2010 · 57f50d7 · 57f50d7
1 parent 29fb52c
commit 57f50d7
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -279,7 +279,8 @@ void radeon_pm_compute_clocks(struct radeon_device *rdev)
 	list_for_each_entry(connector,
 		&ddev->mode_config.connector_list, head) {
 		if (connector->encoder &&
-			connector->dpms != DRM_MODE_DPMS_OFF) {
+		    connector->encoder->crtc &&
+		    connector->dpms != DRM_MODE_DPMS_OFF) {
 			radeon_crtc = to_radeon_crtc(connector->encoder->crtc);
 			rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
 			++count;