drm/crtc_helper: avoid NULL-pointer dereference when encoder is NULL
Signed-off-by: Maarten Maathuis <madman2003@gmail.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index db0237d..e7e6c25 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -842,7 +842,8 @@
/* If the encoder is reused for another connector, then
* the appropriate crtc will be set later.
*/
- connector->encoder->crtc = NULL;
+ if (connector->encoder)
+ connector->encoder->crtc = NULL;
connector->encoder = new_encoder;
}
}