[Intel-gfx] [PATCH 3/5] Fixing a Possible Null Pointer Dereference.

[Nischal Varide]

This Patch addresses a Possible Null Pointer Dereference of variables
new_stae, new_conn_state and old_state, old_conn_state in intel_sdvo.c

Signed-off-by: Nischal Varide <nischal.varide at intel.com>
---
 drivers/gpu/drm/i915/display/intel_sdvo.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c b/drivers/gpu/drm/i915/display/intel_sdvo.c
index 2da4388e1540..186a2d695bb6 100644
--- a/drivers/gpu/drm/i915/display/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/display/intel_sdvo.c
@@ -2505,6 +2505,9 @@ static int intel_sdvo_atomic_check(struct drm_connector *conn,
 	struct intel_sdvo_connector_state *new_state =
 		to_intel_sdvo_connector_state(new_conn_state);
 
+	if (!(new_conn_state && old_conn_state && old_state && new_state))
+		return 0;
+
 	if (new_conn_state->crtc &&
 	    (memcmp(&old_state->tv, &new_state->tv, sizeof(old_state->tv)) ||
 	     memcmp(&old_conn_state->tv, &new_conn_state->tv, sizeof(old_conn_state->tv)))) {
-- 
2.26.0