[PATCH 2/3] drm/i915/hdcp: Add encoder check in hdcp2_get_capability

[Suraj Kandpal]

Add encoder check in intel_hdcp2_get_capability to avoid
null pointer error.

Signed-off-by: Suraj Kandpal <suraj.kandpal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp_hdcp.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
index 2edffe62f360..47f51a5ab493 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
@@ -675,8 +675,15 @@ static
 int intel_dp_hdcp2_get_capability(struct intel_connector *connector,
 				  bool *capable)
 {
-	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
-	struct drm_dp_aux *aux = &dig_port->dp.aux;
+	struct intel_digital_port *dig_port;
+	struct drm_dp_aux *aux;
+
+	*capable = false;
+	if (!intel_attached_encoder(connector))
+		return -EINVAL;
+
+	dig_port = intel_attached_dig_port(connector);
+	aux = &dig_port->dp.aux;
 
 	return _intel_dp_hdcp2_get_capability(aux, capable);
 }
-- 
2.43.2