From: Suraj Kandpal suraj.kandpal@intel.com
commit 31b42af516afa1e184d1a9f9dd4096c54044269a upstream.
Sometimes during hotplug scenario or suspend/resume scenario encoder is not always initialized when intel_hdcp_get_capability add a check to avoid kernel null pointer dereference.
Signed-off-by: Suraj Kandpal suraj.kandpal@intel.com Reviewed-by: Dnyaneshwar Bhadane dnyaneshwar.bhadane@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20240722064451.3610512-2-suraj... Signed-off-by: Lucas De Marchi lucas.demarchi@intel.com --- drivers/gpu/drm/i915/display/intel_hdcp.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c index b0440cc59c234..c2f42be26128d 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -203,11 +203,16 @@ int intel_hdcp_read_valid_bksv(struct intel_digital_port *dig_port, /* Is HDCP1.4 capable on Platform and Sink */ bool intel_hdcp_get_capability(struct intel_connector *connector) { - struct intel_digital_port *dig_port = intel_attached_dig_port(connector); + struct intel_digital_port *dig_port; const struct intel_hdcp_shim *shim = connector->hdcp.shim; bool capable = false; u8 bksv[5];
+ if (!intel_attached_encoder(connector)) + return capable; + + dig_port = intel_attached_dig_port(connector); + if (!shim) return capable;