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drm/i915/hdcp: Add encoder check in intel_hdcp_get_capability

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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.kandpal@intel.com
This commit is contained in:
Suraj Kandpal 2024-07-22 12:14:49 +05:30
parent 76a791fa09
commit 31b42af516
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/i915/display/intel_hdcp.c
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@ -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;