[PATCH 5.10 194/199] drm/i915/hdcp: Get conn while content_type changed

[Greg Kroah-Hartman]

From: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>

commit 8662e1119a7d1baa1b2001689b2923e9050754bd upstream.

Get DRM connector reference count while scheduling a prop work
to avoid any possible destroy of DRM connector when it is in
DRM_CONNECTOR_REGISTERED state.

Fixes: a6597faa2d59 ("drm/i915: Protect workers against disappearing connectors")
Cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
Cc: Ramalingam C <ramalingam.c@xxxxxxxxx>
Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx>
Reviewed-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
Tested-by: Karthik B S <karthik.b.s@xxxxxxxxx>
Signed-off-by: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20210111081120.28417-3-anshuman.gupta@xxxxxxxxx
(cherry picked from commit b3c6661aad979ec3d4f5675cf3e6a35828607d6a)
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/display/intel_hdcp.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -2187,6 +2187,7 @@ void intel_hdcp_update_pipe(struct intel
 	if (content_protection_type_changed) {
 		mutex_lock(&hdcp->mutex);
 		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		drm_connector_get(&connector->base);
 		schedule_work(&hdcp->prop_work);
 		mutex_unlock(&hdcp->mutex);
 	}