drm/i915/hdcp: Fix uninitialized symbol

Move (num_hdcp_streams > 0) condition to stream_encryption()
code block, where it actually belongs.
This fixes the static analysis error of uninitialized symbol 'ret'.

v2:
- return 0 as the return value is already checked. [Ankit]

Cc: Ramalingam C <ramalingam.c@intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210120103032.15198-1-anshuman.gupta@intel.com

drivers/gpu/drm/i915/display/intel_hdcp.c

@@ -878,15 +878,15 @@ static int _intel_hdcp_disable(struct intel_connector *connector)
 		}
 		drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 transcoder: %s stream encryption disabled\n",
 			    transcoder_name(hdcp->stream_transcoder));
+		/*
+		 * If there are other connectors on this port using HDCP,
+		 * don't disable it until it disabled HDCP encryption for
+		 * all connectors in MST topology.
+		 */
+		if (dig_port->num_hdcp_streams > 0)
+			return 0;
 	}
 
-	/*
-	 * If there are other connectors on this port using HDCP, don't disable it
-	 * until it disabled HDCP encryption for all connectors in MST topology.
-	 */
-	if (dig_port->num_hdcp_streams > 0)
-		return ret;
-
 	hdcp->hdcp_encrypted = false;
 	intel_de_write(dev_priv, HDCP_CONF(dev_priv, cpu_transcoder, port), 0);
 	if (intel_de_wait_for_clear(dev_priv,
@@ -1947,10 +1947,10 @@ static int _intel_hdcp2_disable(struct intel_connector *connector)
 		}
 		drm_dbg_kms(&i915->drm, "HDCP 2.2 transcoder: %s stream encryption disabled\n",
 			    transcoder_name(hdcp->stream_transcoder));
-	}
 
-	if (dig_port->num_hdcp_streams > 0)
-		return ret;
+		if (dig_port->num_hdcp_streams > 0)
+			return 0;
+	}
 
 	ret = hdcp2_disable_encryption(connector);