--- zzzz-none-000/linux-2.6.39.4/drivers/scsi/scsi_error.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/drivers/scsi/scsi_error.c	2021-11-10 13:23:10.000000000 +0000
@@ -1548,6 +1548,10 @@
 	 * request becomes available
 	 */
 	req = blk_get_request(sdev->request_queue, READ, GFP_KERNEL);
+	/*== 20161124 AVM/WKR don't access empty req ==*/
+	if (!req) {
+		return;
+	}
 
 	req->cmd[0] = ALLOW_MEDIUM_REMOVAL;
 	req->cmd[1] = 0;