--- zzzz-none-000/linux-2.6.39.4/drivers/scsi/scsi_lib.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/drivers/scsi/scsi_lib.c	2021-11-10 13:38:15.000000000 +0000
@@ -213,6 +213,10 @@
 	int ret = DRIVER_ERROR << 24;
 
 	req = blk_get_request(sdev->request_queue, write, __GFP_WAIT);
+	/*== 20161124 AVM/WKR don't access empty req ==*/
+	if (!req) {
+		return ret;
+	}
 
 	if (bufflen &&	blk_rq_map_kern(sdev->request_queue, req,
 					buffer, bufflen, __GFP_WAIT))