fix crash in scsi_dispatch_cmd()

[karo-tx-linux.git] / block / blk-exec.c

diff --git a/block/blk-exec.c b/block/blk-exec.c
index 8a0e7ec056e7a3bd6db31f19ec72202ae97c581e..a1ebceb332f963ee366aa7ebed60d69c4e1c11cb 100644 (file)
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -50,6 +50,13 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
 {
        int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
 
+       if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))) {
+               rq->errors = -ENXIO;
+               if (rq->end_io)
+                       rq->end_io(rq, rq->errors);
+               return;
+       }
+
        rq->rq_disk = bd_disk;
        rq->end_io = done;
        WARN_ON(irqs_disabled());