[S390] tape block: complete request with correct locking
__blk_end_request must be called with request queue lock held. We need to use
blk_end_request rather than __blk_end_request.
Signed-off-by: Frank Munzert <munzert@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/char/tape_block.c b/drivers/s390/char/tape_block.c
index 023803d..ae18baf 100644
--- a/drivers/s390/char/tape_block.c
+++ b/drivers/s390/char/tape_block.c
@@ -76,7 +76,7 @@
static void
tapeblock_end_request(struct request *req, int error)
{
- if (__blk_end_request(req, error, blk_rq_bytes(req)))
+ if (blk_end_request(req, error, blk_rq_bytes(req)))
BUG();
}
@@ -166,7 +166,7 @@
nr_queued++;
spin_unlock(get_ccwdev_lock(device->cdev));
- spin_lock(&device->blk_data.request_queue_lock);
+ spin_lock_irq(&device->blk_data.request_queue_lock);
while (
!blk_queue_plugged(queue) &&
elv_next_request(queue) &&
@@ -176,7 +176,9 @@
if (rq_data_dir(req) == WRITE) {
DBF_EVENT(1, "TBLOCK: Rejecting write request\n");
blkdev_dequeue_request(req);
+ spin_unlock_irq(&device->blk_data.request_queue_lock);
tapeblock_end_request(req, -EIO);
+ spin_lock_irq(&device->blk_data.request_queue_lock);
continue;
}
blkdev_dequeue_request(req);