path: root/block/blk-merge.c
diff options
authorTejun Heo <tj@kernel.org>2009-09-11 14:26:40 +0200
committerJens Axboe <jens.axboe@oracle.com>2009-09-11 14:33:30 +0200
commitda6c5c720c52cc717124f8f0830b710ea6a092fd (patch)
treef54c880aec9289895721e707d4b22e456b277127 /block/blk-merge.c
parent80a761fd33cf812f771e212139157bf8f58d4b3f (diff)
scsi,block: update SCSI to handle mixed merge failures
Update scsi_io_completion() such that it only fails requests till the next error boundary and retry the leftover. This enables block layer to merge requests with different failfast settings and still behave correctly on errors. Allow merge of requests of different failfast settings. As SCSI is currently the only subsystem which follows failfast status, there's no need to worry about other block drivers for now. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Niel Lambrechts <niel.lambrechts@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-merge.c')
1 files changed, 0 insertions, 6 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 7c9ca01baa45..b0de8574fdc8 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -380,12 +380,6 @@ static int attempt_merge(struct request_queue *q, struct request *req,
if (blk_integrity_rq(req) != blk_integrity_rq(next))
return 0;
- /* don't merge requests of different failfast settings */
- if (blk_failfast_dev(req) != blk_failfast_dev(next) ||
- blk_failfast_transport(req) != blk_failfast_transport(next) ||
- blk_failfast_driver(req) != blk_failfast_driver(next))
- return 0;
* If we are allowed to merge, then append bio list
* from next to rq and release next. merge_requests_fn