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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 /drivers/scsi
parent80a761fd33cf812f771e212139157bf8f58d4b3f (diff)
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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 'drivers/scsi')
-rw-r--r--drivers/scsi/scsi_lib.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index f3c4089..90c94da 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -897,8 +897,10 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
if (driver_byte(result) & DRIVER_SENSE)
scsi_print_sense("", cmd);
}
- blk_end_request_all(req, -EIO);
- scsi_next_command(cmd);
+ if (blk_end_request_err(req, -EIO))
+ scsi_requeue_command(q, cmd);
+ else
+ scsi_next_command(cmd);
break;
case ACTION_REPREP:
/* Unprep the request and put it back at the head of the queue.