tree 0f4b843f294f7cc586acdb4558bd6c687205143b
parent 9124d3fe21b0947b03f4b87bcfb7acd675d6e85b
author Martin K. Petersen <martin.petersen@oracle.com> 1423156494 -0700
committer Jens Axboe <axboe@fb.com> 1423156494 -0700

block: Quiesce zeroout wrapper

blkdev_issue_zeroout() printed a warning if a device failed a discard or
write same request despite advertising support for these. That's fine
for SCSI since we'll disable these commands if we get an error back from
the disk saying that they are not supported. And consequently the
warning only gets printed once.

There are other types of block devices that support discard, however,
and these may return -EOPNOTSUPP for each command but leave discard
enabled in the queue limits. This will cause a warning message for every
blkdev_issue_zeroout() invocation.

Remove the offending warning messages.

Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>