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block: Ensure we only enable integrity metadata for reads and writes

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We'd occasionally attempt to generate protection information for flushes
and other requests with a zero payload. Make sure we only attempt to
enable integrity for reads and writes.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Martin K. Petersen 2014-04-08 22:59:31 -04:00 committed by Jens Axboe
parent 0bc6997306
commit e69f18f06b
1 changed files with 3 additions and 0 deletions
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fs/bio-integrity.c
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@ -182,6 +182,9 @@ static int bdev_integrity_enabled(struct block_device *bdev, int rw)
*/
int bio_integrity_enabled(struct bio *bio)
{
if (!bio_is_rw(bio))
return 0;
/* Already protected? */
if (bio_integrity(bio))
return 0;