commit e69f18f06b97ed29645d020500222bfcec2b42b2
author Martin K. Petersen <martin.petersen@oracle.com> Tue Apr 08 22:59:31 2014 -0400
committer Jens Axboe <axboe@fb.com> Wed Apr 09 08:00:06 2014 -0600
tree 1541e97cc116a058f42302aed325dc71fb7dfd91
parent 0bc69973066d62f70ce60bd6762b5cb75a699159

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

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>

fs/bio-integrity.c

diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
index b355b98..1c2ce0c 100644
--- a/fs/bio-integrity.c
+++ b/fs/bio-integrity.c
@@ -182,6 +182,9 @@
  */
 int bio_integrity_enabled(struct bio *bio)
 {
+	if (!bio_is_rw(bio))
+		return 0;
+
 	/* Already protected? */
 	if (bio_integrity(bio))
 		return 0;