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Subject[PATCH 4.13 008/110] dm integrity: do not check integrity for failed read operations
Date
4.13-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Hyunchul Lee <cheol.lee@lge.com>

commit b7e326f7b7375392d06f9cfbc27a7c63181f69d7 upstream.

Even though read operations fail, dm_integrity_map_continue() calls
integrity_metadata() to check integrity. In this case, just complete
these.

This also makes it so read I/O errors do not generate integrity warnings
in the kernel log.

Signed-off-by: Hyunchul Lee <cheol.lee@lge.com>
Acked-by: Milan Broz <gmazyland@gmail.com>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/md/dm-integrity.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -1697,7 +1697,11 @@ sleep:

if (need_sync_io) {
wait_for_completion_io(&read_comp);
- integrity_metadata(&dio->work);
+ if (likely(!bio->bi_status))
+ integrity_metadata(&dio->work);
+ else
+ dec_in_flight(dio);
+
} else {
INIT_WORK(&dio->work, integrity_metadata);
queue_work(ic->metadata_wq, &dio->work);

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