Patch "dm integrity: do not check integrity for failed read operations" has been added to the 4.13-stable tree

Patch "dm integrity: do not check integrity for failed read operations" has been added to the 4.13-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    dm integrity: do not check integrity for failed read operations

to the 4.13-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     dm-integrity-do-not-check-integrity-for-failed-read-operations.patch
and it can be found in the queue-4.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From b7e326f7b7375392d06f9cfbc27a7c63181f69d7 Mon Sep 17 00:00:00 2001
From: Hyunchul Lee <cheol.lee@lge.com>
Date: Mon, 31 Jul 2017 16:22:20 +0900
Subject: dm integrity: do not check integrity for failed read operations

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);


Patches currently in stable-queue which might be from cheol.lee@lge.com are

queue-4.13/dm-integrity-do-not-check-integrity-for-failed-read-operations.patch