From: Naohiro Aota <naohiro.aota@wdc.com>
Date: Mon, 13 Feb 2023 14:10:38 +0900
Subject: [PATCH] btrfs: fix unnecessary increment of read error stat on write
error
References: bsc#1012628
Patch-mainline: 6.2.7
Git-commit: 98e8d36a26c2ed22f78316df7d4bf33e554b9f9f
commit 98e8d36a26c2ed22f78316df7d4bf33e554b9f9f upstream.
Current btrfs_log_dev_io_error() increases the read error count even if the
erroneous IO is a WRITE request. This is because it forget to use "else
if", and all the error WRITE requests counts as READ error as there is (of
course) no REQ_RAHEAD bit set.
Fixes: c3a62baf21ad ("btrfs: use chained bios when cloning")
CC: stable@vger.kernel.org # 6.1+
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
fs/btrfs/bio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/bio.c b/fs/btrfs/bio.c
index 8affc88b..e775d688 100644
--- a/fs/btrfs/bio.c
+++ b/fs/btrfs/bio.c
@@ -72,7 +72,7 @@ static void btrfs_log_dev_io_error(struct bio *bio, struct btrfs_device *dev)
if (btrfs_op(bio) == BTRFS_MAP_WRITE)
btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_WRITE_ERRS);
- if (!(bio->bi_opf & REQ_RAHEAD))
+ else if (!(bio->bi_opf & REQ_RAHEAD))
btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_READ_ERRS);
if (bio->bi_opf & REQ_PREFLUSH)
btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_FLUSH_ERRS);
--
2.35.3