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Date:	Wed, 30 Sep 2015 10:42:56 -0700
From:	"Darrick J. Wong" <>
To:	"Theodore Ts'o" <>
Subject: [PATCH] ext4: don't print warnings on successful MMP read completion

If the MMP block reads without error, don't spam dmesg with warnings.

Signed-off-by: Darrick J. Wong <>
 fs/ext4/mmp.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c
index 6eb1a61..7bc0873 100644
--- a/fs/ext4/mmp.c
+++ b/fs/ext4/mmp.c
@@ -104,8 +104,9 @@ static int read_mmp_block(struct super_block *sb, struct buffer_head **bh,
 	ret = -EINVAL;
-	ext4_warning(sb, "Error %d while reading MMP block %llu",
-		     ret, mmp_block);
+	if (ret)
+		ext4_warning(sb, "Error %d while reading MMP block %llu",
+			     ret, mmp_block);
 	return ret;
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