linux-kernel - [PATCH 4.9 145/199] ext2: check err when partial != NULL

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Message-Id: <20191219183223.238400832@linuxfoundation.org>
Date:   Thu, 19 Dec 2019 19:33:47 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chengguang Xu <cgxu519@...ernel.net>,
        Jan Kara <jack@...e.cz>
Subject: [PATCH 4.9 145/199] ext2: check err when partial != NULL

From: Chengguang Xu <cgxu519@...ernel.net>

commit e705f4b8aa27a59f8933e8f384e9752f052c469c upstream.

Check err when partial == NULL is meaningless because
partial == NULL means getting branch successfully without
error.

CC: stable@...r.kernel.org
Link: https://lore.kernel.org/r/20191105045100.7104-1-cgxu519@mykernel.net
Signed-off-by: Chengguang Xu <cgxu519@...ernel.net>
Signed-off-by: Jan Kara <jack@...e.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ext2/inode.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -697,10 +697,13 @@ static int ext2_get_blocks(struct inode
 		if (!partial) {
 			count++;
 			mutex_unlock(&ei->truncate_mutex);
-			if (err)
-				goto cleanup;
 			goto got_it;
 		}
+
+		if (err) {
+			mutex_unlock(&ei->truncate_mutex);
+			goto cleanup;
+		}
 	}
 
 	/*