[PATCH 4.9 154/175] btrfs: fix return value mixup in btrfs_get_extent

[Greg Kroah-Hartman]

From: Pavel Machek <pa...@denx.de>

commit 881a3a11c2b858fe9b69ef79ac5ee9978a266dc9 upstream

btrfs_get_extent() sets variable ret, but out: error path expect error
to be in variable err so the error code is lost.

Fixes: 6bf9e4bd6a27 ("btrfs: inode: Verify inode mode to avoid NULL pointer 
dereference")
CC: sta...@vger.kernel.org # 5.4+
Reviewed-by: Nikolay Borisov <nbori...@suse.com>
Signed-off-by: Pavel Machek (CIP) <pa...@denx.de>
Reviewed-by: David Sterba <dste...@suse.com>
Signed-off-by: David Sterba <dste...@suse.com>
[sudip: adjust context]
Signed-off-by: Sudip Mukherjee <sudipm.mukher...@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 fs/btrfs/inode.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7000,7 +7000,7 @@ again:
            found_type == BTRFS_FILE_EXTENT_PREALLOC) {
                /* Only regular file could have regular/prealloc extent */
                if (!S_ISREG(inode->i_mode)) {
-                       ret = -EUCLEAN;
+                       err = -EUCLEAN;
                        btrfs_crit(root->fs_info,
                "regular/prealloc extent found for non-regular inode %llu",
                                   btrfs_ino(inode));