xfs: Fix error code in 'xfs_ioc_getbmap()'

In this function, once 'buf' has been allocated, we unconditionally
return 0.
However, 'error' is set to some error codes in several error handling
paths.
Before commit 232b51948b99 ("xfs: simplify the xfs_getbmap interface")
this was not an issue because all error paths were returning directly,
but now that some cleanup at the end may be needed, we must propagate the
error code.

Fixes: 232b51948b99 ("xfs: simplify the xfs_getbmap interface")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 6e2c08f30f602deb360e737003cc3ae1abf4bfc7..6ecdbb3af7de5c02c86a25d41ed7086ae2f845fc 100644 (file)
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -1608,7 +1608,7 @@ xfs_ioc_getbmap(
        error = 0;
 out_free_buf:
        kmem_free(buf);
-       return 0;
+       return error;
 }
 
 struct getfsmap_info {