[PATCH] Make __xfs_xattr_put_listen preperly report errors.

[Artem Savkov <asavkov@xxxxxxxxxx>]

Commit "xfs: only return -errno or success from attr ->put_listent" changes the
returnvalue of __xfs_xattr_put_listen to 0 in case when there is insufficient
space in the buffer assuming that setting context->count to -1 would be enough,
but all of the ->put_listent callers only check seen_enough. This results in
a failed assertion:
XFS: Assertion failed: context->count >= 0, file: fs/xfs/xfs_xattr.c, line: 175
in insufficient buffer size case.

Signed-off-by: Artem Savkov <asavkov@xxxxxxxxxx>
---
 fs/xfs/xfs_xattr.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index ea62245..6290093 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -147,6 +147,7 @@ __xfs_xattr_put_listent(
        arraytop = context->count + prefix_len + namelen + 1;
        if (arraytop > context->firstu) {
                context->count = -1;    /* insufficient space */
+               context->seen_enough = 1;
                return 0;
        }
        offset = (char *)context->alist + context->count;
-- 
2.7.4