[PATCH] nfs: drop acl cache in __nfs3_proc_setacls

[yangerkun <yangerkun@huawei.com>]

Since server may call posix_acl_update_mode which can lead acl been
NULL. So,just drop acl cache after rpc_call_sync, and if anyone want to
use acl, they can get the correct acl by send a msg to server themselves.
This can fix xfstests generic/099 over nfsv3.

Signed-off-by: yangerkun <yangerkun@huawei.com>
---
 fs/nfs/nfs3acl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 9fce185..6c07ebc 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -222,8 +222,8 @@ static int __nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
 	switch (status) {
 		case 0:
 			status = nfs_refresh_inode(inode, fattr);
-			set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
-			set_cached_acl(inode, ACL_TYPE_DEFAULT, dfacl);
+			/* Sever may call posix_acl_update_mode */
+			forget_all_cached_acls(inode);
 			break;
 		case -EPFNOSUPPORT:
 		case -EPROTONOSUPPORT:
-- 
2.9.5