[PATCH] ocfs2: Fix passing zero to 'PTR_ERR' warning

[Ding Xiang]

Fix a static code checker warning:
fs/ocfs2/acl.c:331
        ocfs2_acl_chmod() warn: passing zero to 'PTR_ERR'

Fixes: 5ee0fbd50fd ("ocfs2: revert using ocfs2_acl_chmod to avoid inode cluster 
lock hang")
Signed-off-by: Ding Xiang <dingxi...@cmss.chinamobile.com>
---
 fs/ocfs2/acl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
index 3e7da39..bb981ec 100644
--- a/fs/ocfs2/acl.c
+++ b/fs/ocfs2/acl.c
@@ -327,8 +327,8 @@ int ocfs2_acl_chmod(struct inode *inode, struct buffer_head 
*bh)
        down_read(&OCFS2_I(inode)->ip_xattr_sem);
        acl = ocfs2_get_acl_nolock(inode, ACL_TYPE_ACCESS, bh);
        up_read(&OCFS2_I(inode)->ip_xattr_sem);
-       if (IS_ERR(acl) || !acl)
-               return PTR_ERR(acl);
+       if (IS_ERR_OR_NULL(acl))
+               return PTR_ERR_OR_ZERO(acl);
        ret = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
        if (ret)
                return ret;
-- 
1.9.1