fs/9p: Fix error reported by coccicheck

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index ffbb113..82a7c38 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -811,7 +811,7 @@
 	fid = v9fs_fid_lookup(dentry);
 	if (IS_ERR(fid)) {
 		__putname(link);
-		link = ERR_PTR(PTR_ERR(fid));
+		link = ERR_CAST(fid);
 		goto ndset;
 	}
 	retval = p9_client_readlink(fid, &target);