smb3: check for null tcon

Although unlikely to be null, it is confusing to use a pointer
before checking for it to be null so move the use down after
null check.

Addresses-Coverity: 1517586 ("Null pointer dereferences  (REVERSE_INULL)")
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index cbe56ed..0d7feb9 100644 (file)
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -760,8 +760,8 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
                struct cifs_sb_info *cifs_sb,
                struct cached_fid **cfid)
 {
-       struct cifs_ses *ses = tcon->ses;
-       struct TCP_Server_Info *server = ses->server;
+       struct cifs_ses *ses;
+       struct TCP_Server_Info *server;
        struct cifs_open_parms oparms;
        struct smb2_create_rsp *o_rsp = NULL;
        struct smb2_query_info_rsp *qi_rsp = NULL;
@@ -780,6 +780,9 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
            is_smb1_server(tcon->ses->server))
                return -ENOTSUPP;
 
+       ses = tcon->ses;
+       server = ses->server;
+
        if (cifs_sb->root == NULL)
                return -ENOENT;