cifs: save the dialect chosen by server

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/cifsglob.h

@@ -185,6 +185,7 @@ struct TCP_Server_Info {
 	struct mac_key mac_signing_key;
 	char ntlmv2_hash[16];
 	unsigned long lstrp; /* when we got last response from this server */
+	u16 dialect; /* dialect index that server chose */
 };
 
 /*

fs/cifs/cifssmb.c

@@ -355,7 +355,6 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
 	struct TCP_Server_Info *server;
 	u16 count;
 	unsigned int secFlags;
-	u16 dialect;
 
 	if (ses->server)
 		server = ses->server;
@@ -408,19 +407,19 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
 	if (rc != 0)
 		goto neg_err_exit;
 
-	dialect = le16_to_cpu(pSMBr->DialectIndex);
-	cFYI(1, "Dialect: %d", dialect);
+	server->dialect = le16_to_cpu(pSMBr->DialectIndex);
+	cFYI(1, "Dialect: %d", server->dialect);
 	/* Check wct = 1 error case */
-	if ((pSMBr->hdr.WordCount < 13) || (dialect == BAD_PROT)) {
+	if ((pSMBr->hdr.WordCount < 13) || (server->dialect == BAD_PROT)) {
 		/* core returns wct = 1, but we do not ask for core - otherwise
 		small wct just comes when dialect index is -1 indicating we
 		could not negotiate a common dialect */
 		rc = -EOPNOTSUPP;
 		goto neg_err_exit;
 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 	} else if ((pSMBr->hdr.WordCount == 13)
-			&& ((dialect == LANMAN_PROT)
-				|| (dialect == LANMAN2_PROT))) {
+			&& ((server->dialect == LANMAN_PROT)
+				|| (server->dialect == LANMAN2_PROT))) {
 		__s16 tmp;
 		struct lanman_neg_rsp *rsp = (struct lanman_neg_rsp *)pSMBr;