[cifs] fix null pointer check

Dan Carpenter pointed out an inconsistent null pointer check
in smb2_hdr_assemble that was pointed out by static checker.

Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Sachin Prabhu <sprabhu@redhat.com>
CC: Dan Carpenter <dan.carpenter@oracle.com>w

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 65cd7a8..54cbe19 100644 (file)
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -110,7 +110,7 @@ smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ ,
 
        /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
        /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
-       if ((tcon->ses) &&
+       if ((tcon->ses) && (tcon->ses->server) &&
            (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
                hdr->CreditCharge = cpu_to_le16(1);
        /* else CreditCharge MBZ */