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[CIFS] fix static checker warning 

Dan Carpenter wrote:

The patch 7f420cee8bd6: "[CIFS] Charge at least one credit, if server
says that it supports multicredit" from Jun 23, 2013, leads to the
following Smatch complaint:

fs/cifs/smb2pdu.c:120 smb2_hdr_assemble()
         warn: variable dereferenced before check 'tcon->ses' (see line 115)

CC: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Steve French 2013-06-26 17:52:17 -05:00
parent 52dfb446db
commit 84ceeb9626
1 changed files with 2 additions and 1 deletions
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3
fs/cifs/smb2pdu.c
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@ -111,7 +111,8 @@ smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ ,
/* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */
/* 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->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)
if ((tcon->ses) &&
(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
hdr->CreditCharge = cpu_to_le16(1);
/* else CreditCharge MBZ */