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cifs: clean up length checks in check2ndT2 

Thus spake David Howells:

The code that follows this:

  	remaining = total_data_size - data_in_this_rsp;
	if (remaining == 0)
		return 0;
	else if (remaining < 0) {

generates better code if you drop the 'remaining' variable and compare
the values directly.

Clean it up per his recommendation...

Reported-and-acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton 2011-03-31 17:32:54 -04:00 committed by Steve French
parent 2b6c26a0a6
commit c0c7b905e9
1 changed files with 13 additions and 13 deletions
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26
fs/cifs/connect.c
View File

@ -248,24 +248,24 @@ static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
remaining = total_data_size - data_in_this_rsp; if (total_data_size == data_in_this_rsp)
if (remaining == 0)
return 0; return 0;
else if (remaining < 0) { else if (total_data_size < data_in_this_rsp) {
cFYI(1, "total data %d smaller than data in frame %d", cFYI(1, "total data %d smaller than data in frame %d",
total_data_size, data_in_this_rsp); total_data_size, data_in_this_rsp);
return -EINVAL; return -EINVAL;
} else {
cFYI(1, "missing %d bytes from transact2, check next response",
remaining);
if (total_data_size > maxBufSize) {
cERROR(1, "TotalDataSize %d is over maximum buffer %d",
total_data_size, maxBufSize);
return -EINVAL;
}
return remaining;
} }
remaining = total_data_size - data_in_this_rsp;
cFYI(1, "missing %d bytes from transact2, check next response",
remaining);
if (total_data_size > maxBufSize) {
cERROR(1, "TotalDataSize %d is over maximum buffer %d",
total_data_size, maxBufSize);
return -EINVAL;
}
return remaining;
} }
static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)