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[SCSI] libfc: use lso_max for sequence offload 

Make sure for large send is supported by LLD in outgoing FCP data, we are only
sending the lso_max a time in one single large send, since that is what
supported by LLD.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Yi Zou 2009-02-27 14:07:10 -08:00 committed by James Bottomley
parent ea1e9a9df5
commit 276d68142b
1 changed files with 7 additions and 1 deletions
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8
drivers/scsi/libfc/fc_fcp.c
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@ -435,7 +435,13 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
* burst length (t_blen) to seq_blen, otherwise set t_blen
* to max FC frame payload previously set in fsp->max_payload.
*/
t_blen = lp->seq_offload ? seq_blen : fsp->max_payload;
t_blen = fsp->max_payload;
if (lp->seq_offload) {
t_blen = min(seq_blen, (size_t)lp->lso_max);
FC_DEBUG_FCP("fsp=%p:lso:blen=%zx lso_max=0x%x t_blen=%zx\n",
fsp, seq_blen, lp->lso_max, t_blen);
}
WARN_ON(t_blen < FC_MIN_MAX_PAYLOAD);
if (t_blen > 512)
t_blen &= ~(512 - 1); /* round down to block size */