From: Yi Zou Date: Fri, 27 Feb 2009 22:07:10 +0000 (-0800) Subject: [SCSI] libfc: use lso_max for sequence offload X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=276d68142b7b676594ab8739355c27e9e5b3d41d;p=linux-2.6-omap-h63xx.git [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 Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c index a070e571243..48adb89d911 100644 --- a/drivers/scsi/libfc/fc_fcp.c +++ b/drivers/scsi/libfc/fc_fcp.c @@ -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 */