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[SCSI] libfc: fix ddp in fc_fcp for 0 xid 

xid 0 was used as an indication of invalid xid before but now xid 0
can be used as a valid exchange i. This patch fixes the ddp completion
in fcp layer, i.e., in fc_fcp.c:fc_fcp_ddp_done() function, to make sure it
does not use xid 0 for indication of an invalid xid, instead, it now
uses use FC_XID_UNKNOWN for such indication.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Yi Zou 2009-10-21 16:26:50 -07:00 committed by James Bottomley
parent 85b5893ca9
commit 5e472d077f
1 changed files with 6 additions and 2 deletions
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8
drivers/scsi/libfc/fc_fcp.c
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@ -302,10 +302,13 @@ static void fc_fcp_ddp_done(struct fc_fcp_pkt *fsp)
if (!fsp)
return;
if (fsp->xfer_ddp == FC_XID_UNKNOWN)
return;
lp = fsp->lp;
if (fsp->xfer_ddp && lp->tt.ddp_done) {
if (lp->tt.ddp_done) {
fsp->xfer_len = lp->tt.ddp_done(lp, fsp->xfer_ddp);
fsp->xfer_ddp = 0;
fsp->xfer_ddp = FC_XID_UNKNOWN;
}
}
@ -1708,6 +1711,7 @@ int fc_queuecommand(struct scsi_cmnd *sc_cmd, void (*done)(struct scsi_cmnd *))
fsp->cmd = sc_cmd; /* save the cmd */
fsp->lp = lp; /* save the softc ptr */
fsp->rport = rport; /* set the remote port ptr */
fsp->xfer_ddp = FC_XID_UNKNOWN;
sc_cmd->scsi_done = done;
/*