From: Yi Zou Date: Wed, 21 Oct 2009 23:26:50 +0000 (-0700) Subject: [SCSI] libfc: fix ddp in fc_fcp for 0 xid X-Git-Tag: firefly_0821_release~9833^2~3924^2~161 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5e472d077f45de4f37365171bd742f18b3ef20de;p=firefly-linux-kernel-4.4.55.git [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 Signed-off-by: Robert Love Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c index 59a4408b27b5..e6c6f4742368 100644 --- a/drivers/scsi/libfc/fc_fcp.c +++ b/drivers/scsi/libfc/fc_fcp.c @@ -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; /*