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[SCSI] libfc: adds flogi retry in case DID is zero in RJT 

Sometimes switch in NPV mode rejects flogi request with DID
zero and in that case flogi is not tried again and port
remains offline, so this patch validates DID for non zero
along with only ACC response to allow flogi retry
for RJT with DID=0 also succeed FLOGI in next try.

Signed-off-by: Vasu Dev <vasu.dev@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:
Vasu Dev 2010-10-08 17:12:20 -07:00 committed by James Bottomley
parent 75eee72524
commit 60a3c4dfb7
1 changed files with 4 additions and 8 deletions
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12
drivers/scsi/libfc/fc_lport.c
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@ -1447,13 +1447,7 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
} }
did = fc_frame_did(fp); did = fc_frame_did(fp);
if (fc_frame_payload_op(fp) == ELS_LS_ACC && did) {
if (!did) {
FC_LPORT_DBG(lport, "Bad FLOGI response\n");
goto out;
}
if (fc_frame_payload_op(fp) == ELS_LS_ACC) {
flp = fc_frame_payload_get(fp, sizeof(*flp)); flp = fc_frame_payload_get(fp, sizeof(*flp));
if (flp) { if (flp) {
mfs = ntohs(flp->fl_csp.sp_bb_data) & mfs = ntohs(flp->fl_csp.sp_bb_data) &
@ -1492,8 +1486,10 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
fc_lport_enter_dns(lport); fc_lport_enter_dns(lport);
} }
} }
} else } else {
FC_LPORT_DBG(lport, "FLOGI RJT or bad response\n");
fc_lport_error(lport, fp); fc_lport_error(lport, fp);
}
out: out:
fc_frame_free(fp); fc_frame_free(fp);