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[SCSI] libfc: Add retry logic to lport state machine when receiving LS_RJT

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Call fc_lport_error to retry upto max retry count when
FLOGI/SCR/NS gets rejected.

Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.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:
Bhanu Prakash Gollapudi 2010-07-20 15:21:27 -07:00 committed by James Bottomley
parent cf4aebcafb
commit 7f985231d2
1 changed files with 26 additions and 35 deletions
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61
drivers/scsi/libfc/fc_lport.c
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@ -1012,38 +1012,24 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
PTR_ERR(fp), fc_lport_state(lport),
lport->retry_count);
if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) {
/*
* Memory allocation failure, or the exchange timed out.
* Retry after delay
*/
if (lport->retry_count < lport->max_retry_count) {
lport->retry_count++;
if (!fp)
delay = msecs_to_jiffies(500);
else
delay = msecs_to_jiffies(lport->e_d_tov);
if (PTR_ERR(fp) == -FC_EX_CLOSED)
return;
schedule_delayed_work(&lport->retry_work, delay);
} else {
switch (lport->state) {
case LPORT_ST_DISABLED:
case LPORT_ST_READY:
case LPORT_ST_RESET:
case LPORT_ST_RNN_ID:
case LPORT_ST_RSNN_NN:
case LPORT_ST_RSPN_ID:
case LPORT_ST_RFT_ID:
case LPORT_ST_RFF_ID:
case LPORT_ST_SCR:
case LPORT_ST_DNS:
case LPORT_ST_FLOGI:
case LPORT_ST_LOGO:
fc_lport_enter_reset(lport);
break;
}
}
}
/*
* Memory allocation failure, or the exchange timed out
* or we received LS_RJT.
* Retry after delay
*/
if (lport->retry_count < lport->max_retry_count) {
lport->retry_count++;
if (!fp)
delay = msecs_to_jiffies(500);
else
delay = msecs_to_jiffies(lport->e_d_tov);
schedule_delayed_work(&lport->retry_work, delay);
} else
fc_lport_enter_reset(lport);
}
/**
@ -1461,7 +1447,13 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
}
did = fc_frame_did(fp);
if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) {
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));
if (flp) {
mfs = ntohs(flp->fl_csp.sp_bb_data) &
@ -1500,9 +1492,8 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
fc_lport_enter_dns(lport);
}
}
} else {
FC_LPORT_DBG(lport, "Bad FLOGI response\n");
}
} else
fc_lport_error(lport, fp);
out:
fc_frame_free(fp);