[SCSI] lpfc 8.3.13: FC Discovery Fixes and enhancements.

- Retry PLOGI up to 48 times when LS_RJT reason is
  "Unable to supply requested data."
- When dev loss timeout occures do not change state if there
  is an outstanding REG_LOGIN.
- Add logic to ignore REG_LOGIN completion if discovery is
  restarted while waiting for REG_LOGIN.
- Only change state on REG_LOGIN completion if still in
  state waiting for REG_LOGIN completion.
- Only send ADISCs to FCP-2 Targets (not Initiators).

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index c4c7f0ad7468..6b1850c9fdff 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -2740,6 +2740,15 @@ lpfc_els_retry(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
                                 retry = 1;
                                 break;
                         }
+                        if (stat.un.b.lsRjtRsnCodeExp ==
+                            LSEXP_CANT_GIVE_DATA) {
+                                if (cmd == ELS_CMD_PLOGI) {
+                                        delay = 1000;
+                                        maxretry = 48;
+                                }
+                                retry = 1;
+                                break;
+                        }
                         if (cmd == ELS_CMD_PLOGI) {
                                 delay = 1000;
                                 maxretry = lpfc_max_els_tries + 1;