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[SCSI] libfc: fix: empty zone causes endless discovery retries.

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On some switches, an empty zone causes GPN_FT to be rejected
with reason 9 (unable) explanation 7 (FC-4 types not registered),
which causes discovery to be retried endlessly.  Treat this as
just an empty response and consider discovery complete.

Signed-off-by: Joe Eykholt <[email protected]>
Signed-off-by: Robert Love <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Joe Eykholt 2009-08-25 14:02:33 -07:00 • committed by James Bottomley
commit c762608bf7
2 changed files with 4 additions and 0 deletions
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3
drivers/scsi/libfc/fc_disc.c
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@ -617,6 +617,9 @@ static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
"(check zoning)\n", cp->ct_reason,
cp->ct_explan);
event = DISC_EV_FAILED;
if (cp->ct_reason == FC_FS_RJT_UNABL &&
cp->ct_explan == FC_FS_EXP_FTNR)
event = DISC_EV_SUCCESS;
} else {
FC_DISC_DBG(disc, "GPN_FT unexpected response code "
"%x\n", ntohs(cp->ct_cmd));