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[SCSI] libfc: fix: empty zone causes endless discovery retries.
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 <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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@ -617,6 +617,9 @@ static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
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"(check zoning)\n", cp->ct_reason,
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cp->ct_explan);
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event = DISC_EV_FAILED;
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if (cp->ct_reason == FC_FS_RJT_UNABL &&
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cp->ct_explan == FC_FS_EXP_FTNR)
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event = DISC_EV_SUCCESS;
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} else {
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FC_DISC_DBG(disc, "GPN_FT unexpected response code "
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"%x\n", ntohs(cp->ct_cmd));
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@ -87,6 +87,7 @@ enum fc_ct_explan {
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FC_FS_EXP_PNAM = 0x02, /* port name not registered */
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FC_FS_EXP_NNAM = 0x03, /* node name not registered */
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FC_FS_EXP_COS = 0x04, /* class of service not registered */
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FC_FS_EXP_FTNR = 0x07, /* FC-4 types not registered */
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/* definitions not complete */
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};
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