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Commit c762608b authored by Joe Eykholt's avatar Joe Eykholt Committed by James Bottomley
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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: default avatarJoe Eykholt <jeykholt@cisco.com>
Signed-off-by: default avatarRobert Love <robert.w.love@intel.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 883a337c

drivers/scsi/libfc/fc_disc.c

+3 −0
Original line number Diff line number Diff line
@@ -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));

include/scsi/fc/fc_gs.h

+1 −0
Original line number Diff line number Diff line
@@ -87,6 +87,7 @@ enum fc_ct_explan { 
	FC_FS_EXP_PNAM =	0x02,	/* port name not registered */

	FC_FS_EXP_NNAM =	0x03,	/* node name not registered */

	FC_FS_EXP_COS =		0x04,	/* class of service not registered */

	FC_FS_EXP_FTNR =	0x07,	/* FC-4 types not registered */

	/* definitions not complete */

};