[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>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/scsi/fc/fc_gs.h b/include/scsi/fc/fc_gs.h
index ffab0272c65a..324dd0e3c622 100644
--- a/include/scsi/fc/fc_gs.h
+++ b/include/scsi/fc/fc_gs.h
@@ -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 */
 };