[SCSI] libfc: discovery restart sequence error fix

When an RSCN is received during fabric discovery, it restarts.
After the restart, disc->seq_count was incremented, so when
the first frame was received, it was considered "out of sequence".
That left the state disc->active, preventing further discoveries.

Change to advance the sequence count before parsing, so that it
won't be changed after a potential restart.
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>

drivers/scsi/libfc/fc_disc.c

@@ -629,11 +629,10 @@ static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
 			    seq_cnt, disc->seq_count, fr_sof(fp), fr_eof(fp));
 	}
 	if (buf) {
+		disc->seq_count++;
 		error = fc_disc_gpn_ft_parse(disc, buf, len);
 		if (error)
 			fc_disc_error(disc, fp);
-		else
-			disc->seq_count++;
 	}
 	fc_frame_free(fp);