From f89b8d67db792a8a303e14e3d02785035e6f1a05 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Fri, 30 Sep 2016 11:01:19 +0200 Subject: [PATCH] scsi: libfc: don't advance state machine for incoming FLOGI When we receive an FLOGI but have already sent our own we should not advance the state machine but rather wait for our FLOGI to return before continuing with PLOGI. Signed-off-by: Hannes Reinecke Acked-by: Johannes Thumshirn Signed-off-by: Martin K. Petersen --- drivers/scsi/libfc/fc_rport.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c index 72a7183fdd06..4b9bb6dd4004 100644 --- a/drivers/scsi/libfc/fc_rport.c +++ b/drivers/scsi/libfc/fc_rport.c @@ -765,8 +765,10 @@ static void fc_rport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, goto bad; flogi = fc_frame_payload_get(fp, sizeof(*flogi)); - if (!flogi) + if (!flogi) { + FC_RPORT_DBG(rdata, "Bad FLOGI response\n"); goto bad; + } r_a_tov = ntohl(flogi->fl_csp.sp_r_a_tov); if (r_a_tov > rdata->r_a_tov) rdata->r_a_tov = r_a_tov; @@ -783,7 +785,6 @@ put: kref_put(&rdata->kref, lport->tt.rport_destroy); return; bad: - FC_RPORT_DBG(rdata, "Bad FLOGI response\n"); fc_rport_error_retry(rdata, fp); goto out; } @@ -925,10 +926,17 @@ static void fc_rport_recv_flogi_req(struct fc_lport *lport, fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); lport->tt.frame_send(lport, fp); - if (rdata->ids.port_name < lport->wwpn) - fc_rport_enter_plogi(rdata); - else - fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); + /* + * Do not proceed with the state machine if our + * FLOGI has crossed with an FLOGI from the + * remote port; wait for the FLOGI response instead. + */ + if (rdata->rp_state != RPORT_ST_FLOGI) { + if (rdata->ids.port_name < lport->wwpn) + fc_rport_enter_plogi(rdata); + else + fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT); + } out: mutex_unlock(&rdata->rp_mutex); kref_put(&rdata->kref, lport->tt.rport_destroy); -- 2.20.1