diff options
| author | Quinn Tran <quinn.tran@cavium.com> | 2018-05-01 09:01:47 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-05-08 00:46:11 -0400 |
| commit | bee8b84686c4918354dcf7eef5481b06bde8c26e (patch) | |
| tree | c61fec30987f4a4075885890cc95cebe871539e7 /drivers/scsi/qla2xxx/qla_gs.c | |
| parent | 1d317b21231bb2b81a6e0f94f708b8619ec8775b (diff) | |
| download | lwn-bee8b84686c4918354dcf7eef5481b06bde8c26e.tar.gz lwn-bee8b84686c4918354dcf7eef5481b06bde8c26e.zip | |
scsi: qla2xxx: Reduce redundant ADISC command for RSCNs
For each RSCN that triggers a rescan of the fabric, ADISC is used to
revalidate an existing session. If the RSCN is not affecting all
existing sessions, then driver should not send redundant ADISC for all
existing sessions.
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_gs.c')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_gs.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c index 05abe5aaab7f..939ac8435f19 100644 --- a/drivers/scsi/qla2xxx/qla_gs.c +++ b/drivers/scsi/qla2xxx/qla_gs.c @@ -3862,6 +3862,7 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp) bool found; struct fab_scan_rp *rp; unsigned long flags; + u8 recheck = 0; ql_dbg(ql_dbg_disc, vha, 0xffff, "%s enter\n", __func__); @@ -3914,6 +3915,7 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp) list_for_each_entry(fcport, &vha->vp_fcports, list) { if (memcmp(rp->port_name, fcport->port_name, WWN_SIZE)) continue; + fcport->rscn_rcvd = 0; fcport->scan_state = QLA_FCPORT_FOUND; found = true; /* @@ -3942,10 +3944,13 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp) * Logout all previous fabric dev marked lost, except FCP2 devices. */ list_for_each_entry(fcport, &vha->vp_fcports, list) { - if ((fcport->flags & FCF_FABRIC_DEVICE) == 0) + if ((fcport->flags & FCF_FABRIC_DEVICE) == 0) { + fcport->rscn_rcvd = 0; continue; + } if (fcport->scan_state != QLA_FCPORT_FOUND) { + fcport->rscn_rcvd = 0; if ((qla_dual_mode_enabled(vha) || qla_ini_mode_enabled(vha)) && atomic_read(&fcport->state) == FCS_ONLINE) { @@ -3963,15 +3968,31 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp) continue; } } - } else - qla24xx_fcport_handle_login(vha, fcport); + } else { + if (fcport->rscn_rcvd || + fcport->disc_state != DSC_LOGIN_COMPLETE) { + fcport->rscn_rcvd = 0; + qla24xx_fcport_handle_login(vha, fcport); + } + } } + recheck = 1; out: qla24xx_sp_unmap(vha, sp); spin_lock_irqsave(&vha->work_lock, flags); vha->scan.scan_flags &= ~SF_SCANNING; spin_unlock_irqrestore(&vha->work_lock, flags); + + if (recheck) { + list_for_each_entry(fcport, &vha->vp_fcports, list) { + if (fcport->rscn_rcvd) { + set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags); + set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); + break; + } + } + } } static void qla2x00_find_free_fcp_nvme_slot(struct scsi_qla_host *vha, |