From d8630bb95f46ea118dede63bd75533faa64f9612 Mon Sep 17 00:00:00 2001 From: Quinn Tran Date: Thu, 28 Dec 2017 12:33:43 -0800 Subject: [PATCH] scsi: qla2xxx: Serialize session deletion by using work_lock for session deletion, replace sess_lock with work_lock. Under certain case sess_lock is not feasiable to acquire. The lock is needed temporarily to make sure a single call to schedule of the work element. Signed-off-by: Quinn Tran Signed-off-by: Himanshu Madhani Signed-off-by: Martin K. Petersen --- drivers/scsi/qla2xxx/qla_gbl.h | 1 - drivers/scsi/qla2xxx/qla_gs.c | 14 ++++++-------- drivers/scsi/qla2xxx/qla_init.c | 9 +++------ drivers/scsi/qla2xxx/qla_isr.c | 4 ++-- drivers/scsi/qla2xxx/qla_mbx.c | 2 +- drivers/scsi/qla2xxx/qla_os.c | 5 ++--- drivers/scsi/qla2xxx/qla_target.c | 29 ++++++++++++++--------------- 7 files changed, 28 insertions(+), 36 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h index 47bff9a..e929539 100644 --- a/drivers/scsi/qla2xxx/qla_gbl.h +++ b/drivers/scsi/qla2xxx/qla_gbl.h @@ -888,7 +888,6 @@ void qlt_plogi_ack_link(struct scsi_qla_host *, struct qlt_plogi_ack_t *, struct fc_port *, enum qlt_plogi_link_t); void qlt_plogi_ack_unref(struct scsi_qla_host *, struct qlt_plogi_ack_t *); extern void qlt_schedule_sess_for_deletion(struct fc_port *); -extern void qlt_schedule_sess_for_deletion_lock(struct fc_port *); extern struct fc_port *qlt_find_sess_invalidate_other(scsi_qla_host_t *, uint64_t wwn, port_id_t port_id, uint16_t loop_id, struct fc_port **); void qla24xx_delete_sess_fn(struct work_struct *); diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c index 546011b..6bfe24e 100644 --- a/drivers/scsi/qla2xxx/qla_gs.c +++ b/drivers/scsi/qla2xxx/qla_gs.c @@ -3047,7 +3047,7 @@ void qla24xx_handle_gidpn_event(scsi_qla_host_t *vha, struct event_arg *ea) ql_dbg(ql_dbg_disc, vha, 0x2021, "%s %d %8phC post del sess\n", __func__, __LINE__, fcport->port_name); - qlt_schedule_sess_for_deletion_lock(fcport); + qlt_schedule_sess_for_deletion(fcport); } } } else { /* ea->sp->gen1 != fcport->rscn_gen */ @@ -3064,7 +3064,7 @@ void qla24xx_handle_gidpn_event(scsi_qla_host_t *vha, struct event_arg *ea) ql_dbg(ql_dbg_disc, vha, 0x2042, "%s %d %8phC post del sess\n", __func__, __LINE__, fcport->port_name); - qlt_schedule_sess_for_deletion_lock(fcport); + qlt_schedule_sess_for_deletion(fcport); } else { ql_dbg(ql_dbg_disc, vha, 0x2045, "%s %d %8phC login\n", __func__, __LINE__, @@ -3436,8 +3436,7 @@ void qla24xx_handle_gpnid_event(scsi_qla_host_t *vha, struct event_arg *ea) "%s %d %8phC post del sess\n", __func__, __LINE__, fcport->port_name); - qlt_schedule_sess_for_deletion_lock - (fcport); + qlt_schedule_sess_for_deletion(fcport); break; } } @@ -3470,7 +3469,7 @@ void qla24xx_handle_gpnid_event(scsi_qla_host_t *vha, struct event_arg *ea) "%s %d %8phC post del sess\n", __func__, __LINE__, conflict->port_name); - qlt_schedule_sess_for_deletion_lock + qlt_schedule_sess_for_deletion (conflict); break; } @@ -3528,7 +3527,7 @@ void qla24xx_handle_gpnid_event(scsi_qla_host_t *vha, struct event_arg *ea) "%s %d %8phC post del sess\n", __func__, __LINE__, conflict->port_name); - qlt_schedule_sess_for_deletion_lock + qlt_schedule_sess_for_deletion (conflict); break; } @@ -3959,8 +3958,7 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp) __func__, __LINE__, fcport->port_name); - qlt_schedule_sess_for_deletion_lock - (fcport); + qlt_schedule_sess_for_deletion(fcport); continue; } } diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index aaa8c07..9c08222e 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -1091,7 +1091,7 @@ void qla24xx_handle_gpdb_event(scsi_qla_host_t *vha, struct event_arg *ea) default: ql_dbg(ql_dbg_disc, vha, 0x20d5, "%s %d %8phC post del sess\n", __func__, __LINE__, fcport->port_name); - qlt_schedule_sess_for_deletion_lock(fcport); + qlt_schedule_sess_for_deletion(fcport); return; } __qla24xx_handle_gpdb_event(vha, ea); @@ -4964,8 +4964,7 @@ qla2x00_configure_local_loop(scsi_qla_host_t *vha) __func__, __LINE__, fcport->port_name); - qlt_schedule_sess_for_deletion_lock - (fcport); + qlt_schedule_sess_for_deletion(fcport); continue; } } @@ -5552,9 +5551,7 @@ qla2x00_find_all_fabric_devs(scsi_qla_host_t *vha) "%s %d %8phC post del sess\n", __func__, __LINE__, fcport->port_name); - - qlt_schedule_sess_for_deletion_lock - (fcport); + qlt_schedule_sess_for_deletion(fcport); continue; } } diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c index a37a2a4..14109d8 100644 --- a/drivers/scsi/qla2xxx/qla_isr.c +++ b/drivers/scsi/qla2xxx/qla_isr.c @@ -1009,7 +1009,7 @@ skip_rio: if (qla_ini_mode_enabled(vha)) { qla2x00_mark_device_lost(fcport->vha, fcport, 1, 1); fcport->logout_on_delete = 0; - qlt_schedule_sess_for_deletion_lock(fcport); + qlt_schedule_sess_for_deletion(fcport); } break; @@ -2701,7 +2701,7 @@ check_scsi_status: comp_status); qla2x00_mark_device_lost(fcport->vha, fcport, 1, 1); - qlt_schedule_sess_for_deletion_lock(fcport); + qlt_schedule_sess_for_deletion(fcport); } break; diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c index 8455058..7397aed 100644 --- a/drivers/scsi/qla2xxx/qla_mbx.c +++ b/drivers/scsi/qla2xxx/qla_mbx.c @@ -3896,7 +3896,7 @@ qla24xx_report_id_acquisition(scsi_qla_host_t *vha, case DSC_DELETE_PEND: break; default: - qlt_schedule_sess_for_deletion_lock(fcport); + qlt_schedule_sess_for_deletion(fcport); break; } } else { diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index a64f67a..b21878a 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -3869,7 +3869,7 @@ qla2x00_mark_all_devices_lost(scsi_qla_host_t *vha, int defer) list_for_each_entry(fcport, &vha->vp_fcports, list) { fcport->scan_state = 0; - qlt_schedule_sess_for_deletion_lock(fcport); + qlt_schedule_sess_for_deletion(fcport); if (vha->vp_idx != 0 && vha->vp_idx != fcport->vha->vp_idx) continue; @@ -4897,8 +4897,7 @@ void qla24xx_create_new_sess(struct scsi_qla_host *vha, struct qla_work_evt *e) default: fcport->login_pause = 1; tfcp->conflict = fcport; - qlt_schedule_sess_for_deletion_lock - (tfcp); + qlt_schedule_sess_for_deletion(tfcp); break; } } diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 867d089..72b452d 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -1214,6 +1214,7 @@ static void qla24xx_chk_fcp_state(struct fc_port *sess) void qlt_schedule_sess_for_deletion(struct fc_port *sess) { struct qla_tgt *tgt = sess->tgt; + unsigned long flags; if (sess->disc_state == DSC_DELETE_PEND) return; @@ -1229,12 +1230,19 @@ void qlt_schedule_sess_for_deletion(struct fc_port *sess) return; } - sess->disc_state = DSC_DELETE_PEND; - if (sess->deleted == QLA_SESS_DELETED) sess->logout_on_delete = 0; + spin_lock_irqsave(&sess->vha->work_lock, flags); + if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { + spin_unlock_irqrestore(&sess->vha->work_lock, flags); + return; + } sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; + spin_unlock_irqrestore(&sess->vha->work_lock, flags); + + sess->disc_state = DSC_DELETE_PEND; + qla24xx_chk_fcp_state(sess); ql_dbg(ql_dbg_tgt, sess->vha, 0xe001, @@ -1246,15 +1254,6 @@ void qlt_schedule_sess_for_deletion(struct fc_port *sess) queue_work(sess->vha->hw->wq, &sess->del_work); } -void qlt_schedule_sess_for_deletion_lock(struct fc_port *sess) -{ - unsigned long flags; - struct qla_hw_data *ha = sess->vha->hw; - spin_lock_irqsave(&ha->tgt.sess_lock, flags); - qlt_schedule_sess_for_deletion(sess); - spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); -} - /* ha->tgt.sess_lock supposed to be held on entry */ static void qlt_clear_tgt_db(struct qla_tgt *tgt) { @@ -2210,7 +2209,7 @@ void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) "TM response logo %phC status %#x state %#x", mcmd->sess->port_name, mcmd->fc_tm_rsp, mcmd->flags); - qlt_schedule_sess_for_deletion_lock(mcmd->sess); + qlt_schedule_sess_for_deletion(mcmd->sess); } else { qlt_send_notify_ack(vha->hw->base_qpair, &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0); @@ -3905,7 +3904,7 @@ static void qlt_do_ctio_completion(struct scsi_qla_host *vha, "%s %d %8phC post del sess\n", __func__, __LINE__, cmd->sess->port_name); - qlt_schedule_sess_for_deletion_lock(cmd->sess); + qlt_schedule_sess_for_deletion(cmd->sess); } break; } @@ -4723,7 +4722,7 @@ static int qlt_handle_login(struct scsi_qla_host *vha, __func__, __LINE__, sess->port_name); - qlt_schedule_sess_for_deletion_lock(sess); + qlt_schedule_sess_for_deletion(sess); break; } out: @@ -4951,7 +4950,7 @@ static int qlt_24xx_handle_els(struct scsi_qla_host *vha, } else { /* cmd did not go to upper layer. */ if (sess) { - qlt_schedule_sess_for_deletion_lock(sess); + qlt_schedule_sess_for_deletion(sess); res = 0; } /* else logo will be ack */ -- 2.7.4