From 7108b76e87e9a31099f5d4ac0aed6c3b77dce728 Mon Sep 17 00:00:00 2001 From: Chad Dupuis Date: Fri, 11 Apr 2014 16:54:45 -0400 Subject: [PATCH] qla2xxx: Do logins from a chip reset in DPC thread instead of the error handler thread. Attempting to do any logins from the SCSI reset handler can lead to a deadlock scenario if a rport times out and the FC transport layer. Move doing any port logins to the DPC thread so as not to impede the progress of the SCSI error handler thread and avoid deadlock situations. Signed-off-by: Chad Dupuis Signed-off-by: Saurav Kashyap Signed-off-by: Christoph Hellwig --- drivers/scsi/qla2xxx/qla_dbg.c | 6 +++-- drivers/scsi/qla2xxx/qla_init.c | 40 +++------------------------------ 2 files changed, 7 insertions(+), 39 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c index 781ca5b0936..96f7d710266 100644 --- a/drivers/scsi/qla2xxx/qla_dbg.c +++ b/drivers/scsi/qla2xxx/qla_dbg.c @@ -45,8 +45,10 @@ * | | | 0x70ad-0x70ae | * | | | 0x70d7-0x70db | * | | | 0x70de-0x70df | - * | Task Management | 0x803d | 0x8025-0x8026 | - * | | | 0x800b,0x8039 | + * | Task Management | 0x803d | 0x8000,0x800b | + * | | | 0x8025,0x8026 | + * | | | 0x8031,0x8032 | + * | | | 0x8039,0x803c | * | AER/EEH | 0x9011 | | * | Virtual Port | 0xa007 | | * | ISP82XX Specific | 0xb157 | 0xb002,0xb024 | diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 20b569e9334..e2184412617 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -4736,7 +4736,6 @@ static int qla2x00_restart_isp(scsi_qla_host_t *vha) { int status = 0; - uint32_t wait_time; struct qla_hw_data *ha = vha->hw; struct req_que *req = ha->req_q_map[0]; struct rsp_que *rsp = ha->rsp_q_map[0]; @@ -4753,14 +4752,12 @@ qla2x00_restart_isp(scsi_qla_host_t *vha) if (!status && !(status = qla2x00_init_rings(vha))) { clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags); ha->flags.chip_reset_done = 1; + /* Initialize the queues in use */ qla25xx_init_queues(ha); status = qla2x00_fw_ready(vha); if (!status) { - ql_dbg(ql_dbg_taskm, vha, 0x8031, - "Start configure loop status = %d.\n", status); - /* Issue a marker after FW becomes ready. */ qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL); @@ -4775,24 +4772,12 @@ qla2x00_restart_isp(scsi_qla_host_t *vha) qlt_24xx_process_atio_queue(vha); spin_unlock_irqrestore(&ha->hardware_lock, flags); - /* Wait at most MAX_TARGET RSCNs for a stable link. */ - wait_time = 256; - do { - clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); - qla2x00_configure_loop(vha); - wait_time--; - } while (!atomic_read(&vha->loop_down_timer) && - !(test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags)) - && wait_time && (test_bit(LOOP_RESYNC_NEEDED, - &vha->dpc_flags))); + set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); } /* if no cable then assume it's good */ if ((vha->device_flags & DFLG_NO_CABLE)) status = 0; - - ql_dbg(ql_dbg_taskm, vha, 0x8032, - "Configure loop done, status = 0x%x.\n", status); } return (status); } @@ -6139,7 +6124,6 @@ int qla82xx_restart_isp(scsi_qla_host_t *vha) { int status, rval; - uint32_t wait_time; struct qla_hw_data *ha = vha->hw; struct req_que *req = ha->req_q_map[0]; struct rsp_que *rsp = ha->rsp_q_map[0]; @@ -6153,31 +6137,15 @@ qla82xx_restart_isp(scsi_qla_host_t *vha) status = qla2x00_fw_ready(vha); if (!status) { - ql_log(ql_log_info, vha, 0x803c, - "Start configure loop, status =%d.\n", status); - /* Issue a marker after FW becomes ready. */ qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL); - vha->flags.online = 1; - /* Wait at most MAX_TARGET RSCNs for a stable link. */ - wait_time = 256; - do { - clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); - qla2x00_configure_loop(vha); - wait_time--; - } while (!atomic_read(&vha->loop_down_timer) && - !(test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags)) && - wait_time && - (test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags))); + set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); } /* if no cable then assume it's good */ if ((vha->device_flags & DFLG_NO_CABLE)) status = 0; - - ql_log(ql_log_info, vha, 0x8000, - "Configure loop done, status = 0x%x.\n", status); } if (!status) { @@ -6191,8 +6159,6 @@ qla82xx_restart_isp(scsi_qla_host_t *vha) vha->marker_needed = 1; } - vha->flags.online = 1; - ha->isp_ops->enable_intrs(ha); ha->isp_abort_cnt = 0; -- 2.46.0