From c60ac21930d780e2c4fbd3fdff20744a1093c0c5 Mon Sep 17 00:00:00 2001 From: Gleb Chesnokov Date: Fri, 25 Mar 2022 16:50:34 +0300 Subject: [PATCH] qla2x00t-32gbit: Fix loss of NVMe namespaces after driver reload test Driver registration of localport can race when it happens at the remote port discovery time. Fix this by calling the registration under a mutex. Link: https://lore.kernel.org/r/20220310092604.22950-4-njavali@marvell.com Fixes: e84067d74301 ("scsi: qla2xxx: Add FC-NVMe F/W initialization and transport registration") Cc: stable@vger.kernel.org Reported-by: Marco Patalano Tested-by: Marco Patalano Reviewed-by: Himanshu Madhani Signed-off-by: Arun Easi Signed-off-by: Nilesh Javali Signed-off-by: Martin K. Petersen [ commit db212f2eb3fb upstream ] --- qla2x00t-32gbit/qla_nvme.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/qla2x00t-32gbit/qla_nvme.c b/qla2x00t-32gbit/qla_nvme.c index 8378bd4e6..b31036a02 100644 --- a/qla2x00t-32gbit/qla_nvme.c +++ b/qla2x00t-32gbit/qla_nvme.c @@ -806,8 +806,6 @@ int qla_nvme_register_hba(struct scsi_qla_host *vha) ha = vha->hw; tmpl = &qla_nvme_fc_transport; - WARN_ON(vha->nvme_local_port); - if (ql2xnvme_queues < MIN_NVME_HW_QUEUES || ql2xnvme_queues > MAX_NVME_HW_QUEUES) { ql_log(ql_log_warn, vha, 0xfffd, "ql2xnvme_queues=%d is out of range(MIN:%d - MAX:%d). Resetting ql2xnvme_queues to:%d\n", @@ -821,7 +819,7 @@ int qla_nvme_register_hba(struct scsi_qla_host *vha) (uint8_t)(ha->max_qpairs ? ha->max_qpairs : 1)); ql_log(ql_log_info, vha, 0xfffb, - "Number of NVME queues used for this port: %d\n", + "Number of NVME queues used for this port: %d\n", qla_nvme_fc_transport.max_hw_queues); @@ -830,13 +828,25 @@ int qla_nvme_register_hba(struct scsi_qla_host *vha) pinfo.port_role = FC_PORT_ROLE_NVME_INITIATOR; pinfo.port_id = vha->d_id.b24; - ql_log(ql_log_info, vha, 0xffff, - "register_localport: host-traddr=nn-0x%llx:pn-0x%llx on portID:%x\n", - pinfo.node_name, pinfo.port_name, pinfo.port_id); - qla_nvme_fc_transport.dma_boundary = vha->host->dma_boundary; + mutex_lock(&ha->vport_lock); + /* + * Check again for nvme_local_port to see if any other thread raced + * with this one and finished registration. + */ + if (!vha->nvme_local_port) { + ql_log(ql_log_info, vha, 0xffff, + "register_localport: host-traddr=nn-0x%llx:pn-0x%llx on portID:%x\n", + pinfo.node_name, pinfo.port_name, pinfo.port_id); + qla_nvme_fc_transport.dma_boundary = vha->host->dma_boundary; - ret = nvme_fc_register_localport(&pinfo, tmpl, - get_device(&ha->pdev->dev), &vha->nvme_local_port); + ret = nvme_fc_register_localport(&pinfo, tmpl, + get_device(&ha->pdev->dev), + &vha->nvme_local_port); + mutex_unlock(&ha->vport_lock); + } else { + mutex_unlock(&ha->vport_lock); + return 0; + } if (ret) { ql_log(ql_log_warn, vha, 0xffff, "register_localport failed: ret=%x\n", ret);