From 14385de117882fa253954063d8b8d8a6bdeae650 Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Thu, 25 Apr 2013 14:39:27 -0600 Subject: [PATCH] NVMe: queue usage fixes in nvme-scsi Fixes nvme queue usages in scsi-to-nvme translation code to not get a queue more often than it is being put, and not use the queue in an unsafe way without it being locked. Signed-off-by: Keith Busch Acked-by: Vishal Verma Signed-off-by: Matthew Wilcox --- drivers/block/nvme-scsi.c | 25 ++++++++++++++++++++----- 1 file changed, 20 insertions(+), 5 deletions(-) diff --git a/drivers/block/nvme-scsi.c b/drivers/block/nvme-scsi.c index bbfb2883f05a..fe2fcfff4c0f 100644 --- a/drivers/block/nvme-scsi.c +++ b/drivers/block/nvme-scsi.c @@ -2039,7 +2039,7 @@ static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, int res = SNTI_TRANSLATION_SUCCESS; int nvme_sc; struct nvme_dev *dev = ns->dev; - struct nvme_queue *nvmeq = get_nvmeq(ns->dev); + struct nvme_queue *nvmeq; u32 num_cmds; struct nvme_iod *iod; u64 unit_len; @@ -2653,7 +2653,8 @@ static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr, { int res = SNTI_TRANSLATION_SUCCESS; int nvme_sc; - struct nvme_queue *nvmeq = get_nvmeq(ns->dev); + struct nvme_queue *nvmeq; + struct nvme_command c; u8 immed, pcmod, pc, no_flush, start; immed = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_IMMED_OFFSET); @@ -2675,8 +2676,14 @@ static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr, } else { if (no_flush == 0) { /* Issue NVME FLUSH command prior to START STOP UNIT */ - nvme_sc = nvme_submit_flush_data(nvmeq, ns); + memset(&c, 0, sizeof(c)); + c.common.opcode = nvme_cmd_flush; + c.common.nsid = cpu_to_le32(ns->ns_id); + + nvmeq = get_nvmeq(ns->dev); put_nvmeq(nvmeq); + nvme_sc = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); + res = nvme_trans_status_code(hdr, nvme_sc); if (res) goto out; @@ -2698,9 +2705,17 @@ static int nvme_trans_synchronize_cache(struct nvme_ns *ns, { int res = SNTI_TRANSLATION_SUCCESS; int nvme_sc; - struct nvme_queue *nvmeq = get_nvmeq(ns->dev); + struct nvme_command c; + struct nvme_queue *nvmeq; + + memset(&c, 0, sizeof(c)); + c.common.opcode = nvme_cmd_flush; + c.common.nsid = cpu_to_le32(ns->ns_id); + + nvmeq = get_nvmeq(ns->dev); put_nvmeq(nvmeq); - nvme_sc = nvme_submit_flush_data(nvmeq, ns); + nvme_sc = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); + res = nvme_trans_status_code(hdr, nvme_sc); if (res) goto out; -- 2.11.0