From eee417b0697827a6e120199b126b447af3c81b47 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 26 Nov 2015 13:03:13 +0100 Subject: [PATCH] nvme: properly free resources for cancelled command We need to move freeing of resources to the ->complete handler to ensure they are also freed when we cancel the command. Signed-off-by: Christoph Hellwig Acked-by: Keith Busch Signed-off-by: Jens Axboe --- drivers/nvme/host/pci.c | 79 +++++++++++++++++++++-------------------- 1 file changed, 40 insertions(+), 39 deletions(-) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 84ac46fc9873..ec768b64ab77 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -82,11 +82,9 @@ static wait_queue_head_t nvme_kthread_wait; struct nvme_dev; struct nvme_queue; -struct nvme_iod; static int nvme_reset(struct nvme_dev *dev); static void nvme_process_cq(struct nvme_queue *nvmeq); -static void nvme_unmap_data(struct nvme_dev *dev, struct nvme_iod *iod); static void nvme_remove_dead_ctrl(struct nvme_dev *dev); static void nvme_dev_shutdown(struct nvme_dev *dev); @@ -491,41 +489,6 @@ static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi) } #endif -static void req_completion(struct nvme_queue *nvmeq, struct nvme_completion *cqe) -{ - struct request *req = blk_mq_tag_to_rq(*nvmeq->tags, cqe->command_id); - struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req); - struct nvme_iod *iod = cmd_rq->iod; - u16 status = le16_to_cpup(&cqe->status) >> 1; - int error = 0; - - if (unlikely(status)) { - if (nvme_req_needs_retry(req, status)) { - nvme_unmap_data(nvmeq->dev, iod); - nvme_requeue_req(req); - return; - } - - if (req->cmd_type == REQ_TYPE_DRV_PRIV) - error = status; - else - error = nvme_error_status(status); - } - - if (req->cmd_type == REQ_TYPE_DRV_PRIV) { - u32 result = le32_to_cpup(&cqe->result); - req->special = (void *)(uintptr_t)result; - } - - if (cmd_rq->aborted) - dev_warn(nvmeq->dev->dev, - "completing aborted command with status:%04x\n", - error); - - nvme_unmap_data(nvmeq->dev, iod); - blk_mq_complete_request(req, error); -} - static bool nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, int total_len) { @@ -726,7 +689,7 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx, if (ns && ns->ms && !blk_integrity_rq(req)) { if (!(ns->pi_type && ns->ms == 8) && req->cmd_type != REQ_TYPE_DRV_PRIV) { - blk_mq_complete_request(req, -EFAULT); + blk_mq_end_request(req, -EFAULT); return BLK_MQ_RQ_QUEUE_OK; } } @@ -767,6 +730,35 @@ out: return ret; } +static void nvme_complete_rq(struct request *req) +{ + struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req); + struct nvme_dev *dev = cmd->nvmeq->dev; + int error = 0; + + nvme_unmap_data(dev, cmd->iod); + + if (unlikely(req->errors)) { + if (nvme_req_needs_retry(req, req->errors)) { + nvme_requeue_req(req); + return; + } + + if (req->cmd_type == REQ_TYPE_DRV_PRIV) + error = req->errors; + else + error = nvme_error_status(req->errors); + } + + if (unlikely(cmd->aborted)) { + dev_warn(dev->dev, + "completing aborted command with status: %04x\n", + req->errors); + } + + blk_mq_end_request(req, error); +} + static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) { u16 head, phase; @@ -777,6 +769,7 @@ static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) for (;;) { struct nvme_completion cqe = nvmeq->cqes[head]; u16 status = le16_to_cpu(cqe.status); + struct request *req; if ((status & 1) != phase) break; @@ -808,7 +801,13 @@ static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) continue; } - req_completion(nvmeq, &cqe); + req = blk_mq_tag_to_rq(*nvmeq->tags, cqe.command_id); + if (req->cmd_type == REQ_TYPE_DRV_PRIV) { + u32 result = le32_to_cpu(cqe.result); + req->special = (void *)(uintptr_t)result; + } + blk_mq_complete_request(req, status >> 1); + } /* If the controller ignores the cq head doorbell and continuously @@ -1278,6 +1277,7 @@ static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) static struct blk_mq_ops nvme_mq_admin_ops = { .queue_rq = nvme_queue_rq, + .complete = nvme_complete_rq, .map_queue = blk_mq_map_queue, .init_hctx = nvme_admin_init_hctx, .exit_hctx = nvme_admin_exit_hctx, @@ -1287,6 +1287,7 @@ static struct blk_mq_ops nvme_mq_admin_ops = { static struct blk_mq_ops nvme_mq_ops = { .queue_rq = nvme_queue_rq, + .complete = nvme_complete_rq, .map_queue = blk_mq_map_queue, .init_hctx = nvme_init_hctx, .init_request = nvme_init_request, -- 2.20.1