Merge tag 'nvme-5.11-2021-01-07' of git://git.infradead.org/nvme into block-5.11

Pull NVMe updates from Christoph:

"nvme updates for 5.11:

 - fix a race in the nvme-tcp send code (Sagi Grimberg)
 - fix a list corruption in an nvme-rdma error path (Israel Rukshin)
 - avoid a possible double fetch in nvme-pci (Lalithambika Krishnakumar)
 - add the susystem NQN quirk for a Samsung driver (Gopal Tiwari)
 - fix two compiler warnings in nvme-fcloop (James Smart)
 - don't call sleeping functions from irq context in nvme-fc (James Smart)
 - remove an unused argument (Max Gurtovoy)
 - remove unused exports (Minwoo Im)"

* tag 'nvme-5.11-2021-01-07' of git://git.infradead.org/nvme:
  nvme: remove the unused status argument from nvme_trace_bio_complete
  nvmet-rdma: Fix list_del corruption on queue establishment failure
  nvme: unexport functions with no external caller
  nvme: avoid possible double fetch in handling CQE
  nvme-tcp: Fix possible race of io_work and direct send
  nvme-pci: mark Samsung PM1725a as IGNORE_DEV_SUBNQN
  nvme-fcloop: Fix sscanf type and list_first_entry_or_null warnings
  nvme-fc: avoid calling _nvme_fc_abort_outstanding_ios from interrupt context

drivers/nvme/host/core.c

@@ -179,7 +179,7 @@ int nvme_reset_ctrl(struct nvme_ctrl *ctrl)
 }
 EXPORT_SYMBOL_GPL(nvme_reset_ctrl);
 
-int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl)
+static int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl)
 {
 	int ret;
 
@@ -192,7 +192,6 @@ int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl)
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(nvme_reset_ctrl_sync);
 
 static void nvme_do_delete_ctrl(struct nvme_ctrl *ctrl)
 {
@@ -331,7 +330,7 @@ static inline void nvme_end_req(struct request *req)
 		req->__sector = nvme_lba_to_sect(req->q->queuedata,
 			le64_to_cpu(nvme_req(req)->result.u64));
 
-	nvme_trace_bio_complete(req, status);
+	nvme_trace_bio_complete(req);
 	blk_mq_end_request(req, status);
 }
 
@@ -578,7 +577,7 @@ struct request *nvme_alloc_request(struct request_queue *q,
 }
 EXPORT_SYMBOL_GPL(nvme_alloc_request);
 
-struct request *nvme_alloc_request_qid(struct request_queue *q,
+static struct request *nvme_alloc_request_qid(struct request_queue *q,
 		struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid)
 {
 	struct request *req;
@@ -589,7 +588,6 @@ struct request *nvme_alloc_request_qid(struct request_queue *q,
 		nvme_init_request(req, cmd);
 	return req;
 }
-EXPORT_SYMBOL_GPL(nvme_alloc_request_qid);
 
 static int nvme_toggle_streams(struct nvme_ctrl *ctrl, bool enable)
 {

drivers/nvme/host/fc.c

@@ -166,6 +166,7 @@ struct nvme_fc_ctrl {
 	struct blk_mq_tag_set	admin_tag_set;
 	struct blk_mq_tag_set	tag_set;
 
+	struct work_struct	ioerr_work;
 	struct delayed_work	connect_work;
 
 	struct kref		ref;
@@ -1888,6 +1889,15 @@ __nvme_fc_fcpop_chk_teardowns(struct nvme_fc_ctrl *ctrl,
 	}
 }
 
+static void
+nvme_fc_ctrl_ioerr_work(struct work_struct *work)
+{
+	struct nvme_fc_ctrl *ctrl =
+			container_of(work, struct nvme_fc_ctrl, ioerr_work);
+
+	nvme_fc_error_recovery(ctrl, "transport detected io error");
+}
+
 static void
 nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
 {
@@ -2046,7 +2056,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
 
 check_error:
 	if (terminate_assoc)
-		nvme_fc_error_recovery(ctrl, "transport detected io error");
+		queue_work(nvme_reset_wq, &ctrl->ioerr_work);
 }
 
 static int
@@ -3233,6 +3243,7 @@ nvme_fc_delete_ctrl(struct nvme_ctrl *nctrl)
 {
 	struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl);
 
+	cancel_work_sync(&ctrl->ioerr_work);
 	cancel_delayed_work_sync(&ctrl->connect_work);
 	/*
 	 * kill the association on the link side.  this will block
@@ -3449,6 +3460,7 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
 
 	INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work);
 	INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work);
+	INIT_WORK(&ctrl->ioerr_work, nvme_fc_ctrl_ioerr_work);
 	spin_lock_init(&ctrl->lock);
 
 	/* io queue count */
@@ -3540,6 +3552,7 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
 
 fail_ctrl:
 	nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING);
+	cancel_work_sync(&ctrl->ioerr_work);
 	cancel_work_sync(&ctrl->ctrl.reset_work);
 	cancel_delayed_work_sync(&ctrl->connect_work);
 

drivers/nvme/host/nvme.h

@@ -610,8 +610,6 @@ void nvme_start_freeze(struct nvme_ctrl *ctrl);
 #define NVME_QID_ANY -1
 struct request *nvme_alloc_request(struct request_queue *q,
 		struct nvme_command *cmd, blk_mq_req_flags_t flags);
-struct request *nvme_alloc_request_qid(struct request_queue *q,
-		struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid);
 void nvme_cleanup_cmd(struct request *req);
 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
 		struct nvme_command *cmd);
@@ -630,7 +628,6 @@ int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
-int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
 
@@ -675,8 +672,7 @@ static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
 		kblockd_schedule_work(&head->requeue_work);
 }
 
-static inline void nvme_trace_bio_complete(struct request *req,
-        blk_status_t status)
+static inline void nvme_trace_bio_complete(struct request *req)
 {
 	struct nvme_ns *ns = req->q->queuedata;
 
@@ -731,8 +727,7 @@ static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
 {
 }
-static inline void nvme_trace_bio_complete(struct request *req,
-        blk_status_t status)
+static inline void nvme_trace_bio_complete(struct request *req)
 {
 }
 static inline int nvme_mpath_init(struct nvme_ctrl *ctrl,

drivers/nvme/host/pci.c

@@ -967,6 +967,7 @@ static inline struct blk_mq_tags *nvme_queue_tagset(struct nvme_queue *nvmeq)
 static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, u16 idx)
 {
 	struct nvme_completion *cqe = &nvmeq->cqes[idx];
+	__u16 command_id = READ_ONCE(cqe->command_id);
 	struct request *req;
 
 	/*
@@ -975,17 +976,17 @@ static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, u16 idx)
 	 * aborts.  We don't even bother to allocate a struct request
 	 * for them but rather special case them here.
 	 */
-	if (unlikely(nvme_is_aen_req(nvmeq->qid, cqe->command_id))) {
+	if (unlikely(nvme_is_aen_req(nvmeq->qid, command_id))) {
 		nvme_complete_async_event(&nvmeq->dev->ctrl,
 				cqe->status, &cqe->result);
 		return;
 	}
 
-	req = blk_mq_tag_to_rq(nvme_queue_tagset(nvmeq), cqe->command_id);
+	req = blk_mq_tag_to_rq(nvme_queue_tagset(nvmeq), command_id);
 	if (unlikely(!req)) {
 		dev_warn(nvmeq->dev->ctrl.device,
 			"invalid id %d completed on queue %d\n",
-			cqe->command_id, le16_to_cpu(cqe->sq_id));
+			command_id, le16_to_cpu(cqe->sq_id));
 		return;
 	}
 
@@ -3196,7 +3197,8 @@ static const struct pci_device_id nvme_id_table[] = {
 	{ PCI_DEVICE(0x144d, 0xa821),   /* Samsung PM1725 */
 		.driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, },
 	{ PCI_DEVICE(0x144d, 0xa822),   /* Samsung PM1725a */
-		.driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, },
+		.driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY |
+				NVME_QUIRK_IGNORE_DEV_SUBNQN, },
 	{ PCI_DEVICE(0x1d1d, 0x1f1f),	/* LighNVM qemu device */
 		.driver_data = NVME_QUIRK_LIGHTNVM, },
 	{ PCI_DEVICE(0x1d1d, 0x2807),	/* CNEX WL */

drivers/nvme/host/tcp.c

@@ -262,6 +262,16 @@ static inline void nvme_tcp_advance_req(struct nvme_tcp_request *req,
 	}
 }
 
+static inline void nvme_tcp_send_all(struct nvme_tcp_queue *queue)
+{
+	int ret;
+
+	/* drain the send queue as much as we can... */
+	do {
+		ret = nvme_tcp_try_send(queue);
+	} while (ret > 0);
+}
+
 static inline void nvme_tcp_queue_request(struct nvme_tcp_request *req,
 		bool sync, bool last)
 {
@@ -279,7 +289,7 @@ static inline void nvme_tcp_queue_request(struct nvme_tcp_request *req,
 	if (queue->io_cpu == smp_processor_id() &&
 	    sync && empty && mutex_trylock(&queue->send_mutex)) {
 		queue->more_requests = !last;
-		nvme_tcp_try_send(queue);
+		nvme_tcp_send_all(queue);
 		queue->more_requests = false;
 		mutex_unlock(&queue->send_mutex);
 	} else if (last) {

drivers/nvme/target/fcloop.c

@@ -1501,7 +1501,8 @@ static ssize_t
 fcloop_set_cmd_drop(struct device *dev, struct device_attribute *attr,
 		const char *buf, size_t count)
 {
-	int opcode, starting, amount;
+	unsigned int opcode;
+	int starting, amount;
 
 	if (sscanf(buf, "%x:%d:%d", &opcode, &starting, &amount) != 3)
 		return -EBADRQC;
@@ -1588,8 +1589,8 @@ static int __init fcloop_init(void)
 
 static void __exit fcloop_exit(void)
 {
-	struct fcloop_lport *lport;
-	struct fcloop_nport *nport;
+	struct fcloop_lport *lport = NULL;
+	struct fcloop_nport *nport = NULL;
 	struct fcloop_tport *tport;
 	struct fcloop_rport *rport;
 	unsigned long flags;

drivers/nvme/target/rdma.c

@@ -1641,6 +1641,16 @@ static void __nvmet_rdma_queue_disconnect(struct nvmet_rdma_queue *queue)
 	spin_lock_irqsave(&queue->state_lock, flags);
 	switch (queue->state) {
 	case NVMET_RDMA_Q_CONNECTING:
+		while (!list_empty(&queue->rsp_wait_list)) {
+			struct nvmet_rdma_rsp *rsp;
+
+			rsp = list_first_entry(&queue->rsp_wait_list,
+					       struct nvmet_rdma_rsp,
+					       wait_list);
+			list_del(&rsp->wait_list);
+			nvmet_rdma_put_rsp(rsp);
+		}
+		fallthrough;
 	case NVMET_RDMA_Q_LIVE:
 		queue->state = NVMET_RDMA_Q_DISCONNECTING;
 		disconnect = true;