Merge tag 'for-5.13/drivers-2021-04-27' of git://git.kernel.dk/linux-block

Pull block driver updates from Jens Axboe:

 - MD changes via Song:
        - raid5 POWER fix
        - raid1 failure fix
        - UAF fix for md cluster
        - mddev_find_or_alloc() clean up
        - Fix NULL pointer deref with external bitmap
        - Performance improvement for raid10 discard requests
        - Fix missing information of /proc/mdstat

 - rsxx const qualifier removal (Arnd)

 - Expose allocated brd pages (Calvin)

 - rnbd via Gioh Kim:
        - Change maintainer
        - Change domain address of maintainers' email
        - Add polling IO mode and document update
        - Fix memory leak and some bug detected by static code analysis
          tools
        - Code refactoring

 - Series of floppy cleanups/fixes (Denis)

 - s390 dasd fixes (Julian)

 - kerneldoc fixes (Lee)

 - null_blk double free (Lv)

 - null_blk virtual boundary addition (Max)

 - Remove xsysace driver (Michal)

 - umem driver removal (Davidlohr)

 - ataflop fixes (Dan)

 - Revalidate disk removal (Christoph)

 - Bounce buffer cleanups (Christoph)

 - Mark lightnvm as deprecated (Christoph)

 - mtip32xx init cleanups (Shixin)

 - Various fixes (Tian, Gustavo, Coly, Yang, Zhang, Zhiqiang)

* tag 'for-5.13/drivers-2021-04-27' of git://git.kernel.dk/linux-block: (143 commits)
  async_xor: increase src_offs when dropping destination page
  drivers/block/null_blk/main: Fix a double free in null_init.
  md/raid1: properly indicate failure when ending a failed write request
  md-cluster: fix use-after-free issue when removing rdev
  nvme: introduce generic per-namespace chardev
  nvme: cleanup nvme_configure_apst
  nvme: do not try to reconfigure APST when the controller is not live
  nvme: add 'kato' sysfs attribute
  nvme: sanitize KATO setting
  nvmet: avoid queuing keep-alive timer if it is disabled
  brd: expose number of allocated pages in debugfs
  ataflop: fix off by one in ataflop_probe()
  ataflop: potential out of bounds in do_format()
  drbd: Fix fall-through warnings for Clang
  block/rnbd: Use strscpy instead of strlcpy
  block/rnbd-clt-sysfs: Remove copy buffer overlap in rnbd_clt_get_path_name
  block/rnbd-clt: Remove max_segment_size
  block/rnbd-clt: Generate kobject_uevent when the rnbd device state changes
  block/rnbd-srv: Remove unused arguments of rnbd_srv_rdma_ev
  Documentation/ABI/rnbd-clt: Add description for nr_poll_queues
  ...

9 files changed, 167 insertions, 80 deletions

diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index fe6b8aa90b53..d2a26ff3f7b3 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -513,7 +513,7 @@ static void nvmet_execute_identify_ns(struct nvmet_req *req)
 	default:
 		id->nuse = id->nsze;
 		break;
-        }
+	}
 
 	if (req->ns->bdev)
 		nvmet_bdev_set_limits(req->ns->bdev, id);
@@ -919,15 +919,21 @@ void nvmet_execute_async_event(struct nvmet_req *req)
 void nvmet_execute_keep_alive(struct nvmet_req *req)
 {
 	struct nvmet_ctrl *ctrl = req->sq->ctrl;
+	u16 status = 0;
 
 	if (!nvmet_check_transfer_len(req, 0))
 		return;
 
+	if (!ctrl->kato) {
+		status = NVME_SC_KA_TIMEOUT_INVALID;
+		goto out;
+	}
+
 	pr_debug("ctrl %d update keep-alive timer for %d secs\n",
 		ctrl->cntlid, ctrl->kato);
-
 	mod_delayed_work(system_wq, &ctrl->ka_work, ctrl->kato * HZ);
-	nvmet_req_complete(req, 0);
+out:
+	nvmet_req_complete(req, status);
 }
 
 u16 nvmet_parse_admin_cmd(struct nvmet_req *req)
@@ -940,7 +946,7 @@ u16 nvmet_parse_admin_cmd(struct nvmet_req *req)
 	if (nvmet_req_subsys(req)->type == NVME_NQN_DISC)
 		return nvmet_parse_discovery_cmd(req);
 
-	ret = nvmet_check_ctrl_status(req, cmd);
+	ret = nvmet_check_ctrl_status(req);
 	if (unlikely(ret))
 		return ret;
 
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index e5dbd1923b7b..65a0cf99f557 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -1149,6 +1149,12 @@ static ssize_t nvmet_subsys_attr_model_store_locked(struct nvmet_subsys *subsys,
 	if (!len)
 		return -EINVAL;
 
+	if (len > NVMET_MN_MAX_SIZE) {
+		pr_err("Model number size can not exceed %d Bytes\n",
+		       NVMET_MN_MAX_SIZE);
+		return -EINVAL;
+	}
+
 	for (pos = 0; pos < len; pos++) {
 		if (!nvmet_is_ascii(page[pos]))
 			return -EINVAL;
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index a027433b8be8..25cc2ee8de3f 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -864,10 +864,9 @@ static inline u16 nvmet_io_cmd_check_access(struct nvmet_req *req)
 
 static u16 nvmet_parse_io_cmd(struct nvmet_req *req)
 {
-	struct nvme_command *cmd = req->cmd;
 	u16 ret;
 
-	ret = nvmet_check_ctrl_status(req, cmd);
+	ret = nvmet_check_ctrl_status(req);
 	if (unlikely(ret))
 		return ret;
 
@@ -1190,19 +1189,19 @@ static void nvmet_init_cap(struct nvmet_ctrl *ctrl)
 	ctrl->cap |= NVMET_QUEUE_SIZE - 1;
 }
 
-u16 nvmet_ctrl_find_get(const char *subsysnqn, const char *hostnqn, u16 cntlid,
-		struct nvmet_req *req, struct nvmet_ctrl **ret)
+struct nvmet_ctrl *nvmet_ctrl_find_get(const char *subsysnqn,
+				       const char *hostnqn, u16 cntlid,
+				       struct nvmet_req *req)
 {
+	struct nvmet_ctrl *ctrl = NULL;
 	struct nvmet_subsys *subsys;
-	struct nvmet_ctrl *ctrl;
-	u16 status = 0;
 
 	subsys = nvmet_find_get_subsys(req->port, subsysnqn);
 	if (!subsys) {
 		pr_warn("connect request for invalid subsystem %s!\n",
 			subsysnqn);
 		req->cqe->result.u32 = IPO_IATTR_CONNECT_DATA(subsysnqn);
-		return NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
+		goto out;
 	}
 
 	mutex_lock(&subsys->lock);
@@ -1215,33 +1214,34 @@ u16 nvmet_ctrl_find_get(const char *subsysnqn, const char *hostnqn, u16 cntlid,
 			if (!kref_get_unless_zero(&ctrl->ref))
 				continue;
 
-			*ret = ctrl;
-			goto out;
+			/* ctrl found */
+			goto found;
 		}
 	}
 
+	ctrl = NULL; /* ctrl not found */
 	pr_warn("could not find controller %d for subsys %s / host %s\n",
 		cntlid, subsysnqn, hostnqn);
 	req->cqe->result.u32 = IPO_IATTR_CONNECT_DATA(cntlid);
-	status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
 
-out:
+found:
 	mutex_unlock(&subsys->lock);
 	nvmet_subsys_put(subsys);
-	return status;
+out:
+	return ctrl;
 }
 
-u16 nvmet_check_ctrl_status(struct nvmet_req *req, struct nvme_command *cmd)
+u16 nvmet_check_ctrl_status(struct nvmet_req *req)
 {
 	if (unlikely(!(req->sq->ctrl->cc & NVME_CC_ENABLE))) {
 		pr_err("got cmd %d while CC.EN == 0 on qid = %d\n",
-		       cmd->common.opcode, req->sq->qid);
+		       req->cmd->common.opcode, req->sq->qid);
 		return NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR;
 	}
 
 	if (unlikely(!(req->sq->ctrl->csts & NVME_CSTS_RDY))) {
 		pr_err("got cmd %d while CSTS.RDY == 0 on qid = %d\n",
-		       cmd->common.opcode, req->sq->qid);
+		       req->cmd->common.opcode, req->sq->qid);
 		return NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR;
 	}
 	return 0;
@@ -1322,10 +1322,10 @@ u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn,
 		pr_warn("connect request for invalid subsystem %s!\n",
 			subsysnqn);
 		req->cqe->result.u32 = IPO_IATTR_CONNECT_DATA(subsysnqn);
+		req->error_loc = offsetof(struct nvme_common_command, dptr);
 		goto out;
 	}
 
-	status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
 	down_read(&nvmet_config_sem);
 	if (!nvmet_host_allowed(subsys, hostnqn)) {
 		pr_info("connect by host %s for subsystem %s not allowed\n",
@@ -1333,6 +1333,7 @@ u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn,
 		req->cqe->result.u32 = IPO_IATTR_CONNECT_DATA(hostnqn);
 		up_read(&nvmet_config_sem);
 		status = NVME_SC_CONNECT_INVALID_HOST | NVME_SC_DNR;
+		req->error_loc = offsetof(struct nvme_common_command, dptr);
 		goto out_put_subsystem;
 	}
 	up_read(&nvmet_config_sem);
diff --git a/drivers/nvme/target/discovery.c b/drivers/nvme/target/discovery.c
index 682854e0e079..4845d12e374a 100644
--- a/drivers/nvme/target/discovery.c
+++ b/drivers/nvme/target/discovery.c
@@ -178,12 +178,14 @@ static void nvmet_execute_disc_get_log_page(struct nvmet_req *req)
 	if (req->cmd->get_log_page.lid != NVME_LOG_DISC) {
 		req->error_loc =
 			offsetof(struct nvme_get_log_page_command, lid);
-		status = NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
+		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
 		goto out;
 	}
 
 	/* Spec requires dword aligned offsets */
 	if (offset & 0x3) {
+		req->error_loc =
+			offsetof(struct nvme_get_log_page_command, lpo);
 		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
 		goto out;
 	}
@@ -250,7 +252,7 @@ static void nvmet_execute_disc_identify(struct nvmet_req *req)
 
 	if (req->cmd->identify.cns != NVME_ID_CNS_CTRL) {
 		req->error_loc = offsetof(struct nvme_identify, cns);
-		status = NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
+		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
 		goto out;
 	}
 
diff --git a/drivers/nvme/target/fabrics-cmd.c b/drivers/nvme/target/fabrics-cmd.c
index 42bd12b8bf00..1420a8e3e0b1 100644
--- a/drivers/nvme/target/fabrics-cmd.c
+++ b/drivers/nvme/target/fabrics-cmd.c
@@ -190,12 +190,8 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req)
 
 	status = nvmet_alloc_ctrl(d->subsysnqn, d->hostnqn, req,
 				  le32_to_cpu(c->kato), &ctrl);
-	if (status) {
-		if (status == (NVME_SC_INVALID_FIELD | NVME_SC_DNR))
-			req->error_loc =
-				offsetof(struct nvme_common_command, opcode);
+	if (status)
 		goto out;
-	}
 
 	ctrl->pi_support = ctrl->port->pi_enable && ctrl->subsys->pi_support;
 
@@ -222,7 +218,7 @@ static void nvmet_execute_io_connect(struct nvmet_req *req)
 {
 	struct nvmf_connect_command *c = &req->cmd->connect;
 	struct nvmf_connect_data *d;
-	struct nvmet_ctrl *ctrl = NULL;
+	struct nvmet_ctrl *ctrl;
 	u16 qid = le16_to_cpu(c->qid);
 	u16 status = 0;
 
@@ -249,11 +245,12 @@ static void nvmet_execute_io_connect(struct nvmet_req *req)
 		goto out;
 	}
 
-	status = nvmet_ctrl_find_get(d->subsysnqn, d->hostnqn,
-				     le16_to_cpu(d->cntlid),
-				     req, &ctrl);
-	if (status)
+	ctrl = nvmet_ctrl_find_get(d->subsysnqn, d->hostnqn,
+				   le16_to_cpu(d->cntlid), req);
+	if (!ctrl) {
+		status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
 		goto out;
+	}
 
 	if (unlikely(qid > ctrl->subsys->max_qid)) {
 		pr_warn("invalid queue id (%d)\n", qid);
diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index d375745fc4ed..19e113240fff 100644
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -1021,60 +1021,75 @@ nvmet_fc_free_hostport(struct nvmet_fc_hostport *hostport)
 }
 
 static struct nvmet_fc_hostport *
+nvmet_fc_match_hostport(struct nvmet_fc_tgtport *tgtport, void *hosthandle)
+{
+	struct nvmet_fc_hostport *host;
+
+	lockdep_assert_held(&tgtport->lock);
+
+	list_for_each_entry(host, &tgtport->host_list, host_list) {
+		if (host->hosthandle == hosthandle && !host->invalid) {
+			if (nvmet_fc_hostport_get(host))
+				return (host);
+		}
+	}
+
+	return NULL;
+}
+
+static struct nvmet_fc_hostport *
 nvmet_fc_alloc_hostport(struct nvmet_fc_tgtport *tgtport, void *hosthandle)
 {
-	struct nvmet_fc_hostport *newhost, *host, *match = NULL;
+	struct nvmet_fc_hostport *newhost, *match = NULL;
 	unsigned long flags;
 
 	/* if LLDD not implemented, leave as NULL */
 	if (!hosthandle)
 		return NULL;
 
-	/* take reference for what will be the newly allocated hostport */
+	/*
+	 * take reference for what will be the newly allocated hostport if
+	 * we end up using a new allocation
+	 */
 	if (!nvmet_fc_tgtport_get(tgtport))
 		return ERR_PTR(-EINVAL);
 
+	spin_lock_irqsave(&tgtport->lock, flags);
+	match = nvmet_fc_match_hostport(tgtport, hosthandle);
+	spin_unlock_irqrestore(&tgtport->lock, flags);
+
+	if (match) {
+		/* no new allocation - release reference */
+		nvmet_fc_tgtport_put(tgtport);
+		return match;
+	}
+
 	newhost = kzalloc(sizeof(*newhost), GFP_KERNEL);
 	if (!newhost) {
-		spin_lock_irqsave(&tgtport->lock, flags);
-		list_for_each_entry(host, &tgtport->host_list, host_list) {
-			if (host->hosthandle == hosthandle && !host->invalid) {
-				if (nvmet_fc_hostport_get(host)) {
-					match = host;
-					break;
-				}
-			}
-		}
-		spin_unlock_irqrestore(&tgtport->lock, flags);
-		/* no allocation - release reference */
+		/* no new allocation - release reference */
 		nvmet_fc_tgtport_put(tgtport);
-		return (match) ? match : ERR_PTR(-ENOMEM);
+		return ERR_PTR(-ENOMEM);
 	}
 
-	newhost->tgtport = tgtport;
-	newhost->hosthandle = hosthandle;
-	INIT_LIST_HEAD(&newhost->host_list);
-	kref_init(&newhost->ref);
-
 	spin_lock_irqsave(&tgtport->lock, flags);
-	list_for_each_entry(host, &tgtport->host_list, host_list) {
-		if (host->hosthandle == hosthandle && !host->invalid) {
-			if (nvmet_fc_hostport_get(host)) {
-				match = host;
-				break;
-			}
-		}
-	}
+	match = nvmet_fc_match_hostport(tgtport, hosthandle);
 	if (match) {
+		/* new allocation not needed */
 		kfree(newhost);
-		newhost = NULL;
-		/* releasing allocation - release reference */
+		newhost = match;
+		/* no new allocation - release reference */
 		nvmet_fc_tgtport_put(tgtport);
-	} else
+	} else {
+		newhost->tgtport = tgtport;
+		newhost->hosthandle = hosthandle;
+		INIT_LIST_HEAD(&newhost->host_list);
+		kref_init(&newhost->ref);
+
 		list_add_tail(&newhost->host_list, &tgtport->host_list);
+	}
 	spin_unlock_irqrestore(&tgtport->lock, flags);
 
-	return (match) ? match : newhost;
+	return newhost;
 }
 
 static void
@@ -1996,6 +2011,7 @@ nvmet_fc_handle_ls_rqst_work(struct work_struct *work)
  *
  * @target_port: pointer to the (registered) target port the LS was
  *              received on.
+ * @hosthandle: pointer to the host specific data, gets stored in iod.
  * @lsrsp:      pointer to a lsrsp structure to be used to reference
  *              the exchange corresponding to the LS.
  * @lsreqbuf:   pointer to the buffer containing the LS Request
diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index 3e189e753bcf..6665da3b634f 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -141,7 +141,7 @@ static blk_status_t nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx,
 	if (!nvmf_check_ready(&queue->ctrl->ctrl, req, queue_ready))
 		return nvmf_fail_nonready_command(&queue->ctrl->ctrl, req);
 
-	ret = nvme_setup_cmd(ns, req, &iod->cmd);
+	ret = nvme_setup_cmd(ns, req);
 	if (ret)
 		return ret;
 
@@ -205,8 +205,10 @@ static int nvme_loop_init_request(struct blk_mq_tag_set *set,
 		unsigned int numa_node)
 {
 	struct nvme_loop_ctrl *ctrl = set->driver_data;
+	struct nvme_loop_iod *iod = blk_mq_rq_to_pdu(req);
 
 	nvme_req(req)->ctrl = &ctrl->ctrl;
+	nvme_req(req)->cmd = &iod->cmd;
 	return nvme_loop_init_iod(ctrl, blk_mq_rq_to_pdu(req),
 			(set == &ctrl->tag_set) ? hctx_idx + 1 : 0);
 }
@@ -396,7 +398,7 @@ static int nvme_loop_configure_admin_queue(struct nvme_loop_ctrl *ctrl)
 
 	blk_mq_unquiesce_queue(ctrl->ctrl.admin_q);
 
-	error = nvme_init_identify(&ctrl->ctrl);
+	error = nvme_init_ctrl_finish(&ctrl->ctrl);
 	if (error)
 		goto out_cleanup_queue;
 
diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
index 4b84edb49f22..5566ed403576 100644
--- a/drivers/nvme/target/nvmet.h
+++ b/drivers/nvme/target/nvmet.h
@@ -27,6 +27,7 @@
 #define NVMET_ERROR_LOG_SLOTS		128
 #define NVMET_NO_ERROR_LOC		((u16)-1)
 #define NVMET_DEFAULT_CTRL_MODEL	"Linux"
+#define NVMET_MN_MAX_SIZE		40
 
 /*
  * Supported optional AENs:
@@ -428,10 +429,11 @@ void nvmet_ctrl_fatal_error(struct nvmet_ctrl *ctrl);
 void nvmet_update_cc(struct nvmet_ctrl *ctrl, u32 new);
 u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn,
 		struct nvmet_req *req, u32 kato, struct nvmet_ctrl **ctrlp);
-u16 nvmet_ctrl_find_get(const char *subsysnqn, const char *hostnqn, u16 cntlid,
-		struct nvmet_req *req, struct nvmet_ctrl **ret);
+struct nvmet_ctrl *nvmet_ctrl_find_get(const char *subsysnqn,
+				       const char *hostnqn, u16 cntlid,
+				       struct nvmet_req *req);
 void nvmet_ctrl_put(struct nvmet_ctrl *ctrl);
-u16 nvmet_check_ctrl_status(struct nvmet_req *req, struct nvme_command *cmd);
+u16 nvmet_check_ctrl_status(struct nvmet_req *req);
 
 struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
 		enum nvme_subsys_type type);
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index d658c6e8263a..f9f34f6caf5e 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c
@@ -29,6 +29,16 @@ static int so_priority;
 module_param(so_priority, int, 0644);
 MODULE_PARM_DESC(so_priority, "nvmet tcp socket optimize priority");
 
+/* Define a time period (in usecs) that io_work() shall sample an activated
+ * queue before determining it to be idle.  This optional module behavior
+ * can enable NIC solutions that support socket optimized packet processing
+ * using advanced interrupt moderation techniques.
+ */
+static int idle_poll_period_usecs;
+module_param(idle_poll_period_usecs, int, 0644);
+MODULE_PARM_DESC(idle_poll_period_usecs,
+		"nvmet tcp io_work poll till idle time period in usecs");
+
 #define NVMET_TCP_RECV_BUDGET		8
 #define NVMET_TCP_SEND_BUDGET		8
 #define NVMET_TCP_IO_WORK_BUDGET	64
@@ -119,6 +129,8 @@ struct nvmet_tcp_queue {
 	struct ahash_request	*snd_hash;
 	struct ahash_request	*rcv_hash;
 
+	unsigned long           poll_end;
+
 	spinlock_t		state_lock;
 	enum nvmet_tcp_queue_state state;
 
@@ -525,11 +537,36 @@ static void nvmet_tcp_queue_response(struct nvmet_req *req)
 	struct nvmet_tcp_cmd *cmd =
 		container_of(req, struct nvmet_tcp_cmd, req);
 	struct nvmet_tcp_queue	*queue = cmd->queue;
+	struct nvme_sgl_desc *sgl;
+	u32 len;
+
+	if (unlikely(cmd == queue->cmd)) {
+		sgl = &cmd->req.cmd->common.dptr.sgl;
+		len = le32_to_cpu(sgl->length);
+
+		/*
+		 * Wait for inline data before processing the response.
+		 * Avoid using helpers, this might happen before
+		 * nvmet_req_init is completed.
+		 */
+		if (queue->rcv_state == NVMET_TCP_RECV_PDU &&
+		    len && len < cmd->req.port->inline_data_size &&
+		    nvme_is_write(cmd->req.cmd))
+			return;
+	}
 
 	llist_add(&cmd->lentry, &queue->resp_list);
 	queue_work_on(queue_cpu(queue), nvmet_tcp_wq, &cmd->queue->io_work);
 }
 
+static void nvmet_tcp_execute_request(struct nvmet_tcp_cmd *cmd)
+{
+	if (unlikely(cmd->flags & NVMET_TCP_F_INIT_FAILED))
+		nvmet_tcp_queue_response(&cmd->req);
+	else
+		cmd->req.execute(&cmd->req);
+}
+
 static int nvmet_try_send_data_pdu(struct nvmet_tcp_cmd *cmd)
 {
 	u8 hdgst = nvmet_tcp_hdgst_len(cmd->queue);
@@ -961,7 +998,7 @@ static int nvmet_tcp_done_recv_pdu(struct nvmet_tcp_queue *queue)
 			le32_to_cpu(req->cmd->common.dptr.sgl.length));
 
 		nvmet_tcp_handle_req_failure(queue, queue->cmd, req);
-		return -EAGAIN;
+		return 0;
 	}
 
 	ret = nvmet_tcp_map_data(queue->cmd);
@@ -1104,10 +1141,8 @@ static int nvmet_tcp_try_recv_data(struct nvmet_tcp_queue *queue)
 		return 0;
 	}
 
-	if (!(cmd->flags & NVMET_TCP_F_INIT_FAILED) &&
-	    cmd->rbytes_done == cmd->req.transfer_len) {
-		cmd->req.execute(&cmd->req);
-	}
+	if (cmd->rbytes_done == cmd->req.transfer_len)
+		nvmet_tcp_execute_request(cmd);
 
 	nvmet_prepare_receive_pdu(queue);
 	return 0;
@@ -1144,9 +1179,9 @@ static int nvmet_tcp_try_recv_ddgst(struct nvmet_tcp_queue *queue)
 		goto out;
 	}
 
-	if (!(cmd->flags & NVMET_TCP_F_INIT_FAILED) &&
-	    cmd->rbytes_done == cmd->req.transfer_len)
-		cmd->req.execute(&cmd->req);
+	if (cmd->rbytes_done == cmd->req.transfer_len)
+		nvmet_tcp_execute_request(cmd);
+
 	ret = 0;
 out:
 	nvmet_prepare_receive_pdu(queue);
@@ -1216,6 +1251,23 @@ static void nvmet_tcp_schedule_release_queue(struct nvmet_tcp_queue *queue)
 	spin_unlock(&queue->state_lock);
 }
 
+static inline void nvmet_tcp_arm_queue_deadline(struct nvmet_tcp_queue *queue)
+{
+	queue->poll_end = jiffies + usecs_to_jiffies(idle_poll_period_usecs);
+}
+
+static bool nvmet_tcp_check_queue_deadline(struct nvmet_tcp_queue *queue,
+		int ops)
+{
+	if (!idle_poll_period_usecs)
+		return false;
+
+	if (ops)
+		nvmet_tcp_arm_queue_deadline(queue);
+
+	return !time_after(jiffies, queue->poll_end);
+}
+
 static void nvmet_tcp_io_work(struct work_struct *w)
 {
 	struct nvmet_tcp_queue *queue =
@@ -1241,9 +1293,10 @@ static void nvmet_tcp_io_work(struct work_struct *w)
 	} while (pending && ops < NVMET_TCP_IO_WORK_BUDGET);
 
 	/*
-	 * We exahusted our budget, requeue our selves
+	 * Requeue the worker if idle deadline period is in progress or any
+	 * ops activity was recorded during the do-while loop above.
 	 */
-	if (pending)
+	if (nvmet_tcp_check_queue_deadline(queue, ops) || pending)
 		queue_work_on(queue_cpu(queue), nvmet_tcp_wq, &queue->io_work);
 }
 
@@ -1434,7 +1487,7 @@ static void nvmet_tcp_state_change(struct sock *sk)
 {
 	struct nvmet_tcp_queue *queue;
 
-	write_lock_bh(&sk->sk_callback_lock);
+	read_lock_bh(&sk->sk_callback_lock);
 	queue = sk->sk_user_data;
 	if (!queue)
 		goto done;
@@ -1452,7 +1505,7 @@ static void nvmet_tcp_state_change(struct sock *sk)
 			queue->idx, sk->sk_state);
 	}
 done:
-	write_unlock_bh(&sk->sk_callback_lock);
+	read_unlock_bh(&sk->sk_callback_lock);
 }
 
 static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
@@ -1501,6 +1554,8 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
 		sock->sk->sk_state_change = nvmet_tcp_state_change;
 		queue->write_space = sock->sk->sk_write_space;
 		sock->sk->sk_write_space = nvmet_tcp_write_space;
+		if (idle_poll_period_usecs)
+			nvmet_tcp_arm_queue_deadline(queue);
 		queue_work_on(queue_cpu(queue), nvmet_tcp_wq, &queue->io_work);
 	}
 	write_unlock_bh(&sock->sk->sk_callback_lock);