4 files changed, 108 insertions, 86 deletions

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 3b77cfe5aa1e..37046ac2c441 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -336,7 +336,7 @@ static int nvme_get_stream_params(struct nvme_ctrl *ctrl,
 
 	c.directive.opcode = nvme_admin_directive_recv;
 	c.directive.nsid = cpu_to_le32(nsid);
-	c.directive.numd = cpu_to_le32(sizeof(*s));
+	c.directive.numd = cpu_to_le32((sizeof(*s) >> 2) - 1);
 	c.directive.doper = NVME_DIR_RCV_ST_OP_PARAM;
 	c.directive.dtype = NVME_DIR_STREAMS;
 
@@ -1509,7 +1509,7 @@ static void nvme_set_queue_limits(struct nvme_ctrl *ctrl,
 	blk_queue_write_cache(q, vwc, vwc);
 }
 
-static void nvme_configure_apst(struct nvme_ctrl *ctrl)
+static int nvme_configure_apst(struct nvme_ctrl *ctrl)
 {
 	/*
 	 * APST (Autonomous Power State Transition) lets us program a
@@ -1538,16 +1538,16 @@ static void nvme_configure_apst(struct nvme_ctrl *ctrl)
 	 * then don't do anything.
 	 */
 	if (!ctrl->apsta)
-		return;
+		return 0;
 
 	if (ctrl->npss > 31) {
 		dev_warn(ctrl->device, "NPSS is invalid; not using APST\n");
-		return;
+		return 0;
 	}
 
 	table = kzalloc(sizeof(*table), GFP_KERNEL);
 	if (!table)
-		return;
+		return 0;
 
 	if (!ctrl->apst_enabled || ctrl->ps_max_latency_us == 0) {
 		/* Turn off APST. */
@@ -1629,6 +1629,7 @@ static void nvme_configure_apst(struct nvme_ctrl *ctrl)
 		dev_err(ctrl->device, "failed to set APST feature (%d)\n", ret);
 
 	kfree(table);
+	return ret;
 }
 
 static void nvme_set_latency_tolerance(struct device *dev, s32 val)
@@ -1835,13 +1836,16 @@ int nvme_init_identify(struct nvme_ctrl *ctrl)
 		 * In fabrics we need to verify the cntlid matches the
 		 * admin connect
 		 */
-		if (ctrl->cntlid != le16_to_cpu(id->cntlid))
+		if (ctrl->cntlid != le16_to_cpu(id->cntlid)) {
 			ret = -EINVAL;
+			goto out_free;
+		}
 
 		if (!ctrl->opts->discovery_nqn && !ctrl->kas) {
 			dev_err(ctrl->device,
 				"keep-alive support is mandatory for fabrics\n");
 			ret = -EINVAL;
+			goto out_free;
 		}
 	} else {
 		ctrl->cntlid = le16_to_cpu(id->cntlid);
@@ -1856,11 +1860,20 @@ int nvme_init_identify(struct nvme_ctrl *ctrl)
 	else if (!ctrl->apst_enabled && prev_apst_enabled)
 		dev_pm_qos_hide_latency_tolerance(ctrl->device);
 
-	nvme_configure_apst(ctrl);
-	nvme_configure_directives(ctrl);
+	ret = nvme_configure_apst(ctrl);
+	if (ret < 0)
+		return ret;
+
+	ret = nvme_configure_directives(ctrl);
+	if (ret < 0)
+		return ret;
 
 	ctrl->identified = true;
 
+	return 0;
+
+out_free:
+	kfree(id);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(nvme_init_identify);
@@ -1995,15 +2008,20 @@ static ssize_t wwid_show(struct device *dev, struct device_attribute *attr,
 	int serial_len = sizeof(ctrl->serial);
 	int model_len = sizeof(ctrl->model);
 
+	if (!uuid_is_null(&ns->uuid))
+		return sprintf(buf, "uuid.%pU\n", &ns->uuid);
+
 	if (memchr_inv(ns->nguid, 0, sizeof(ns->nguid)))
 		return sprintf(buf, "eui.%16phN\n", ns->nguid);
 
 	if (memchr_inv(ns->eui, 0, sizeof(ns->eui)))
 		return sprintf(buf, "eui.%8phN\n", ns->eui);
 
-	while (ctrl->serial[serial_len - 1] == ' ')
+	while (serial_len > 0 && (ctrl->serial[serial_len - 1] == ' ' ||
+				  ctrl->serial[serial_len - 1] == '\0'))
 		serial_len--;
-	while (ctrl->model[model_len - 1] == ' ')
+	while (model_len > 0 && (ctrl->model[model_len - 1] == ' ' ||
+				 ctrl->model[model_len - 1] == '\0'))
 		model_len--;
 
 	return sprintf(buf, "nvme.%04x-%*phN-%*phN-%08x\n", ctrl->vid,
@@ -2709,7 +2727,8 @@ void nvme_kill_queues(struct nvme_ctrl *ctrl)
 	mutex_lock(&ctrl->namespaces_mutex);
 
 	/* Forcibly unquiesce queues to avoid blocking dispatch */
-	blk_mq_unquiesce_queue(ctrl->admin_q);
+	if (ctrl->admin_q)
+		blk_mq_unquiesce_queue(ctrl->admin_q);
 
 	list_for_each_entry(ns, &ctrl->namespaces, list) {
 		/*
diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index 2e582a240943..5f5cd306f76d 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -794,7 +794,8 @@ static int nvmf_check_allowed_opts(struct nvmf_ctrl_options *opts,
 		int i;
 
 		for (i = 0; i < ARRAY_SIZE(opt_tokens); i++) {
-			if (opt_tokens[i].token & ~allowed_opts) {
+			if ((opt_tokens[i].token & opts->mask) &&
+			    (opt_tokens[i].token & ~allowed_opts)) {
 				pr_warn("invalid parameter '%s'\n",
 					opt_tokens[i].pattern);
 			}
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index d666ada39a9b..5c2a08ef08ba 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -1888,7 +1888,7 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
 	 * the target device is present
 	 */
 	if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE)
-		return BLK_STS_IOERR;
+		goto busy;
 
 	if (!nvme_fc_ctrl_get(ctrl))
 		return BLK_STS_IOERR;
@@ -1958,22 +1958,25 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
 					queue->lldd_handle, &op->fcp_req);
 
 	if (ret) {
-		if (op->rq)			/* normal request */
+		if (!(op->flags & FCOP_FLAGS_AEN))
 			nvme_fc_unmap_data(ctrl, op->rq, op);
-		/* else - aen. no cleanup needed */
 
 		nvme_fc_ctrl_put(ctrl);
 
-		if (ret != -EBUSY)
+		if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE &&
+				ret != -EBUSY)
 			return BLK_STS_IOERR;
 
-		if (op->rq)
-			blk_mq_delay_run_hw_queue(queue->hctx, NVMEFC_QUEUE_DELAY);
-
-		return BLK_STS_RESOURCE;
+		goto busy;
 	}
 
 	return BLK_STS_OK;
+
+busy:
+	if (!(op->flags & FCOP_FLAGS_AEN) && queue->hctx)
+		blk_mq_delay_run_hw_queue(queue->hctx, NVMEFC_QUEUE_DELAY);
+
+	return BLK_STS_RESOURCE;
 }
 
 static blk_status_t
@@ -2802,66 +2805,70 @@ out_fail:
 	return ERR_PTR(ret);
 }
 
-enum {
-	FCT_TRADDR_ERR		= 0,
-	FCT_TRADDR_WWNN		= 1 << 0,
-	FCT_TRADDR_WWPN		= 1 << 1,
-};
 
 struct nvmet_fc_traddr {
 	u64	nn;
 	u64	pn;
 };
 
-static const match_table_t traddr_opt_tokens = {
-	{ FCT_TRADDR_WWNN,	"nn-%s"		},
-	{ FCT_TRADDR_WWPN,	"pn-%s"		},
-	{ FCT_TRADDR_ERR,	NULL		}
-};
-
 static int
-nvme_fc_parse_address(struct nvmet_fc_traddr *traddr, char *buf)
+__nvme_fc_parse_u64(substring_t *sstr, u64 *val)
 {
-	substring_t args[MAX_OPT_ARGS];
-	char *options, *o, *p;
-	int token, ret = 0;
 	u64 token64;
 
-	options = o = kstrdup(buf, GFP_KERNEL);
-	if (!options)
-		return -ENOMEM;
+	if (match_u64(sstr, &token64))
+		return -EINVAL;
+	*val = token64;
 
-	while ((p = strsep(&o, ":\n")) != NULL) {
-		if (!*p)
-			continue;
+	return 0;
+}
 
-		token = match_token(p, traddr_opt_tokens, args);
-		switch (token) {
-		case FCT_TRADDR_WWNN:
-			if (match_u64(args, &token64)) {
-				ret = -EINVAL;
-				goto out;
-			}
-			traddr->nn = token64;
-			break;
-		case FCT_TRADDR_WWPN:
-			if (match_u64(args, &token64)) {
-				ret = -EINVAL;
-				goto out;
-			}
-			traddr->pn = token64;
-			break;
-		default:
-			pr_warn("unknown traddr token or missing value '%s'\n",
-					p);
-			ret = -EINVAL;
-			goto out;
-		}
-	}
+/*
+ * This routine validates and extracts the WWN's from the TRADDR string.
+ * As kernel parsers need the 0x to determine number base, universally
+ * build string to parse with 0x prefix before parsing name strings.
+ */
+static int
+nvme_fc_parse_traddr(struct nvmet_fc_traddr *traddr, char *buf, size_t blen)
+{
+	char name[2 + NVME_FC_TRADDR_HEXNAMELEN + 1];
+	substring_t wwn = { name, &name[sizeof(name)-1] };
+	int nnoffset, pnoffset;
+
+	/* validate it string one of the 2 allowed formats */
+	if (strnlen(buf, blen) == NVME_FC_TRADDR_MAXLENGTH &&
+			!strncmp(buf, "nn-0x", NVME_FC_TRADDR_OXNNLEN) &&
+			!strncmp(&buf[NVME_FC_TRADDR_MAX_PN_OFFSET],
+				"pn-0x", NVME_FC_TRADDR_OXNNLEN)) {
+		nnoffset = NVME_FC_TRADDR_OXNNLEN;
+		pnoffset = NVME_FC_TRADDR_MAX_PN_OFFSET +
+						NVME_FC_TRADDR_OXNNLEN;
+	} else if ((strnlen(buf, blen) == NVME_FC_TRADDR_MINLENGTH &&
+			!strncmp(buf, "nn-", NVME_FC_TRADDR_NNLEN) &&
+			!strncmp(&buf[NVME_FC_TRADDR_MIN_PN_OFFSET],
+				"pn-", NVME_FC_TRADDR_NNLEN))) {
+		nnoffset = NVME_FC_TRADDR_NNLEN;
+		pnoffset = NVME_FC_TRADDR_MIN_PN_OFFSET + NVME_FC_TRADDR_NNLEN;
+	} else
+		goto out_einval;
 
-out:
-	kfree(options);
-	return ret;
+	name[0] = '0';
+	name[1] = 'x';
+	name[2 + NVME_FC_TRADDR_HEXNAMELEN] = 0;
+
+	memcpy(&name[2], &buf[nnoffset], NVME_FC_TRADDR_HEXNAMELEN);
+	if (__nvme_fc_parse_u64(&wwn, &traddr->nn))
+		goto out_einval;
+
+	memcpy(&name[2], &buf[pnoffset], NVME_FC_TRADDR_HEXNAMELEN);
+	if (__nvme_fc_parse_u64(&wwn, &traddr->pn))
+		goto out_einval;
+
+	return 0;
+
+out_einval:
+	pr_warn("%s: bad traddr string\n", __func__);
+	return -EINVAL;
 }
 
 static struct nvme_ctrl *
@@ -2875,11 +2882,11 @@ nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts)
 	unsigned long flags;
 	int ret;
 
-	ret = nvme_fc_parse_address(&raddr, opts->traddr);
+	ret = nvme_fc_parse_traddr(&raddr, opts->traddr, NVMF_TRADDR_SIZE);
 	if (ret || !raddr.nn || !raddr.pn)
 		return ERR_PTR(-EINVAL);
 
-	ret = nvme_fc_parse_address(&laddr, opts->host_traddr);
+	ret = nvme_fc_parse_traddr(&laddr, opts->host_traddr, NVMF_TRADDR_SIZE);
 	if (ret || !laddr.nn || !laddr.pn)
 		return ERR_PTR(-EINVAL);
 
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 8569ee771269..925467b31a33 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -801,6 +801,7 @@ static inline void nvme_handle_cqe(struct nvme_queue *nvmeq,
 		return;
 	}
 
+	nvmeq->cqe_seen = 1;
 	req = blk_mq_tag_to_rq(*nvmeq->tags, cqe->command_id);
 	nvme_end_request(req, cqe->status, cqe->result);
 }
@@ -830,10 +831,8 @@ static void nvme_process_cq(struct nvme_queue *nvmeq)
 		consumed++;
 	}
 
-	if (consumed) {
+	if (consumed)
 		nvme_ring_cq_doorbell(nvmeq);
-		nvmeq->cqe_seen = 1;
-	}
 }
 
 static irqreturn_t nvme_irq(int irq, void *data)
@@ -1558,11 +1557,9 @@ static inline void nvme_release_cmb(struct nvme_dev *dev)
 	if (dev->cmb) {
 		iounmap(dev->cmb);
 		dev->cmb = NULL;
-		if (dev->cmbsz) {
-			sysfs_remove_file_from_group(&dev->ctrl.device->kobj,
-						     &dev_attr_cmb.attr, NULL);
-			dev->cmbsz = 0;
-		}
+		sysfs_remove_file_from_group(&dev->ctrl.device->kobj,
+					     &dev_attr_cmb.attr, NULL);
+		dev->cmbsz = 0;
 	}
 }
 
@@ -1619,7 +1616,7 @@ static void nvme_free_host_mem(struct nvme_dev *dev)
 static int nvme_alloc_host_mem(struct nvme_dev *dev, u64 min, u64 preferred)
 {
 	struct nvme_host_mem_buf_desc *descs;
-	u32 chunk_size, max_entries;
+	u32 chunk_size, max_entries, len;
 	int i = 0;
 	void **bufs;
 	u64 size = 0, tmp;
@@ -1638,10 +1635,10 @@ retry:
 	if (!bufs)
 		goto out_free_descs;
 
-	for (size = 0; size < preferred; size += chunk_size) {
-		u32 len = min_t(u64, chunk_size, preferred - size);
+	for (size = 0; size < preferred; size += len) {
 		dma_addr_t dma_addr;
 
+		len = min_t(u64, chunk_size, preferred - size);
 		bufs[i] = dma_alloc_attrs(dev->dev, len, &dma_addr, GFP_KERNEL,
 				DMA_ATTR_NO_KERNEL_MAPPING | DMA_ATTR_NO_WARN);
 		if (!bufs[i])
@@ -1953,16 +1950,14 @@ static int nvme_pci_enable(struct nvme_dev *dev)
 
 	/*
 	 * CMBs can currently only exist on >=1.2 PCIe devices. We only
-	 * populate sysfs if a CMB is implemented. Note that we add the
-	 * CMB attribute to the nvme_ctrl kobj which removes the need to remove
-	 * it on exit. Since nvme_dev_attrs_group has no name we can pass
-	 * NULL as final argument to sysfs_add_file_to_group.
+	 * populate sysfs if a CMB is implemented. Since nvme_dev_attrs_group
+	 * has no name we can pass NULL as final argument to
+	 * sysfs_add_file_to_group.
 	 */
 
 	if (readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 2, 0)) {
 		dev->cmb = nvme_map_cmb(dev);
-
-		if (dev->cmbsz) {
+		if (dev->cmb) {
 			if (sysfs_add_file_to_group(&dev->ctrl.device->kobj,
 						    &dev_attr_cmb.attr, NULL))
 				dev_warn(dev->ctrl.device,