Merge tag 'nvme-6.9-2024-05-09' of git://git.infradead.org/nvme into block-6.9

Pull NVMe fixes from Keith:

"nvme fixes for Linux 6.9

 - nvme target fixes (Sagi, Dan, Maurizo)
 - new vendor quirk for broken MSI (Sean)"

* tag 'nvme-6.9-2024-05-09' of git://git.infradead.org/nvme:
  nvmet-rdma: fix possible bad dereference when freeing rsps
  nvmet: prevent sprintf() overflow in nvmet_subsys_nsid_exists()
  nvmet: make nvmet_wq unbound
  nvmet-auth: return the error code to the nvmet_auth_ctrl_hash() callers
  nvme-pci: Add quirk for broken MSIs

drivers/nvme/host/nvme.h

@@ -162,6 +162,11 @@ enum nvme_quirks {
 	 * Disables simple suspend/resume path.
 	 */
 	NVME_QUIRK_FORCE_NO_SIMPLE_SUSPEND	= (1 << 20),
+
+	/*
+	 * MSI (but not MSI-X) interrupts are broken and never fire.
+	 */
+	NVME_QUIRK_BROKEN_MSI			= (1 << 21),
 };
 
 /*

drivers/nvme/host/pci.c

@@ -2224,6 +2224,7 @@ static int nvme_setup_irqs(struct nvme_dev *dev, unsigned int nr_io_queues)
 		.priv		= dev,
 	};
 	unsigned int irq_queues, poll_queues;
+	unsigned int flags = PCI_IRQ_ALL_TYPES | PCI_IRQ_AFFINITY;
 
 	/*
 	 * Poll queues don't need interrupts, but we need at least one I/O queue
@@ -2247,8 +2248,10 @@ static int nvme_setup_irqs(struct nvme_dev *dev, unsigned int nr_io_queues)
 	irq_queues = 1;
 	if (!(dev->ctrl.quirks & NVME_QUIRK_SINGLE_VECTOR))
 		irq_queues += (nr_io_queues - poll_queues);
-	return pci_alloc_irq_vectors_affinity(pdev, 1, irq_queues,
-			      PCI_IRQ_ALL_TYPES | PCI_IRQ_AFFINITY, &affd);
+	if (dev->ctrl.quirks & NVME_QUIRK_BROKEN_MSI)
+		flags &= ~PCI_IRQ_MSI;
+	return pci_alloc_irq_vectors_affinity(pdev, 1, irq_queues, flags,
+					      &affd);
 }
 
 static unsigned int nvme_max_io_queues(struct nvme_dev *dev)
@@ -2477,6 +2480,7 @@ static int nvme_pci_enable(struct nvme_dev *dev)
 {
 	int result = -ENOMEM;
 	struct pci_dev *pdev = to_pci_dev(dev->dev);
+	unsigned int flags = PCI_IRQ_ALL_TYPES;
 
 	if (pci_enable_device_mem(pdev))
 		return result;
@@ -2493,7 +2497,9 @@ static int nvme_pci_enable(struct nvme_dev *dev)
 	 * interrupts. Pre-enable a single MSIX or MSI vec for setup. We'll
 	 * adjust this later.
 	 */
-	result = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
+	if (dev->ctrl.quirks & NVME_QUIRK_BROKEN_MSI)
+		flags &= ~PCI_IRQ_MSI;
+	result = pci_alloc_irq_vectors(pdev, 1, 1, flags);
 	if (result < 0)
 		goto disable;
 
@@ -3390,6 +3396,8 @@ static const struct pci_device_id nvme_id_table[] = {
 		.driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY |
 				NVME_QUIRK_DISABLE_WRITE_ZEROES|
 				NVME_QUIRK_IGNORE_DEV_SUBNQN, },
+	{ PCI_DEVICE(0x15b7, 0x5008),   /* Sandisk SN530 */
+		.driver_data = NVME_QUIRK_BROKEN_MSI },
 	{ PCI_DEVICE(0x1987, 0x5012),	/* Phison E12 */
 		.driver_data = NVME_QUIRK_BOGUS_NID, },
 	{ PCI_DEVICE(0x1987, 0x5016),	/* Phison E16 */

drivers/nvme/target/auth.c

@@ -480,7 +480,7 @@ int nvmet_auth_ctrl_hash(struct nvmet_req *req, u8 *response,
 	nvme_auth_free_key(transformed_key);
 out_free_tfm:
 	crypto_free_shash(shash_tfm);
-	return 0;
+	return ret;
 }
 
 int nvmet_auth_ctrl_exponential(struct nvmet_req *req,

drivers/nvme/target/configfs.c

@@ -757,10 +757,9 @@ static struct configfs_attribute *nvmet_ns_attrs[] = {
 bool nvmet_subsys_nsid_exists(struct nvmet_subsys *subsys, u32 nsid)
 {
 	struct config_item *ns_item;
-	char name[4] = {};
+	char name[12];
 
-	if (sprintf(name, "%u", nsid) <= 0)
-		return false;
+	snprintf(name, sizeof(name), "%u", nsid);
 	mutex_lock(&subsys->namespaces_group.cg_subsys->su_mutex);
 	ns_item = config_group_find_item(&subsys->namespaces_group, name);
 	mutex_unlock(&subsys->namespaces_group.cg_subsys->su_mutex);

drivers/nvme/target/core.c

@@ -1686,7 +1686,8 @@ static int __init nvmet_init(void)
 	if (!buffered_io_wq)
 		goto out_free_zbd_work_queue;
 
-	nvmet_wq = alloc_workqueue("nvmet-wq", WQ_MEM_RECLAIM, 0);
+	nvmet_wq = alloc_workqueue("nvmet-wq",
+			WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
 	if (!nvmet_wq)
 		goto out_free_buffered_work_queue;
 

drivers/nvme/target/rdma.c

@@ -474,12 +474,8 @@ nvmet_rdma_alloc_rsps(struct nvmet_rdma_queue *queue)
 	return 0;
 
 out_free:
-	while (--i >= 0) {
-		struct nvmet_rdma_rsp *rsp = &queue->rsps[i];
-
-		list_del(&rsp->free_list);
-		nvmet_rdma_free_rsp(ndev, rsp);
-	}
+	while (--i >= 0)
+		nvmet_rdma_free_rsp(ndev, &queue->rsps[i]);
 	kfree(queue->rsps);
 out:
 	return ret;
@@ -490,12 +486,8 @@ static void nvmet_rdma_free_rsps(struct nvmet_rdma_queue *queue)
 	struct nvmet_rdma_device *ndev = queue->dev;
 	int i, nr_rsps = queue->recv_queue_size * 2;
 
-	for (i = 0; i < nr_rsps; i++) {
-		struct nvmet_rdma_rsp *rsp = &queue->rsps[i];
-
-		list_del(&rsp->free_list);
-		nvmet_rdma_free_rsp(ndev, rsp);
-	}
+	for (i = 0; i < nr_rsps; i++)
+		nvmet_rdma_free_rsp(ndev, &queue->rsps[i]);
 	kfree(queue->rsps);
 }