nvme fixes for Linux 6.11

- Sparse fix on static symbol (Jinjie)
  - Misleading warning message fix (Keith)
  - TCP command allocation handling fix (Maurizio)
  - PCI tagset allocation handling fix (Keith)
  - Low-power quirk for Samsung (Georg)
  - Queue limits fix for zone devices (Christoph)
  - Target protocol behavior fix (Maurizio)
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Merge tag 'nvme-6.11-2024-09-05' of git://git.infradead.org/nvme into block-6.11

Pull NVMe fixes from Keith:

"nvme fixes for Linux 6.11

 - Sparse fix on static symbol (Jinjie)
 - Misleading warning message fix (Keith)
 - TCP command allocation handling fix (Maurizio)
 - PCI tagset allocation handling fix (Keith)
 - Low-power quirk for Samsung (Georg)
 - Queue limits fix for zone devices (Christoph)
 - Target protocol behavior fix (Maurizio)"

* tag 'nvme-6.11-2024-09-05' of git://git.infradead.org/nvme:
  nvmet: Identify-Active Namespace ID List command should reject invalid nsid
  nvme: set BLK_FEAT_ZONED for ZNS multipath disks
  nvme-pci: Add sleep quirk for Samsung 990 Evo
  nvme-pci: allocate tagset on reset if necessary
  nvmet-tcp: fix kernel crash if commands allocation fails
  nvme: use better description for async reset reason
  nvmet: Make nvmet_debugfs static

drivers/nvme/host/core.c

@@ -4437,7 +4437,8 @@ static bool nvme_handle_aen_notice(struct nvme_ctrl *ctrl, u32 result)
 
 static void nvme_handle_aer_persistent_error(struct nvme_ctrl *ctrl)
 {
-	dev_warn(ctrl->device, "resetting controller due to AER\n");
+	dev_warn(ctrl->device,
+		"resetting controller due to persistent internal error\n");
 	nvme_reset_ctrl(ctrl);
 }
 

drivers/nvme/host/multipath.c

@@ -616,7 +616,9 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head)
 	blk_set_stacking_limits(&lim);
 	lim.dma_alignment = 3;
 	lim.features |= BLK_FEAT_IO_STAT | BLK_FEAT_NOWAIT | BLK_FEAT_POLL;
-	if (head->ids.csi != NVME_CSI_ZNS)
+	if (head->ids.csi == NVME_CSI_ZNS)
+		lim.features |= BLK_FEAT_ZONED;
+	else
 		lim.max_zone_append_sectors = 0;
 
 	head->disk = blk_alloc_disk(&lim, ctrl->numa_node);

drivers/nvme/host/pci.c

@@ -2508,6 +2508,12 @@ static unsigned int nvme_pci_nr_maps(struct nvme_dev *dev)
 
 static void nvme_pci_update_nr_queues(struct nvme_dev *dev)
 {
+	if (!dev->ctrl.tagset) {
+		nvme_alloc_io_tag_set(&dev->ctrl, &dev->tagset, &nvme_mq_ops,
+				nvme_pci_nr_maps(dev), sizeof(struct nvme_iod));
+		return;
+	}
+
 	blk_mq_update_nr_hw_queues(&dev->tagset, dev->online_queues - 1);
 	/* free previously allocated queues that are no longer usable */
 	nvme_free_queues(dev, dev->online_queues);
@@ -2967,6 +2973,17 @@ static unsigned long check_vendor_combination_bug(struct pci_dev *pdev)
 		    dmi_match(DMI_BOARD_NAME, "NS5x_7xPU") ||
 		    dmi_match(DMI_BOARD_NAME, "PH4PRX1_PH6PRX1"))
 			return NVME_QUIRK_FORCE_NO_SIMPLE_SUSPEND;
+	} else if (pdev->vendor == 0x144d && pdev->device == 0xa80d) {
+		/*
+		 * Exclude Samsung 990 Evo from NVME_QUIRK_SIMPLE_SUSPEND
+		 * because of high power consumption (> 2 Watt) in s2idle
+		 * sleep. Only some boards with Intel CPU are affected.
+		 */
+		if (dmi_match(DMI_BOARD_NAME, "GMxPXxx") ||
+		    dmi_match(DMI_BOARD_NAME, "PH4PG31") ||
+		    dmi_match(DMI_BOARD_NAME, "PH4PRX1_PH6PRX1") ||
+		    dmi_match(DMI_BOARD_NAME, "PH6PG01_PH6PG71"))
+			return NVME_QUIRK_FORCE_NO_SIMPLE_SUSPEND;
 	}
 
 	/*

drivers/nvme/target/admin-cmd.c

@@ -587,6 +587,16 @@ static void nvmet_execute_identify_nslist(struct nvmet_req *req)
 	u16 status = 0;
 	int i = 0;
 
+	/*
+	 * NSID values 0xFFFFFFFE and NVME_NSID_ALL are invalid
+	 * See NVMe Base Specification, Active Namespace ID list (CNS 02h).
+	 */
+	if (min_nsid == 0xFFFFFFFE || min_nsid == NVME_NSID_ALL) {
+		req->error_loc = offsetof(struct nvme_identify, nsid);
+		status = NVME_SC_INVALID_NS | NVME_STATUS_DNR;
+		goto out;
+	}
+
 	list = kzalloc(buf_size, GFP_KERNEL);
 	if (!list) {
 		status = NVME_SC_INTERNAL;

drivers/nvme/target/debugfs.c

@@ -13,7 +13,7 @@
 #include "nvmet.h"
 #include "debugfs.h"
 
-struct dentry *nvmet_debugfs;
+static struct dentry *nvmet_debugfs;
 
 #define NVMET_DEBUGFS_ATTR(field) \
 	static int field##_open(struct inode *inode, struct file *file) \

drivers/nvme/target/tcp.c

@@ -2146,8 +2146,10 @@ static u16 nvmet_tcp_install_queue(struct nvmet_sq *sq)
 	}
 
 	queue->nr_cmds = sq->size * 2;
-	if (nvmet_tcp_alloc_cmds(queue))
+	if (nvmet_tcp_alloc_cmds(queue)) {
+		queue->nr_cmds = 0;
 		return NVME_SC_INTERNAL;
+	}
 	return 0;
 }