block-5.12-2021-03-05

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Merge tag 'block-5.12-2021-03-05' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - NVMe fixes:
      - more device quirks (Julian Einwag, Zoltán Böszörményi, Pascal
        Terjan)
      - fix a hwmon error return (Daniel Wagner)
      - fix the keep alive timeout initialization (Martin George)
      - ensure the model_number can't be changed on a used subsystem
        (Max Gurtovoy)

 - rsxx missing -EFAULT on copy_to_user() failure (Dan)

 - rsxx remove unused linux.h include (Tian)

 - kill unused RQF_SORTED (Jean)

 - updated outdated BFQ comments (Joseph)

 - revert work-around commit for bd_size_lock, since we removed the
   offending user in this merge window (Damien)

* tag 'block-5.12-2021-03-05' of git://git.kernel.dk/linux-block:
  nvmet: model_number must be immutable once set
  nvme-fabrics: fix kato initialization
  nvme-hwmon: Return error code when registration fails
  nvme-pci: add quirks for Lexar 256GB SSD
  nvme-pci: mark Kingston SKC2000 as not supporting the deepest power state
  nvme-pci: mark Seagate Nytro XM1440 as QUIRK_NO_NS_DESC_LIST.
  rsxx: Return -EFAULT if copy_to_user() fails
  block/bfq: update comments and default value in docs for fifo_expire
  rsxx: remove unused including <linux/version.h>
  block: Drop leftover references to RQF_SORTED
  block: revert "block: fix bd_size_lock use"

Documentation/block/bfq-iosched.rst

@@ -430,13 +430,13 @@ fifo_expire_async
 -----------------
 
 This parameter is used to set the timeout of asynchronous requests. Default
-value of this is 248ms.
+value of this is 250ms.
 
 fifo_expire_sync
 ----------------
 
 This parameter is used to set the timeout of synchronous requests. Default
-value of this is 124ms. In case to favor synchronous requests over asynchronous
+value of this is 125ms. In case to favor synchronous requests over asynchronous
 one, this value should be decreased relative to fifo_expire_async.
 
 low_latency

block/bfq-iosched.c

@@ -162,7 +162,7 @@ BFQ_BFQQ_FNS(split_coop);
 BFQ_BFQQ_FNS(softrt_update);
 #undef BFQ_BFQQ_FNS						\
 
-/* Expiration time of sync (0) and async (1) requests, in ns. */
+/* Expiration time of async (0) and sync (1) requests, in ns. */
 static const u64 bfq_fifo_expire[2] = { NSEC_PER_SEC / 4, NSEC_PER_SEC / 8 };
 
 /* Maximum backwards seek (magic number lifted from CFQ), in KiB. */

block/blk-mq-debugfs.c

@@ -292,7 +292,6 @@ static const char *const cmd_flag_name[] = {
 
 #define RQF_NAME(name) [ilog2((__force u32)RQF_##name)] = #name
 static const char *const rqf_name[] = {
-	RQF_NAME(SORTED),
 	RQF_NAME(STARTED),
 	RQF_NAME(SOFTBARRIER),
 	RQF_NAME(FLUSH_SEQ),

block/blk-mq-sched.c

@@ -385,7 +385,6 @@ bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq)
 EXPORT_SYMBOL_GPL(blk_mq_sched_try_insert_merge);
 
 static bool blk_mq_sched_bypass_insert(struct blk_mq_hw_ctx *hctx,
-				       bool has_sched,
 				       struct request *rq)
 {
 	/*
@@ -402,9 +401,6 @@ static bool blk_mq_sched_bypass_insert(struct blk_mq_hw_ctx *hctx,
 	if ((rq->rq_flags & RQF_FLUSH_SEQ) || blk_rq_is_passthrough(rq))
 		return true;
 
-	if (has_sched)
-		rq->rq_flags |= RQF_SORTED;
-
 	return false;
 }
 
@@ -418,7 +414,7 @@ void blk_mq_sched_insert_request(struct request *rq, bool at_head,
 
 	WARN_ON(e && (rq->tag != BLK_MQ_NO_TAG));
 
-	if (blk_mq_sched_bypass_insert(hctx, !!e, rq)) {
+	if (blk_mq_sched_bypass_insert(hctx, rq)) {
 		/*
 		 * Firstly normal IO request is inserted to scheduler queue or
 		 * sw queue, meantime we add flush request to dispatch queue(

block/genhd.c

@@ -45,11 +45,10 @@ static void disk_release_events(struct gendisk *disk);
 void set_capacity(struct gendisk *disk, sector_t sectors)
 {
 	struct block_device *bdev = disk->part0;
-	unsigned long flags;
 
-	spin_lock_irqsave(&bdev->bd_size_lock, flags);
+	spin_lock(&bdev->bd_size_lock);
 	i_size_write(bdev->bd_inode, (loff_t)sectors << SECTOR_SHIFT);
-	spin_unlock_irqrestore(&bdev->bd_size_lock, flags);
+	spin_unlock(&bdev->bd_size_lock);
 }
 EXPORT_SYMBOL(set_capacity);
 

block/partitions/core.c

@@ -88,11 +88,9 @@ static int (*check_part[])(struct parsed_partitions *) = {
 
 static void bdev_set_nr_sectors(struct block_device *bdev, sector_t sectors)
 {
-	unsigned long flags;
-
-	spin_lock_irqsave(&bdev->bd_size_lock, flags);
+	spin_lock(&bdev->bd_size_lock);
 	i_size_write(bdev->bd_inode, (loff_t)sectors << SECTOR_SHIFT);
-	spin_unlock_irqrestore(&bdev->bd_size_lock, flags);
+	spin_unlock(&bdev->bd_size_lock);
 }
 
 static struct parsed_partitions *allocate_partitions(struct gendisk *hd)

drivers/block/rsxx/core.c

@@ -165,15 +165,17 @@ static ssize_t rsxx_cram_read(struct file *fp, char __user *ubuf,
 {
 	struct rsxx_cardinfo *card = file_inode(fp)->i_private;
 	char *buf;
-	ssize_t st;
+	int st;
 
 	buf = kzalloc(cnt, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;
 
 	st = rsxx_creg_read(card, CREG_ADD_CRAM + (u32)*ppos, cnt, buf, 1);
-	if (!st)
-		st = copy_to_user(ubuf, buf, cnt);
+	if (!st) {
+		if (copy_to_user(ubuf, buf, cnt))
+			st = -EFAULT;
+	}
 	kfree(buf);
 	if (st)
 		return st;

drivers/block/rsxx/rsxx_priv.h

@@ -11,7 +11,6 @@
 #ifndef __RSXX_PRIV_H__
 #define __RSXX_PRIV_H__
 
-#include <linux/version.h>
 #include <linux/semaphore.h>
 
 #include <linux/fs.h>

drivers/nvme/host/fabrics.c

@@ -630,7 +630,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
 	opts->queue_size = NVMF_DEF_QUEUE_SIZE;
 	opts->nr_io_queues = num_online_cpus();
 	opts->reconnect_delay = NVMF_DEF_RECONNECT_DELAY;
-	opts->kato = NVME_DEFAULT_KATO;
+	opts->kato = 0;
 	opts->duplicate_connect = false;
 	opts->fast_io_fail_tmo = NVMF_DEF_FAIL_FAST_TMO;
 	opts->hdr_digest = false;
@@ -893,6 +893,9 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
 		opts->nr_write_queues = 0;
 		opts->nr_poll_queues = 0;
 		opts->duplicate_connect = true;
+	} else {
+		if (!opts->kato)
+			opts->kato = NVME_DEFAULT_KATO;
 	}
 	if (ctrl_loss_tmo < 0) {
 		opts->max_reconnects = -1;

drivers/nvme/host/hwmon.c

@@ -248,6 +248,7 @@ int nvme_hwmon_init(struct nvme_ctrl *ctrl)
 	if (IS_ERR(hwmon)) {
 		dev_warn(dev, "Failed to instantiate hwmon device\n");
 		kfree(data);
+		return PTR_ERR(hwmon);
 	}
 	ctrl->hwmon_device = hwmon;
 	return 0;

drivers/nvme/host/pci.c

@@ -3234,7 +3234,8 @@ static const struct pci_device_id nvme_id_table[] = {
 	{ PCI_DEVICE(0x126f, 0x2263),	/* Silicon Motion unidentified */
 		.driver_data = NVME_QUIRK_NO_NS_DESC_LIST, },
 	{ PCI_DEVICE(0x1bb1, 0x0100),   /* Seagate Nytro Flash Storage */
-		.driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, },
+		.driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY |
+				NVME_QUIRK_NO_NS_DESC_LIST, },
 	{ PCI_DEVICE(0x1c58, 0x0003),	/* HGST adapter */
 		.driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, },
 	{ PCI_DEVICE(0x1c58, 0x0023),	/* WDC SN200 adapter */
@@ -3248,6 +3249,9 @@ static const struct pci_device_id nvme_id_table[] = {
 				NVME_QUIRK_IGNORE_DEV_SUBNQN, },
 	{ PCI_DEVICE(0x1987, 0x5016),	/* Phison E16 */
 		.driver_data = NVME_QUIRK_IGNORE_DEV_SUBNQN, },
+	{ PCI_DEVICE(0x1b4b, 0x1092),	/* Lexar 256 GB SSD */
+		.driver_data = NVME_QUIRK_NO_NS_DESC_LIST |
+				NVME_QUIRK_IGNORE_DEV_SUBNQN, },
 	{ PCI_DEVICE(0x1d1d, 0x1f1f),	/* LighNVM qemu device */
 		.driver_data = NVME_QUIRK_LIGHTNVM, },
 	{ PCI_DEVICE(0x1d1d, 0x2807),	/* CNEX WL */
@@ -3265,6 +3269,8 @@ static const struct pci_device_id nvme_id_table[] = {
 		.driver_data = NVME_QUIRK_DISABLE_WRITE_ZEROES, },
 	{ PCI_DEVICE(0x1d97, 0x2263),   /* SPCC */
 		.driver_data = NVME_QUIRK_DISABLE_WRITE_ZEROES, },
+	{ PCI_DEVICE(0x2646, 0x2262),   /* KINGSTON SKC2000 NVMe SSD */
+		.driver_data = NVME_QUIRK_NO_DEEPEST_PS, },
 	{ PCI_DEVICE(0x2646, 0x2263),   /* KINGSTON A2000 NVMe SSD  */
 		.driver_data = NVME_QUIRK_NO_DEEPEST_PS, },
 	{ PCI_DEVICE(PCI_VENDOR_ID_AMAZON, 0x0061),

drivers/nvme/target/admin-cmd.c

@@ -313,27 +313,40 @@ static void nvmet_execute_get_log_page(struct nvmet_req *req)
 	nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_SC_DNR);
 }
 
-static void nvmet_id_set_model_number(struct nvme_id_ctrl *id,
-				      struct nvmet_subsys *subsys)
+static u16 nvmet_set_model_number(struct nvmet_subsys *subsys)
 {
-	const char *model = NVMET_DEFAULT_CTRL_MODEL;
-	struct nvmet_subsys_model *subsys_model;
+	u16 status = 0;
 
-	rcu_read_lock();
-	subsys_model = rcu_dereference(subsys->model);
-	if (subsys_model)
-		model = subsys_model->number;
-	memcpy_and_pad(id->mn, sizeof(id->mn), model, strlen(model), ' ');
-	rcu_read_unlock();
+	mutex_lock(&subsys->lock);
+	if (!subsys->model_number) {
+		subsys->model_number =
+			kstrdup(NVMET_DEFAULT_CTRL_MODEL, GFP_KERNEL);
+		if (!subsys->model_number)
+			status = NVME_SC_INTERNAL;
+	}
+	mutex_unlock(&subsys->lock);
+
+	return status;
 }
 
 static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
 {
 	struct nvmet_ctrl *ctrl = req->sq->ctrl;
+	struct nvmet_subsys *subsys = ctrl->subsys;
 	struct nvme_id_ctrl *id;
 	u32 cmd_capsule_size;
 	u16 status = 0;
 
+	/*
+	 * If there is no model number yet, set it now.  It will then remain
+	 * stable for the life time of the subsystem.
+	 */
+	if (!subsys->model_number) {
+		status = nvmet_set_model_number(subsys);
+		if (status)
+			goto out;
+	}
+
 	id = kzalloc(sizeof(*id), GFP_KERNEL);
 	if (!id) {
 		status = NVME_SC_INTERNAL;
@@ -347,7 +360,8 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
 	memset(id->sn, ' ', sizeof(id->sn));
 	bin2hex(id->sn, &ctrl->subsys->serial,
 		min(sizeof(ctrl->subsys->serial), sizeof(id->sn) / 2));
-	nvmet_id_set_model_number(id, ctrl->subsys);
+	memcpy_and_pad(id->mn, sizeof(id->mn), subsys->model_number,
+		       strlen(subsys->model_number), ' ');
 	memcpy_and_pad(id->fr, sizeof(id->fr),
 		       UTS_RELEASE, strlen(UTS_RELEASE), ' ');
 

drivers/nvme/target/configfs.c

@@ -1118,16 +1118,12 @@ static ssize_t nvmet_subsys_attr_model_show(struct config_item *item,
 					    char *page)
 {
 	struct nvmet_subsys *subsys = to_subsys(item);
-	struct nvmet_subsys_model *subsys_model;
-	char *model = NVMET_DEFAULT_CTRL_MODEL;
 	int ret;
 
-	rcu_read_lock();
-	subsys_model = rcu_dereference(subsys->model);
-	if (subsys_model)
-		model = subsys_model->number;
-	ret = snprintf(page, PAGE_SIZE, "%s\n", model);
-	rcu_read_unlock();
+	mutex_lock(&subsys->lock);
+	ret = snprintf(page, PAGE_SIZE, "%s\n", subsys->model_number ?
+			subsys->model_number : NVMET_DEFAULT_CTRL_MODEL);
+	mutex_unlock(&subsys->lock);
 
 	return ret;
 }
@@ -1138,14 +1134,17 @@ static bool nvmet_is_ascii(const char c)
 	return c >= 0x20 && c <= 0x7e;
 }
 
-static ssize_t nvmet_subsys_attr_model_store(struct config_item *item,
-					     const char *page, size_t count)
+static ssize_t nvmet_subsys_attr_model_store_locked(struct nvmet_subsys *subsys,
+		const char *page, size_t count)
 {
-	struct nvmet_subsys *subsys = to_subsys(item);
-	struct nvmet_subsys_model *new_model;
-	char *new_model_number;
 	int pos = 0, len;
 
+	if (subsys->model_number) {
+		pr_err("Can't set model number. %s is already assigned\n",
+		       subsys->model_number);
+		return -EINVAL;
+	}
+
 	len = strcspn(page, "\n");
 	if (!len)
 		return -EINVAL;
@@ -1155,28 +1154,25 @@ static ssize_t nvmet_subsys_attr_model_store(struct config_item *item,
 			return -EINVAL;
 	}
 
-	new_model_number = kmemdup_nul(page, len, GFP_KERNEL);
-	if (!new_model_number)
+	subsys->model_number = kmemdup_nul(page, len, GFP_KERNEL);
+	if (!subsys->model_number)
 		return -ENOMEM;
+	return count;
+}
 
-	new_model = kzalloc(sizeof(*new_model) + len + 1, GFP_KERNEL);
-	if (!new_model) {
-		kfree(new_model_number);
-		return -ENOMEM;
-	}
-	memcpy(new_model->number, new_model_number, len);
+static ssize_t nvmet_subsys_attr_model_store(struct config_item *item,
+					     const char *page, size_t count)
+{
+	struct nvmet_subsys *subsys = to_subsys(item);
+	ssize_t ret;
 
 	down_write(&nvmet_config_sem);
 	mutex_lock(&subsys->lock);
-	new_model = rcu_replace_pointer(subsys->model, new_model,
-					mutex_is_locked(&subsys->lock));
+	ret = nvmet_subsys_attr_model_store_locked(subsys, page, count);
 	mutex_unlock(&subsys->lock);
 	up_write(&nvmet_config_sem);
 
-	kfree_rcu(new_model, rcuhead);
-	kfree(new_model_number);
-
-	return count;
+	return ret;
 }
 CONFIGFS_ATTR(nvmet_subsys_, attr_model);
 

drivers/nvme/target/core.c

@@ -1532,7 +1532,7 @@ static void nvmet_subsys_free(struct kref *ref)
 	nvmet_passthru_subsys_free(subsys);
 
 	kfree(subsys->subsysnqn);
-	kfree_rcu(subsys->model, rcuhead);
+	kfree(subsys->model_number);
 	kfree(subsys);
 }
 

drivers/nvme/target/nvmet.h

@@ -208,11 +208,6 @@ struct nvmet_ctrl {
 	bool			pi_support;
 };
 
-struct nvmet_subsys_model {
-	struct rcu_head		rcuhead;
-	char			number[];
-};
-
 struct nvmet_subsys {
 	enum nvme_subsys_type	type;
 
@@ -242,7 +237,7 @@ struct nvmet_subsys {
 	struct config_group	namespaces_group;
 	struct config_group	allowed_hosts_group;
 
-	struct nvmet_subsys_model	__rcu *model;
+	char			*model_number;
 
 #ifdef CONFIG_NVME_TARGET_PASSTHRU
 	struct nvme_ctrl	*passthru_ctrl;

include/linux/blkdev.h

@@ -65,8 +65,6 @@ typedef void (rq_end_io_fn)(struct request *, blk_status_t);
  * request flags */
 typedef __u32 __bitwise req_flags_t;
 
-/* elevator knows about this request */
-#define RQF_SORTED		((__force req_flags_t)(1 << 0))
 /* drive already may have started this one */
 #define RQF_STARTED		((__force req_flags_t)(1 << 1))
 /* may not be passed by ioscheduler */