Merge tag 'char-misc-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc updates from Greg KH:
 "Here is the big set of char/misc driver patches for 4.17-rc1.

  There are a lot of little things in here, nothing huge, but all
  important to the different hardware types involved:

   -  thunderbolt driver updates

   -  parport updates (people still care...)

   -  nvmem driver updates

   -  mei updates (as always)

   -  hwtracing driver updates

   -  hyperv driver updates

   -  extcon driver updates

   -  ... and a handful of even smaller driver subsystem and individual
      driver updates

  All of these have been in linux-next with no reported issues"

* tag 'char-misc-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (149 commits)
  hwtracing: Add HW tracing support menu
  intel_th: Add ACPI glue layer
  intel_th: Allow forcing host mode through drvdata
  intel_th: Pick up irq number from resources
  intel_th: Don't touch switch routing in host mode
  intel_th: Use correct method of finding hub
  intel_th: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate
  stm class: Make dummy's master/channel ranges configurable
  stm class: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate
  MAINTAINERS: Bestow upon myself the care for drivers/hwtracing
  hv: add SPDX license id to Kconfig
  hv: add SPDX license to trace
  Drivers: hv: vmbus: do not mark HV_PCIE as perf_device
  Drivers: hv: vmbus: respect what we get from hv_get_synint_state()
  /dev/mem: Avoid overwriting "err" in read_mem()
  eeprom: at24: use SPDX identifier instead of GPL boiler-plate
  eeprom: at24: simplify the i2c functionality checking
  eeprom: at24: fix a line break
  eeprom: at24: tweak newlines
  eeprom: at24: refactor at24_probe()
  ...

23 files changed, 408 insertions, 247 deletions

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 03605f8fc0dc..5d713008749b 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -75,7 +75,6 @@ config ATMEL_TCB_CLKSRC
 config ATMEL_TCB_CLKSRC_BLOCK
 	int
 	depends on ATMEL_TCB_CLKSRC
-	prompt "TC Block" if CPU_AT32AP700X
 	default 0
 	range 0 1
 	help
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index c3c8624f4d95..20be70c3f118 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -12,7 +12,7 @@ obj-$(CONFIG_ATMEL_SSC)		+= atmel-ssc.o
 obj-$(CONFIG_ATMEL_TCLIB)	+= atmel_tclib.o
 obj-$(CONFIG_DUMMY_IRQ)		+= dummy-irq.o
 obj-$(CONFIG_ICS932S401)	+= ics932s401.o
-obj-$(CONFIG_LKDTM)		+= lkdtm.o
+obj-$(CONFIG_LKDTM)		+= lkdtm/
 obj-$(CONFIG_TIFM_CORE)       	+= tifm_core.o
 obj-$(CONFIG_TIFM_7XX1)       	+= tifm_7xx1.o
 obj-$(CONFIG_PHANTOM)		+= phantom.o
@@ -57,21 +57,3 @@ obj-$(CONFIG_ASPEED_LPC_SNOOP)	+= aspeed-lpc-snoop.o
 obj-$(CONFIG_PCI_ENDPOINT_TEST)	+= pci_endpoint_test.o
 obj-$(CONFIG_OCXL)		+= ocxl/
 obj-$(CONFIG_MISC_RTSX)		+= cardreader/
-
-lkdtm-$(CONFIG_LKDTM)		+= lkdtm_core.o
-lkdtm-$(CONFIG_LKDTM)		+= lkdtm_bugs.o
-lkdtm-$(CONFIG_LKDTM)		+= lkdtm_heap.o
-lkdtm-$(CONFIG_LKDTM)		+= lkdtm_perms.o
-lkdtm-$(CONFIG_LKDTM)		+= lkdtm_refcount.o
-lkdtm-$(CONFIG_LKDTM)		+= lkdtm_rodata_objcopy.o
-lkdtm-$(CONFIG_LKDTM)		+= lkdtm_usercopy.o
-
-KCOV_INSTRUMENT_lkdtm_rodata.o	:= n
-
-OBJCOPYFLAGS :=
-OBJCOPYFLAGS_lkdtm_rodata_objcopy.o := \
-			--set-section-flags .text=alloc,readonly \
-			--rename-section .text=.rodata
-targets += lkdtm_rodata.o lkdtm_rodata_objcopy.o
-$(obj)/lkdtm_rodata_objcopy.o: $(obj)/lkdtm_rodata.o FORCE
-	$(call if_changed,objcopy)
diff --git a/drivers/misc/aspeed-lpc-ctrl.c b/drivers/misc/aspeed-lpc-ctrl.c
index b5439643f54b..a024f8042259 100644
--- a/drivers/misc/aspeed-lpc-ctrl.c
+++ b/drivers/misc/aspeed-lpc-ctrl.c
@@ -7,6 +7,7 @@
  * 2 of the License, or (at your option) any later version.
  */
 
+#include <linux/clk.h>
 #include <linux/mfd/syscon.h>
 #include <linux/miscdevice.h>
 #include <linux/mm.h>
@@ -20,12 +21,17 @@
 
 #define DEVICE_NAME	"aspeed-lpc-ctrl"
 
+#define HICR5 0x0
+#define HICR5_ENL2H	BIT(8)
+#define HICR5_ENFWH	BIT(10)
+
 #define HICR7 0x8
 #define HICR8 0xc
 
 struct aspeed_lpc_ctrl {
 	struct miscdevice	miscdev;
 	struct regmap		*regmap;
+	struct clk		*clk;
 	phys_addr_t		mem_base;
 	resource_size_t		mem_size;
 	u32		pnor_size;
@@ -153,8 +159,18 @@ static long aspeed_lpc_ctrl_ioctl(struct file *file, unsigned int cmd,
 		if (rc)
 			return rc;
 
-		return regmap_write(lpc_ctrl->regmap, HICR8,
-			(~(map.size - 1)) | ((map.size >> 16) - 1));
+		rc = regmap_write(lpc_ctrl->regmap, HICR8,
+				(~(map.size - 1)) | ((map.size >> 16) - 1));
+		if (rc)
+			return rc;
+
+		/*
+		 * Enable LPC FHW cycles. This is required for the host to
+		 * access the regions specified.
+		 */
+		return regmap_update_bits(lpc_ctrl->regmap, HICR5,
+				HICR5_ENFWH | HICR5_ENL2H,
+				HICR5_ENFWH | HICR5_ENL2H);
 	}
 
 	return -EINVAL;
@@ -221,16 +237,33 @@ static int aspeed_lpc_ctrl_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	lpc_ctrl->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(lpc_ctrl->clk)) {
+		dev_err(dev, "couldn't get clock\n");
+		return PTR_ERR(lpc_ctrl->clk);
+	}
+	rc = clk_prepare_enable(lpc_ctrl->clk);
+	if (rc) {
+		dev_err(dev, "couldn't enable clock\n");
+		return rc;
+	}
+
 	lpc_ctrl->miscdev.minor = MISC_DYNAMIC_MINOR;
 	lpc_ctrl->miscdev.name = DEVICE_NAME;
 	lpc_ctrl->miscdev.fops = &aspeed_lpc_ctrl_fops;
 	lpc_ctrl->miscdev.parent = dev;
 	rc = misc_register(&lpc_ctrl->miscdev);
-	if (rc)
+	if (rc) {
 		dev_err(dev, "Unable to register device\n");
-	else
-		dev_info(dev, "Loaded at %pr\n", &resm);
+		goto err;
+	}
+
+	dev_info(dev, "Loaded at %pr\n", &resm);
+
+	return 0;
 
+err:
+	clk_disable_unprepare(lpc_ctrl->clk);
 	return rc;
 }
 
@@ -239,6 +272,7 @@ static int aspeed_lpc_ctrl_remove(struct platform_device *pdev)
 	struct aspeed_lpc_ctrl *lpc_ctrl = dev_get_drvdata(&pdev->dev);
 
 	misc_deregister(&lpc_ctrl->miscdev);
+	clk_disable_unprepare(lpc_ctrl->clk);
 
 	return 0;
 }
diff --git a/drivers/misc/cardreader/rts5260.c b/drivers/misc/cardreader/rts5260.c
index 07cb93abf685..a493b01c5bc6 100644
--- a/drivers/misc/cardreader/rts5260.c
+++ b/drivers/misc/cardreader/rts5260.c
@@ -388,17 +388,17 @@ static void rts5260_disable_ocp(struct rtsx_pcr *pcr)
 				OC_POWER_DOWN);
 }
 
-int rts5260_get_ocpstat(struct rtsx_pcr *pcr, u8 *val)
+static int rts5260_get_ocpstat(struct rtsx_pcr *pcr, u8 *val)
 {
 	return rtsx_pci_read_register(pcr, REG_OCPSTAT, val);
 }
 
-int rts5260_get_ocpstat2(struct rtsx_pcr *pcr, u8 *val)
+static int rts5260_get_ocpstat2(struct rtsx_pcr *pcr, u8 *val)
 {
 	return rtsx_pci_read_register(pcr, REG_DV3318_OCPSTAT, val);
 }
 
-void rts5260_clear_ocpstat(struct rtsx_pcr *pcr)
+static void rts5260_clear_ocpstat(struct rtsx_pcr *pcr)
 {
 	u8 mask = 0;
 	u8 val = 0;
@@ -418,7 +418,7 @@ void rts5260_clear_ocpstat(struct rtsx_pcr *pcr)
 				DV3318_OCP_INT_CLR | DV3318_OCP_CLR, 0);
 }
 
-void rts5260_process_ocp(struct rtsx_pcr *pcr)
+static void rts5260_process_ocp(struct rtsx_pcr *pcr)
 {
 	if (!pcr->option.ocp_en)
 		return;
@@ -449,7 +449,7 @@ void rts5260_process_ocp(struct rtsx_pcr *pcr)
 	}
 }
 
-int rts5260_init_hw(struct rtsx_pcr *pcr)
+static int rts5260_init_hw(struct rtsx_pcr *pcr)
 {
 	int err;
 
@@ -620,7 +620,7 @@ static int rts5260_extra_init_hw(struct rtsx_pcr *pcr)
 	return 0;
 }
 
-void rts5260_set_aspm(struct rtsx_pcr *pcr, bool enable)
+static void rts5260_set_aspm(struct rtsx_pcr *pcr, bool enable)
 {
 	struct rtsx_cr_option *option = &pcr->option;
 	u8 val = 0;
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 01f9c4921c50..0c125f207aea 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -1,14 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * at24.c - handle most I2C EEPROMs
  *
  * Copyright (C) 2005-2007 David Brownell
  * Copyright (C) 2008 Wolfram Sang, Pengutronix
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
+
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/module.h>
@@ -63,8 +60,6 @@ struct at24_client {
 };
 
 struct at24_data {
-	struct at24_platform_data chip;
-
 	/*
 	 * Lock protects against activities from other Linux tasks,
 	 * but not from changes by other I2C masters.
@@ -75,7 +70,10 @@ struct at24_data {
 	unsigned int num_addresses;
 	unsigned int offset_adj;
 
-	struct nvmem_config nvmem_config;
+	u32 byte_len;
+	u16 page_size;
+	u8 flags;
+
 	struct nvmem_device *nvmem;
 
 	struct gpio_desc *wp_gpio;
@@ -239,8 +237,6 @@ static const struct acpi_device_id at24_acpi_ids[] = {
 };
 MODULE_DEVICE_TABLE(acpi, at24_acpi_ids);
 
-/*-------------------------------------------------------------------------*/
-
 /*
  * This routine supports chips which consume multiple I2C addresses. It
  * computes the addressing information to be used for a given r/w request.
@@ -255,7 +251,7 @@ static struct at24_client *at24_translate_offset(struct at24_data *at24,
 {
 	unsigned int i;
 
-	if (at24->chip.flags & AT24_FLAG_ADDR16) {
+	if (at24->flags & AT24_FLAG_ADDR16) {
 		i = *offset >> 16;
 		*offset &= 0xffff;
 	} else {
@@ -266,6 +262,11 @@ static struct at24_client *at24_translate_offset(struct at24_data *at24,
 	return &at24->client[i];
 }
 
+static struct device *at24_base_client_dev(struct at24_data *at24)
+{
+	return &at24->client[0].client->dev;
+}
+
 static size_t at24_adjust_read_count(struct at24_data *at24,
 				      unsigned int offset, size_t count)
 {
@@ -277,8 +278,8 @@ static size_t at24_adjust_read_count(struct at24_data *at24,
 	 * the next slave address: truncate the count to the slave boundary,
 	 * so that the read never straddles slaves.
 	 */
-	if (at24->chip.flags & AT24_FLAG_NO_RDROL) {
-		bits = (at24->chip.flags & AT24_FLAG_ADDR16) ? 16 : 8;
+	if (at24->flags & AT24_FLAG_NO_RDROL) {
+		bits = (at24->flags & AT24_FLAG_ADDR16) ? 16 : 8;
 		remainder = BIT(bits) - offset;
 		if (count > remainder)
 			count = remainder;
@@ -337,7 +338,7 @@ static size_t at24_adjust_write_count(struct at24_data *at24,
 		count = at24->write_max;
 
 	/* Never roll over backwards, to the start of this page */
-	next_page = roundup(offset + 1, at24->chip.page_size);
+	next_page = roundup(offset + 1, at24->page_size);
 	if (offset + count > next_page)
 		count = next_page - offset;
 
@@ -371,15 +372,18 @@ static ssize_t at24_regmap_write(struct at24_data *at24, const char *buf,
 
 static int at24_read(void *priv, unsigned int off, void *val, size_t count)
 {
-	struct at24_data *at24 = priv;
-	struct device *dev = &at24->client[0].client->dev;
+	struct at24_data *at24;
+	struct device *dev;
 	char *buf = val;
 	int ret;
 
+	at24 = priv;
+	dev = at24_base_client_dev(at24);
+
 	if (unlikely(!count))
 		return count;
 
-	if (off + count > at24->chip.byte_len)
+	if (off + count > at24->byte_len)
 		return -EINVAL;
 
 	ret = pm_runtime_get_sync(dev);
@@ -395,17 +399,15 @@ static int at24_read(void *priv, unsigned int off, void *val, size_t count)
 	mutex_lock(&at24->lock);
 
 	while (count) {
-		int	status;
-
-		status = at24_regmap_read(at24, buf, off, count);
-		if (status < 0) {
+		ret = at24_regmap_read(at24, buf, off, count);
+		if (ret < 0) {
 			mutex_unlock(&at24->lock);
 			pm_runtime_put(dev);
-			return status;
+			return ret;
 		}
-		buf += status;
-		off += status;
-		count -= status;
+		buf += ret;
+		off += ret;
+		count -= ret;
 	}
 
 	mutex_unlock(&at24->lock);
@@ -417,15 +419,18 @@ static int at24_read(void *priv, unsigned int off, void *val, size_t count)
 
 static int at24_write(void *priv, unsigned int off, void *val, size_t count)
 {
-	struct at24_data *at24 = priv;
-	struct device *dev = &at24->client[0].client->dev;
+	struct at24_data *at24;
+	struct device *dev;
 	char *buf = val;
 	int ret;
 
+	at24 = priv;
+	dev = at24_base_client_dev(at24);
+
 	if (unlikely(!count))
 		return -EINVAL;
 
-	if (off + count > at24->chip.byte_len)
+	if (off + count > at24->byte_len)
 		return -EINVAL;
 
 	ret = pm_runtime_get_sync(dev);
@@ -442,18 +447,16 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count)
 	gpiod_set_value_cansleep(at24->wp_gpio, 0);
 
 	while (count) {
-		int status;
-
-		status = at24_regmap_write(at24, buf, off, count);
-		if (status < 0) {
+		ret = at24_regmap_write(at24, buf, off, count);
+		if (ret < 0) {
 			gpiod_set_value_cansleep(at24->wp_gpio, 1);
 			mutex_unlock(&at24->lock);
 			pm_runtime_put(dev);
-			return status;
+			return ret;
 		}
-		buf += status;
-		off += status;
-		count -= status;
+		buf += ret;
+		off += ret;
+		count -= ret;
 	}
 
 	gpiod_set_value_cansleep(at24->wp_gpio, 1);
@@ -464,7 +467,8 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count)
 	return 0;
 }
 
-static void at24_get_pdata(struct device *dev, struct at24_platform_data *chip)
+static void at24_properties_to_pdata(struct device *dev,
+				     struct at24_platform_data *chip)
 {
 	int err;
 	u32 val;
@@ -491,6 +495,43 @@ static void at24_get_pdata(struct device *dev, struct at24_platform_data *chip)
 	}
 }
 
+static int at24_get_pdata(struct device *dev, struct at24_platform_data *pdata)
+{
+	struct device_node *of_node = dev->of_node;
+	const struct at24_chip_data *cdata;
+	const struct i2c_device_id *id;
+	struct at24_platform_data *pd;
+
+	pd = dev_get_platdata(dev);
+	if (pd) {
+		memcpy(pdata, pd, sizeof(*pdata));
+		return 0;
+	}
+
+	id = i2c_match_id(at24_ids, to_i2c_client(dev));
+
+	/*
+	 * The I2C core allows OF nodes compatibles to match against the
+	 * I2C device ID table as a fallback, so check not only if an OF
+	 * node is present but also if it matches an OF device ID entry.
+	 */
+	if (of_node && of_match_device(at24_of_match, dev))
+		cdata = of_device_get_match_data(dev);
+	else if (id)
+		cdata = (void *)&id->driver_data;
+	else
+		cdata = acpi_device_get_match_data(dev);
+
+	if (!cdata)
+		return -ENODEV;
+
+	pdata->byte_len = cdata->byte_len;
+	pdata->flags = cdata->flags;
+	at24_properties_to_pdata(dev, pdata);
+
+	return 0;
+}
+
 static unsigned int at24_get_offset_adj(u8 flags, unsigned int byte_len)
 {
 	if (flags & AT24_FLAG_MAC) {
@@ -514,102 +555,83 @@ static unsigned int at24_get_offset_adj(u8 flags, unsigned int byte_len)
 	}
 }
 
-static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id)
+static int at24_probe(struct i2c_client *client)
 {
-	struct at24_platform_data chip = { 0 };
-	const struct at24_chip_data *cd = NULL;
-	bool writable;
-	struct at24_data *at24;
-	int err;
-	unsigned int i, num_addresses;
 	struct regmap_config regmap_config = { };
+	struct nvmem_config nvmem_config = { };
+	struct at24_platform_data pdata = { };
+	struct device *dev = &client->dev;
+	bool i2c_fn_i2c, i2c_fn_block;
+	unsigned int i, num_addresses;
+	struct at24_data *at24;
+	struct regmap *regmap;
+	size_t at24_size;
+	bool writable;
 	u8 test_byte;
+	int err;
 
-	if (client->dev.platform_data) {
-		chip = *(struct at24_platform_data *)client->dev.platform_data;
-	} else {
-		/*
-		 * The I2C core allows OF nodes compatibles to match against the
-		 * I2C device ID table as a fallback, so check not only if an OF
-		 * node is present but also if it matches an OF device ID entry.
-		 */
-		if (client->dev.of_node &&
-		    of_match_device(at24_of_match, &client->dev)) {
-			cd = of_device_get_match_data(&client->dev);
-		} else if (id) {
-			cd = (void *)id->driver_data;
-		} else {
-			const struct acpi_device_id *aid;
-
-			aid = acpi_match_device(at24_acpi_ids, &client->dev);
-			if (aid)
-				cd = (void *)aid->driver_data;
-		}
-		if (!cd)
-			return -ENODEV;
+	i2c_fn_i2c = i2c_check_functionality(client->adapter, I2C_FUNC_I2C);
+	i2c_fn_block = i2c_check_functionality(client->adapter,
+					       I2C_FUNC_SMBUS_WRITE_I2C_BLOCK);
 
-		chip.byte_len = cd->byte_len;
-		chip.flags = cd->flags;
-		at24_get_pdata(&client->dev, &chip);
-	}
+	err = at24_get_pdata(dev, &pdata);
+	if (err)
+		return err;
+
+	if (!i2c_fn_i2c && !i2c_fn_block)
+		pdata.page_size = 1;
 
-	if (!is_power_of_2(chip.byte_len))
-		dev_warn(&client->dev,
-			"byte_len looks suspicious (no power of 2)!\n");
-	if (!chip.page_size) {
-		dev_err(&client->dev, "page_size must not be 0!\n");
+	if (!pdata.page_size) {
+		dev_err(dev, "page_size must not be 0!\n");
 		return -EINVAL;
 	}
-	if (!is_power_of_2(chip.page_size))
-		dev_warn(&client->dev,
-			"page_size looks suspicious (no power of 2)!\n");
 
-	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C) &&
-	    !i2c_check_functionality(client->adapter,
-				     I2C_FUNC_SMBUS_WRITE_I2C_BLOCK))
-		chip.page_size = 1;
+	if (!is_power_of_2(pdata.page_size))
+		dev_warn(dev, "page_size looks suspicious (no power of 2)!\n");
 
-	if (chip.flags & AT24_FLAG_TAKE8ADDR)
+	if (pdata.flags & AT24_FLAG_TAKE8ADDR)
 		num_addresses = 8;
 	else
-		num_addresses =	DIV_ROUND_UP(chip.byte_len,
-			(chip.flags & AT24_FLAG_ADDR16) ? 65536 : 256);
+		num_addresses =	DIV_ROUND_UP(pdata.byte_len,
+			(pdata.flags & AT24_FLAG_ADDR16) ? 65536 : 256);
+
+	if ((pdata.flags & AT24_FLAG_SERIAL) && (pdata.flags & AT24_FLAG_MAC)) {
+		dev_err(dev,
+			"invalid device data - cannot have both AT24_FLAG_SERIAL & AT24_FLAG_MAC.");
+		return -EINVAL;
+	}
 
 	regmap_config.val_bits = 8;
-	regmap_config.reg_bits = (chip.flags & AT24_FLAG_ADDR16) ? 16 : 8;
+	regmap_config.reg_bits = (pdata.flags & AT24_FLAG_ADDR16) ? 16 : 8;
+	regmap_config.disable_locking = true;
 
-	at24 = devm_kzalloc(&client->dev, sizeof(struct at24_data) +
-		num_addresses * sizeof(struct at24_client), GFP_KERNEL);
+	regmap = devm_regmap_init_i2c(client, &regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	at24_size = sizeof(*at24) + num_addresses * sizeof(struct at24_client);
+	at24 = devm_kzalloc(dev, at24_size, GFP_KERNEL);
 	if (!at24)
 		return -ENOMEM;
 
 	mutex_init(&at24->lock);
-	at24->chip = chip;
+	at24->byte_len = pdata.byte_len;
+	at24->page_size = pdata.page_size;
+	at24->flags = pdata.flags;
 	at24->num_addresses = num_addresses;
-	at24->offset_adj = at24_get_offset_adj(chip.flags, chip.byte_len);
+	at24->offset_adj = at24_get_offset_adj(pdata.flags, pdata.byte_len);
+	at24->client[0].client = client;
+	at24->client[0].regmap = regmap;
 
-	at24->wp_gpio = devm_gpiod_get_optional(&client->dev,
-						"wp", GPIOD_OUT_HIGH);
+	at24->wp_gpio = devm_gpiod_get_optional(dev, "wp", GPIOD_OUT_HIGH);
 	if (IS_ERR(at24->wp_gpio))
 		return PTR_ERR(at24->wp_gpio);
 
-	at24->client[0].client = client;
-	at24->client[0].regmap = devm_regmap_init_i2c(client, &regmap_config);
-	if (IS_ERR(at24->client[0].regmap))
-		return PTR_ERR(at24->client[0].regmap);
-
-	if ((chip.flags & AT24_FLAG_SERIAL) && (chip.flags & AT24_FLAG_MAC)) {
-		dev_err(&client->dev,
-			"invalid device data - cannot have both AT24_FLAG_SERIAL & AT24_FLAG_MAC.");
-		return -EINVAL;
-	}
-
-	writable = !(chip.flags & AT24_FLAG_READONLY);
+	writable = !(pdata.flags & AT24_FLAG_READONLY);
 	if (writable) {
 		at24->write_max = min_t(unsigned int,
-					chip.page_size, at24_io_limit);
-		if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C) &&
-		    at24->write_max > I2C_SMBUS_BLOCK_MAX)
+					pdata.page_size, at24_io_limit);
+		if (!i2c_fn_i2c && at24->write_max > I2C_SMBUS_BLOCK_MAX)
 			at24->write_max = I2C_SMBUS_BLOCK_MAX;
 	}
 
@@ -618,8 +640,8 @@ static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		at24->client[i].client = i2c_new_dummy(client->adapter,
 						       client->addr + i);
 		if (!at24->client[i].client) {
-			dev_err(&client->dev, "address 0x%02x unavailable\n",
-					client->addr + i);
+			dev_err(dev, "address 0x%02x unavailable\n",
+				client->addr + i);
 			err = -EADDRINUSE;
 			goto err_clients;
 		}
@@ -635,48 +657,47 @@ static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	i2c_set_clientdata(client, at24);
 
 	/* enable runtime pm */
-	pm_runtime_set_active(&client->dev);
-	pm_runtime_enable(&client->dev);
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
 
 	/*
 	 * Perform a one-byte test read to verify that the
 	 * chip is functional.
 	 */
 	err = at24_read(at24, 0, &test_byte, 1);
-	pm_runtime_idle(&client->dev);
+	pm_runtime_idle(dev);
 	if (err) {
 		err = -ENODEV;
 		goto err_clients;
 	}
 
-	at24->nvmem_config.name = dev_name(&client->dev);
-	at24->nvmem_config.dev = &client->dev;
-	at24->nvmem_config.read_only = !writable;
-	at24->nvmem_config.root_only = true;
-	at24->nvmem_config.owner = THIS_MODULE;
-	at24->nvmem_config.compat = true;
-	at24->nvmem_config.base_dev = &client->dev;
-	at24->nvmem_config.reg_read = at24_read;
-	at24->nvmem_config.reg_write = at24_write;
-	at24->nvmem_config.priv = at24;
-	at24->nvmem_config.stride = 1;
-	at24->nvmem_config.word_size = 1;
-	at24->nvmem_config.size = chip.byte_len;
-
-	at24->nvmem = nvmem_register(&at24->nvmem_config);
-
+	nvmem_config.name = dev_name(dev);
+	nvmem_config.dev = dev;
+	nvmem_config.read_only = !writable;
+	nvmem_config.root_only = true;
+	nvmem_config.owner = THIS_MODULE;
+	nvmem_config.compat = true;
+	nvmem_config.base_dev = dev;
+	nvmem_config.reg_read = at24_read;
+	nvmem_config.reg_write = at24_write;
+	nvmem_config.priv = at24;
+	nvmem_config.stride = 1;
+	nvmem_config.word_size = 1;
+	nvmem_config.size = pdata.byte_len;
+
+	at24->nvmem = nvmem_register(&nvmem_config);
 	if (IS_ERR(at24->nvmem)) {
 		err = PTR_ERR(at24->nvmem);
 		goto err_clients;
 	}
 
-	dev_info(&client->dev, "%u byte %s EEPROM, %s, %u bytes/write\n",
-		chip.byte_len, client->name,
-		writable ? "writable" : "read-only", at24->write_max);
+	dev_info(dev, "%u byte %s EEPROM, %s, %u bytes/write\n",
+		 pdata.byte_len, client->name,
+		 writable ? "writable" : "read-only", at24->write_max);
 
 	/* export data to kernel code */
-	if (chip.setup)
-		chip.setup(at24->nvmem, chip.context);
+	if (pdata.setup)
+		pdata.setup(at24->nvmem, pdata.context);
 
 	return 0;
 
@@ -685,7 +706,7 @@ err_clients:
 		if (at24->client[i].client)
 			i2c_unregister_device(at24->client[i].client);
 
-	pm_runtime_disable(&client->dev);
+	pm_runtime_disable(dev);
 
 	return err;
 }
@@ -708,15 +729,13 @@ static int at24_remove(struct i2c_client *client)
 	return 0;
 }
 
-/*-------------------------------------------------------------------------*/
-
 static struct i2c_driver at24_driver = {
 	.driver = {
 		.name = "at24",
 		.of_match_table = at24_of_match,
 		.acpi_match_table = ACPI_PTR(at24_acpi_ids),
 	},
-	.probe = at24_probe,
+	.probe_new = at24_probe,
 	.remove = at24_remove,
 	.id_table = at24_ids,
 };
diff --git a/drivers/misc/eeprom/at25.c b/drivers/misc/eeprom/at25.c
index 9282ffd607ff..6a7d4a2ad514 100644
--- a/drivers/misc/eeprom/at25.c
+++ b/drivers/misc/eeprom/at25.c
@@ -102,7 +102,7 @@ static int at25_ee_read(void *priv, unsigned int offset,
 	}
 
 	spi_message_init(&m);
-	memset(t, 0, sizeof t);
+	memset(t, 0, sizeof(t));
 
 	t[0].tx_buf = command;
 	t[0].len = at25->addrlen + 1;
diff --git a/drivers/misc/lkdtm/Makefile b/drivers/misc/lkdtm/Makefile
new file mode 100644
index 000000000000..3370a4138e94
--- /dev/null
+++ b/drivers/misc/lkdtm/Makefile
@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_LKDTM)		+= lkdtm.o
+
+lkdtm-$(CONFIG_LKDTM)		+= core.o
+lkdtm-$(CONFIG_LKDTM)		+= bugs.o
+lkdtm-$(CONFIG_LKDTM)		+= heap.o
+lkdtm-$(CONFIG_LKDTM)		+= perms.o
+lkdtm-$(CONFIG_LKDTM)		+= refcount.o
+lkdtm-$(CONFIG_LKDTM)		+= rodata_objcopy.o
+lkdtm-$(CONFIG_LKDTM)		+= usercopy.o
+
+KCOV_INSTRUMENT_rodata.o	:= n
+
+OBJCOPYFLAGS :=
+OBJCOPYFLAGS_rodata_objcopy.o	:= \
+			--set-section-flags .text=alloc,readonly \
+			--rename-section .text=.rodata
+targets += rodata.o rodata_objcopy.o
+$(obj)/rodata_objcopy.o: $(obj)/rodata.o FORCE
+	$(call if_changed,objcopy)
diff --git a/drivers/misc/lkdtm_bugs.c b/drivers/misc/lkdtm/bugs.c
index 7eebbdfbcacd..7eebbdfbcacd 100644
--- a/drivers/misc/lkdtm_bugs.c
+++ b/drivers/misc/lkdtm/bugs.c
diff --git a/drivers/misc/lkdtm_core.c b/drivers/misc/lkdtm/core.c
index 2154d1bfd18b..2154d1bfd18b 100644
--- a/drivers/misc/lkdtm_core.c
+++ b/drivers/misc/lkdtm/core.c
diff --git a/drivers/misc/lkdtm_heap.c b/drivers/misc/lkdtm/heap.c
index 65026d7de130..65026d7de130 100644
--- a/drivers/misc/lkdtm_heap.c
+++ b/drivers/misc/lkdtm/heap.c
diff --git a/drivers/misc/lkdtm.h b/drivers/misc/lkdtm/lkdtm.h
index 9e513dcfd809..9e513dcfd809 100644
--- a/drivers/misc/lkdtm.h
+++ b/drivers/misc/lkdtm/lkdtm.h
diff --git a/drivers/misc/lkdtm_perms.c b/drivers/misc/lkdtm/perms.c
index 53b85c9d16b8..53b85c9d16b8 100644
--- a/drivers/misc/lkdtm_perms.c
+++ b/drivers/misc/lkdtm/perms.c
diff --git a/drivers/misc/lkdtm_refcount.c b/drivers/misc/lkdtm/refcount.c
index 2b99d448e7fd..0a146b32da13 100644
--- a/drivers/misc/lkdtm_refcount.c
+++ b/drivers/misc/lkdtm/refcount.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * This is for all the tests related to refcount bugs (e.g. overflow,
  * underflow, reaching zero untested, etc).
diff --git a/drivers/misc/lkdtm_rodata.c b/drivers/misc/lkdtm/rodata.c
index 58d180af72cf..58d180af72cf 100644
--- a/drivers/misc/lkdtm_rodata.c
+++ b/drivers/misc/lkdtm/rodata.c
diff --git a/drivers/misc/lkdtm_usercopy.c b/drivers/misc/lkdtm/usercopy.c
index 9725aed305bb..9725aed305bb 100644
--- a/drivers/misc/lkdtm_usercopy.c
+++ b/drivers/misc/lkdtm/usercopy.c
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index 772d02922529..b1133739fb4b 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -74,6 +74,23 @@ ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
 		goto out;
 	}
 
+	while (cl->tx_cb_queued >= bus->tx_queue_limit) {
+		mutex_unlock(&bus->device_lock);
+		rets = wait_event_interruptible(cl->tx_wait,
+				cl->writing_state == MEI_WRITE_COMPLETE ||
+				(!mei_cl_is_connected(cl)));
+		mutex_lock(&bus->device_lock);
+		if (rets) {
+			if (signal_pending(current))
+				rets = -EINTR;
+			goto out;
+		}
+		if (!mei_cl_is_connected(cl)) {
+			rets = -ENODEV;
+			goto out;
+		}
+	}
+
 	cb = mei_cl_alloc_cb(cl, length, MEI_FOP_WRITE, NULL);
 	if (!cb) {
 		rets = -ENOMEM;
@@ -450,6 +467,29 @@ bool mei_cldev_enabled(struct mei_cl_device *cldev)
 EXPORT_SYMBOL_GPL(mei_cldev_enabled);
 
 /**
+ * mei_cl_bus_module_get - acquire module of the underlying
+ *    hw driver.
+ *
+ * @cldev: mei client device
+ *
+ * Return: true on success; false if the module was removed.
+ */
+static bool mei_cl_bus_module_get(struct mei_cl_device *cldev)
+{
+	return try_module_get(cldev->bus->dev->driver->owner);
+}
+
+/**
+ * mei_cl_bus_module_put -  release the underlying hw module.
+ *
+ * @cldev: mei client device
+ */
+static void mei_cl_bus_module_put(struct mei_cl_device *cldev)
+{
+	module_put(cldev->bus->dev->driver->owner);
+}
+
+/**
  * mei_cldev_enable - enable me client device
  *     create connection with me client
  *
@@ -487,9 +527,17 @@ int mei_cldev_enable(struct mei_cl_device *cldev)
 		goto out;
 	}
 
+	if (!mei_cl_bus_module_get(cldev)) {
+		dev_err(&cldev->dev, "get hw module failed");
+		ret = -ENODEV;
+		goto out;
+	}
+
 	ret = mei_cl_connect(cl, cldev->me_cl, NULL);
-	if (ret < 0)
+	if (ret < 0) {
 		dev_err(&cldev->dev, "cannot connect\n");
+		mei_cl_bus_module_put(cldev);
+	}
 
 out:
 	mutex_unlock(&bus->device_lock);
@@ -553,6 +601,8 @@ int mei_cldev_disable(struct mei_cl_device *cldev)
 		dev_err(bus->dev, "Could not disconnect from the ME client\n");
 
 out:
+	mei_cl_bus_module_put(cldev);
+
 	/* Flush queues and remove any pending read */
 	mei_cl_flush_queues(cl, NULL);
 	mei_cl_unlink(cl);
@@ -563,37 +613,6 @@ out:
 EXPORT_SYMBOL_GPL(mei_cldev_disable);
 
 /**
- * mei_cl_bus_module_get - acquire module of the underlying
- *    hw module.
- *
- * @cl: host client
- *
- * Return: true on success; false if the module was removed.
- */
-bool mei_cl_bus_module_get(struct mei_cl *cl)
-{
-	struct mei_cl_device *cldev = cl->cldev;
-
-	if (!cldev)
-		return true;
-
-	return try_module_get(cldev->bus->dev->driver->owner);
-}
-
-/**
- * mei_cl_bus_module_put -  release the underlying hw module.
- *
- * @cl: host client
- */
-void mei_cl_bus_module_put(struct mei_cl *cl)
-{
-	struct mei_cl_device *cldev = cl->cldev;
-
-	if (cldev)
-		module_put(cldev->bus->dev->driver->owner);
-}
-
-/**
  * mei_cl_device_find - find matching entry in the driver id table
  *
  * @cldev: me client device
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 7e60c1817c31..8d6197a88b54 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -350,6 +350,36 @@ void mei_io_cb_free(struct mei_cl_cb *cb)
 }
 
 /**
+ * mei_tx_cb_queue - queue tx callback
+ *
+ * Locking: called under "dev->device_lock" lock
+ *
+ * @cb: mei callback struct
+ * @head: an instance of list to queue on
+ */
+static inline void mei_tx_cb_enqueue(struct mei_cl_cb *cb,
+				     struct list_head *head)
+{
+	list_add_tail(&cb->list, head);
+	cb->cl->tx_cb_queued++;
+}
+
+/**
+ * mei_tx_cb_dequeue - dequeue tx callback
+ *
+ * Locking: called under "dev->device_lock" lock
+ *
+ * @cb: mei callback struct to dequeue and free
+ */
+static inline void mei_tx_cb_dequeue(struct mei_cl_cb *cb)
+{
+	if (!WARN_ON(cb->cl->tx_cb_queued == 0))
+		cb->cl->tx_cb_queued--;
+
+	mei_io_cb_free(cb);
+}
+
+/**
  * mei_io_cb_init - allocate and initialize io callback
  *
  * @cl: mei client
@@ -377,49 +407,37 @@ static struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl,
 }
 
 /**
- * __mei_io_list_flush_cl - removes and frees cbs belonging to cl.
+ * mei_io_list_flush_cl - removes cbs belonging to the cl.
  *
  * @head:  an instance of our list structure
- * @cl:    host client, can be NULL for flushing the whole list
- * @free:  whether to free the cbs
+ * @cl:    host client
  */
-static void __mei_io_list_flush_cl(struct list_head *head,
-				   const struct mei_cl *cl, bool free)
+static void mei_io_list_flush_cl(struct list_head *head,
+				 const struct mei_cl *cl)
 {
 	struct mei_cl_cb *cb, *next;
 
-	/* enable removing everything if no cl is specified */
 	list_for_each_entry_safe(cb, next, head, list) {
-		if (!cl || mei_cl_cmp_id(cl, cb->cl)) {
+		if (mei_cl_cmp_id(cl, cb->cl))
 			list_del_init(&cb->list);
-			if (free)
-				mei_io_cb_free(cb);
-		}
 	}
 }
 
 /**
- * mei_io_list_flush_cl - removes list entry belonging to cl.
+ * mei_io_tx_list_free_cl - removes cb belonging to the cl and free them
  *
  * @head: An instance of our list structure
  * @cl: host client
  */
-static inline void mei_io_list_flush_cl(struct list_head *head,
-					const struct mei_cl *cl)
+static void mei_io_tx_list_free_cl(struct list_head *head,
+				   const struct mei_cl *cl)
 {
-	__mei_io_list_flush_cl(head, cl, false);
-}
+	struct mei_cl_cb *cb, *next;
 
-/**
- * mei_io_list_free_cl - removes cb belonging to cl and free them
- *
- * @head: An instance of our list structure
- * @cl: host client
- */
-static inline void mei_io_list_free_cl(struct list_head *head,
-				       const struct mei_cl *cl)
-{
-	__mei_io_list_flush_cl(head, cl, true);
+	list_for_each_entry_safe(cb, next, head, list) {
+		if (mei_cl_cmp_id(cl, cb->cl))
+			mei_tx_cb_dequeue(cb);
+	}
 }
 
 /**
@@ -538,8 +556,8 @@ int mei_cl_flush_queues(struct mei_cl *cl, const struct file *fp)
 	dev = cl->dev;
 
 	cl_dbg(dev, cl, "remove list entry belonging to cl\n");
-	mei_io_list_free_cl(&cl->dev->write_list, cl);
-	mei_io_list_free_cl(&cl->dev->write_waiting_list, cl);
+	mei_io_tx_list_free_cl(&cl->dev->write_list, cl);
+	mei_io_tx_list_free_cl(&cl->dev->write_waiting_list, cl);
 	mei_io_list_flush_cl(&cl->dev->ctrl_wr_list, cl);
 	mei_io_list_flush_cl(&cl->dev->ctrl_rd_list, cl);
 	mei_io_list_free_fp(&cl->rd_pending, fp);
@@ -756,8 +774,8 @@ static void mei_cl_set_disconnected(struct mei_cl *cl)
 		return;
 
 	cl->state = MEI_FILE_DISCONNECTED;
-	mei_io_list_free_cl(&dev->write_list, cl);
-	mei_io_list_free_cl(&dev->write_waiting_list, cl);
+	mei_io_tx_list_free_cl(&dev->write_list, cl);
+	mei_io_tx_list_free_cl(&dev->write_waiting_list, cl);
 	mei_io_list_flush_cl(&dev->ctrl_rd_list, cl);
 	mei_io_list_flush_cl(&dev->ctrl_wr_list, cl);
 	mei_cl_wake_all(cl);
@@ -765,8 +783,6 @@ static void mei_cl_set_disconnected(struct mei_cl *cl)
 	cl->tx_flow_ctrl_creds = 0;
 	cl->timer_count = 0;
 
-	mei_cl_bus_module_put(cl);
-
 	if (!cl->me_cl)
 		return;
 
@@ -1076,9 +1092,6 @@ int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
 
 	dev = cl->dev;
 
-	if (!mei_cl_bus_module_get(cl))
-		return -ENODEV;
-
 	rets = mei_cl_set_connecting(cl, me_cl);
 	if (rets)
 		goto nortpm;
@@ -1698,9 +1711,9 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb)
 
 out:
 	if (mei_hdr.msg_complete)
-		list_add_tail(&cb->list, &dev->write_waiting_list);
+		mei_tx_cb_enqueue(cb, &dev->write_waiting_list);
 	else
-		list_add_tail(&cb->list, &dev->write_list);
+		mei_tx_cb_enqueue(cb, &dev->write_list);
 
 	cb = NULL;
 	if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) {
@@ -1746,7 +1759,7 @@ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb)
 
 	switch (cb->fop_type) {
 	case MEI_FOP_WRITE:
-		mei_io_cb_free(cb);
+		mei_tx_cb_dequeue(cb);
 		cl->writing_state = MEI_WRITE_COMPLETE;
 		if (waitqueue_active(&cl->tx_wait)) {
 			wake_up_interruptible(&cl->tx_wait);
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index a617aa5a3ad8..c815da91089c 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -97,7 +97,7 @@ static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
 	int pos = 0;
 	int ret;
 
-#define HDR "   |me|host|state|rd|wr|\n"
+#define HDR "   |me|host|state|rd|wr|wrq\n"
 
 	if (!dev)
 		return -ENODEV;
@@ -130,9 +130,10 @@ static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
 	list_for_each_entry(cl, &dev->file_list, link) {
 
 		pos += scnprintf(buf + pos, bufsz - pos,
-			"%3d|%2d|%4d|%5d|%2d|%2d|\n",
+			"%3d|%2d|%4d|%5d|%2d|%2d|%3u\n",
 			i, mei_cl_me_id(cl), cl->host_client_id, cl->state,
-			!list_empty(&cl->rd_completed), cl->writing_state);
+			!list_empty(&cl->rd_completed), cl->writing_state,
+			cl->tx_cb_queued);
 		i++;
 	}
 out:
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index c46f6e99a55e..4888ebc076b7 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -383,6 +383,7 @@ void mei_device_init(struct mei_device *dev,
 	INIT_LIST_HEAD(&dev->write_waiting_list);
 	INIT_LIST_HEAD(&dev->ctrl_wr_list);
 	INIT_LIST_HEAD(&dev->ctrl_rd_list);
+	dev->tx_queue_limit = MEI_TX_QUEUE_LIMIT_DEFAULT;
 
 	INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
 	INIT_WORK(&dev->reset_work, mei_reset_work);
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 758dc73602d5..7465f17e1559 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -291,6 +291,27 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
 		goto out;
 	}
 
+	while (cl->tx_cb_queued >= dev->tx_queue_limit) {
+		if (file->f_flags & O_NONBLOCK) {
+			rets = -EAGAIN;
+			goto out;
+		}
+		mutex_unlock(&dev->device_lock);
+		rets = wait_event_interruptible(cl->tx_wait,
+				cl->writing_state == MEI_WRITE_COMPLETE ||
+				(!mei_cl_is_connected(cl)));
+		mutex_lock(&dev->device_lock);
+		if (rets) {
+			if (signal_pending(current))
+				rets = -EINTR;
+			goto out;
+		}
+		if (!mei_cl_is_connected(cl)) {
+			rets = -ENODEV;
+			goto out;
+		}
+	}
+
 	*offset = 0;
 	cb = mei_cl_alloc_cb(cl, length, MEI_FOP_WRITE, file);
 	if (!cb) {
@@ -507,7 +528,6 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
 		break;
 
 	default:
-		dev_err(dev->dev, ": unsupported ioctl %d.\n", cmd);
 		rets = -ENOIOCTLCMD;
 	}
 
@@ -580,6 +600,12 @@ static __poll_t mei_poll(struct file *file, poll_table *wait)
 			mei_cl_read_start(cl, mei_cl_mtu(cl), file);
 	}
 
+	if (req_events & (POLLOUT | POLLWRNORM)) {
+		poll_wait(file, &cl->tx_wait, wait);
+		if (cl->tx_cb_queued < dev->tx_queue_limit)
+			mask |= POLLOUT | POLLWRNORM;
+	}
+
 out:
 	mutex_unlock(&dev->device_lock);
 	return mask;
@@ -749,10 +775,48 @@ static ssize_t hbm_ver_drv_show(struct device *device,
 }
 static DEVICE_ATTR_RO(hbm_ver_drv);
 
+static ssize_t tx_queue_limit_show(struct device *device,
+				   struct device_attribute *attr, char *buf)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+	u8 size = 0;
+
+	mutex_lock(&dev->device_lock);
+	size = dev->tx_queue_limit;
+	mutex_unlock(&dev->device_lock);
+
+	return snprintf(buf, PAGE_SIZE, "%u\n", size);
+}
+
+static ssize_t tx_queue_limit_store(struct device *device,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+	u8 limit;
+	unsigned int inp;
+	int err;
+
+	err = kstrtouint(buf, 10, &inp);
+	if (err)
+		return err;
+	if (inp > MEI_TX_QUEUE_LIMIT_MAX || inp < MEI_TX_QUEUE_LIMIT_MIN)
+		return -EINVAL;
+	limit = inp;
+
+	mutex_lock(&dev->device_lock);
+	dev->tx_queue_limit = limit;
+	mutex_unlock(&dev->device_lock);
+
+	return count;
+}
+static DEVICE_ATTR_RW(tx_queue_limit);
+
 static struct attribute *mei_attrs[] = {
 	&dev_attr_fw_status.attr,
 	&dev_attr_hbm_ver.attr,
 	&dev_attr_hbm_ver_drv.attr,
+	&dev_attr_tx_queue_limit.attr,
 	NULL
 };
 ATTRIBUTE_GROUPS(mei);
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index ebcd5132e447..be9c48415da9 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -210,6 +210,7 @@ struct mei_cl_cb {
  * @timer_count:  watchdog timer for operation completion
  * @notify_en: notification - enabled/disabled
  * @notify_ev: pending notification event
+ * @tx_cb_queued: number of tx callbacks in queue
  * @writing_state: state of the tx
  * @rd_pending: pending read credits
  * @rd_completed: completed read
@@ -234,6 +235,7 @@ struct mei_cl {
 	u8 timer_count;
 	u8 notify_en;
 	u8 notify_ev;
+	u8 tx_cb_queued;
 	enum mei_file_transaction_states writing_state;
 	struct list_head rd_pending;
 	struct list_head rd_completed;
@@ -241,6 +243,10 @@ struct mei_cl {
 	struct mei_cl_device *cldev;
 };
 
+#define MEI_TX_QUEUE_LIMIT_DEFAULT 50
+#define MEI_TX_QUEUE_LIMIT_MAX 255
+#define MEI_TX_QUEUE_LIMIT_MIN 30
+
 /**
  * struct mei_hw_ops - hw specific ops
  *
@@ -315,8 +321,6 @@ ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length,
 bool mei_cl_bus_rx_event(struct mei_cl *cl);
 bool mei_cl_bus_notify_event(struct mei_cl *cl);
 void mei_cl_bus_remove_devices(struct mei_device *bus);
-bool mei_cl_bus_module_get(struct mei_cl *cl);
-void mei_cl_bus_module_put(struct mei_cl *cl);
 int mei_cl_bus_init(void);
 void mei_cl_bus_exit(void);
 
@@ -361,6 +365,7 @@ const char *mei_pg_state_str(enum mei_pg_state state);
  * @write_waiting_list : write completion list
  * @ctrl_wr_list : pending control write list
  * @ctrl_rd_list : pending control read list
+ * @tx_queue_limit: tx queues per client linit
  *
  * @file_list   : list of opened handles
  * @open_handle_count: number of opened handles
@@ -425,6 +430,7 @@ struct mei_device {
 	struct list_head write_waiting_list;
 	struct list_head ctrl_wr_list;
 	struct list_head ctrl_rd_list;
+	u8 tx_queue_limit;
 
 	struct list_head file_list;
 	long open_handle_count;
diff --git a/drivers/misc/mic/bus/vop_bus.c b/drivers/misc/mic/bus/vop_bus.c
index fd7f2a6049f8..e5bb9c749b5d 100644
--- a/drivers/misc/mic/bus/vop_bus.c
+++ b/drivers/misc/mic/bus/vop_bus.c
@@ -135,7 +135,9 @@ EXPORT_SYMBOL_GPL(vop_unregister_driver);
 
 static void vop_release_dev(struct device *d)
 {
-	put_device(d);
+	struct vop_device *dev = dev_to_vop(d);
+
+	kfree(dev);
 }
 
 struct vop_device *
@@ -174,7 +176,7 @@ vop_register_device(struct device *pdev, int id,
 		goto free_vdev;
 	return vdev;
 free_vdev:
-	kfree(vdev);
+	put_device(&vdev->dev);
 	return ERR_PTR(ret);
 }
 EXPORT_SYMBOL_GPL(vop_register_device);
diff --git a/drivers/misc/ocxl/pci.c b/drivers/misc/ocxl/pci.c
index 0051d9ec76cc..21f425472a82 100644
--- a/drivers/misc/ocxl/pci.c
+++ b/drivers/misc/ocxl/pci.c
@@ -519,7 +519,7 @@ static struct ocxl_fn *init_function(struct pci_dev *dev)
 	rc = device_register(&fn->dev);
 	if (rc) {
 		deconfigure_function(fn);
-		device_unregister(&fn->dev);
+		put_device(&fn->dev);
 		return ERR_PTR(rc);
 	}
 	return fn;