[PATCH 1/3] hwmon: tmp421: handle I2C errors

[PATCH 1/3] hwmon: tmp421: handle I2C errors

[Paul Fertser]

Function i2c_smbus_read_byte_data() can return a negative error number
instead of the data read if I2C transaction failed for whatever reason.

I consider this fix to be stable material as lack of error checking here
leads to serious issues on production hardware. Errors treated as
temperatures produce spurious critical temperature-crossed-threshold
errors in BMC logs for OCP server hardware. The patch was tested with
Mellanox OCP Mezzanine card emulating TMP421 protocol for temperature
sensing which sometimes leads to I2C protocol error during early boot up
stage.

Cc: stable@vger.kernel.org
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
---
 drivers/hwmon/tmp421.c | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index ede66ea6a730..6175ed4b10bd 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -93,7 +93,7 @@ struct tmp421_data {
 	struct hwmon_channel_info temp_info;
 	const struct hwmon_channel_info *info[2];
 	struct hwmon_chip_info chip;
-	char valid;
+	int last_errno;
 	unsigned long last_updated;
 	unsigned long channels;
 	u8 config;
@@ -128,20 +128,30 @@ static struct tmp421_data *tmp421_update_device(struct device *dev)
 	mutex_lock(&data->update_lock);
 
 	if (time_after(jiffies, data->last_updated + (HZ / 2)) ||
-	    !data->valid) {
-		data->config = i2c_smbus_read_byte_data(client,
-			TMP421_CONFIG_REG_1);
+	    data->last_errno) {
+		data->last_errno = i2c_smbus_read_byte_data(client,
+							    TMP421_CONFIG_REG_1);
+		if (data->last_errno < 0)
+			goto exit;
+		data->config =  data->last_errno;
 
 		for (i = 0; i < data->channels; i++) {
-			data->temp[i] = i2c_smbus_read_byte_data(client,
-				TMP421_TEMP_MSB[i]) << 8;
-			data->temp[i] |= i2c_smbus_read_byte_data(client,
-				TMP421_TEMP_LSB[i]);
+			data->last_errno = i2c_smbus_read_byte_data(client,
+								    TMP421_TEMP_MSB[i]);
+			if (data->last_errno < 0)
+				goto exit;
+			data->temp[i] = data->last_errno << 8;
+			data->last_errno = i2c_smbus_read_byte_data(client,
+								    TMP421_TEMP_LSB[i]);
+			if (data->last_errno < 0)
+				goto exit;
+			data->temp[i] |= data->last_errno;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->last_errno = 0;
 	}
 
+exit:
 	mutex_unlock(&data->update_lock);
 
 	return data;
@@ -152,6 +162,9 @@ static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
 {
 	struct tmp421_data *tmp421 = tmp421_update_device(dev);
 
+	if (tmp421->last_errno)
+		return tmp421->last_errno;
+
 	switch (attr) {
 	case hwmon_temp_input:
 		if (tmp421->config & TMP421_CONFIG_RANGE)
-- 
2.17.1

[PATCH 2/3] hwmon: tmp421: report /PVLD condition

[Paul Fertser]

For both local and remote sensors all the supported ICs can report an
"undervoltage lockout" condition which means the conversion wasn't
properly performed due to insufficient power supply voltage and so the
measurement results can't be trusted.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
---
 drivers/hwmon/tmp421.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index 6175ed4b10bd..9ee4c61531f3 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -174,10 +174,10 @@ static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
 		return 0;
 	case hwmon_temp_fault:
 		/*
-		 * The OPEN bit signals a fault. This is bit 0 of the temperature
-		 * register (low byte).
+		 * Any of OPEN or /PVLD bits indicate a hardware mulfunction
+		 * and the conversion result may be incorrect
 		 */
-		*val = tmp421->temp[channel] & 0x01;
+		*val = !!(tmp421->temp[channel] & 0x03);
 		return 0;
 	default:
 		return -EOPNOTSUPP;
@@ -190,9 +190,6 @@ static umode_t tmp421_is_visible(const void *data, enum hwmon_sensor_types type,
 {
 	switch (attr) {
 	case hwmon_temp_fault:
-		if (channel == 0)
-			return 0;
-		return 0444;
 	case hwmon_temp_input:
 		return 0444;
 	default:
-- 
2.17.1

[PATCH 3/3] hwmon: tmp421: fix rounding for negative values

[Paul Fertser]

Current code produces -24999 for 0b1110011100000000 input in standard
format due to always rounding up rather than "away from zero". Use the
common macro for division, unify and simplify the conversion code along
the way.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
---
 drivers/hwmon/tmp421.c | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index 9ee4c61531f3..dec3aced3d8b 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -100,23 +100,17 @@ struct tmp421_data {
 	s16 temp[4];
 };
 
-static int temp_from_s16(s16 reg)
+static int temp_from_raw(u16 reg, bool extended)
 {
 	/* Mask out status bits */
 	int temp = reg & ~0xf;
 
-	return (temp * 1000 + 128) / 256;
-}
-
-static int temp_from_u16(u16 reg)
-{
-	/* Mask out status bits */
-	int temp = reg & ~0xf;
-
-	/* Add offset for extended temperature range. */
-	temp -= 64 * 256;
+	if (extended)
+		temp = temp - 64 * 256;
+	else
+		temp = (s16)temp;
 
-	return (temp * 1000 + 128) / 256;
+	return DIV_ROUND_CLOSEST(temp * 1000, 256);
 }
 
 static struct tmp421_data *tmp421_update_device(struct device *dev)
@@ -167,10 +161,8 @@ static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
 
 	switch (attr) {
 	case hwmon_temp_input:
-		if (tmp421->config & TMP421_CONFIG_RANGE)
-			*val = temp_from_u16(tmp421->temp[channel]);
-		else
-			*val = temp_from_s16(tmp421->temp[channel]);
+		*val = temp_from_raw(tmp421->temp[channel],
+				     tmp421->config & TMP421_CONFIG_RANGE);
 		return 0;
 	case hwmon_temp_fault:
 		/*
-- 
2.17.1

Re: [PATCH 1/3] hwmon: tmp421: handle I2C errors

[Guenter Roeck]

On Wed, Sep 22, 2021 at 04:41:52PM +0300, Paul Fertser wrote:
> Function i2c_smbus_read_byte_data() can return a negative error number
> instead of the data read if I2C transaction failed for whatever reason.
> 
> I consider this fix to be stable material as lack of error checking here
> leads to serious issues on production hardware. Errors treated as
> temperatures produce spurious critical temperature-crossed-threshold
> errors in BMC logs for OCP server hardware. The patch was tested with
> Mellanox OCP Mezzanine card emulating TMP421 protocol for temperature
> sensing which sometimes leads to I2C protocol error during early boot up
> stage.
> 
> Cc: stable@vger.kernel.org
> Signed-off-by: Paul Fertser <fercerpav@gmail.com>
> ---
>  drivers/hwmon/tmp421.c | 31 ++++++++++++++++++++++---------
>  1 file changed, 22 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
> index ede66ea6a730..6175ed4b10bd 100644
> --- a/drivers/hwmon/tmp421.c
> +++ b/drivers/hwmon/tmp421.c
> @@ -93,7 +93,7 @@ struct tmp421_data {
>  	struct hwmon_channel_info temp_info;
>  	const struct hwmon_channel_info *info[2];
>  	struct hwmon_chip_info chip;
> -	char valid;
> +	int last_errno;
>  	unsigned long last_updated;
>  	unsigned long channels;
>  	u8 config;
> @@ -128,20 +128,30 @@ static struct tmp421_data *tmp421_update_device(struct device *dev)
>  	mutex_lock(&data->update_lock);
>  
>  	if (time_after(jiffies, data->last_updated + (HZ / 2)) ||
> -	    !data->valid) {
> -		data->config = i2c_smbus_read_byte_data(client,
> -			TMP421_CONFIG_REG_1);
> +	    data->last_errno) {
> +		data->last_errno = i2c_smbus_read_byte_data(client,
> +							    TMP421_CONFIG_REG_1);

No. The function should return an ERR_PTR after an error.
Something like
	int ret = 0;
	...
	ret = i2c_smbus_read_byte_data(client, TMP421_CONFIG_REG_1);
	if (ret < 0)
		goto exit;
	data->config = ret;
	...
exit:
	mutex_unlock(...);
	return ret < 0 ? ERR_PTR(ret) : data;

Or, even better, let tmp421_update_device() return an error code instead
of data, and let the caller get the data pointer.

int tmp421_update_device(struct tmp421_data *data)
{
	struct i2c_client *client = data->client;
	int ret = 0;

	...
	return ret < 0 ? ret : 0;
}
...

	struct tmp421_data *data = dev_get_drvdata(dev);

	ret = tmp421_update_device(data);
	if (ret)
		return ret;


Guenter

> +		if (data->last_errno < 0)
> +			goto exit;
> +		data->config =  data->last_errno;
>  
>  		for (i = 0; i < data->channels; i++) {
> -			data->temp[i] = i2c_smbus_read_byte_data(client,
> -				TMP421_TEMP_MSB[i]) << 8;
> -			data->temp[i] |= i2c_smbus_read_byte_data(client,
> -				TMP421_TEMP_LSB[i]);
> +			data->last_errno = i2c_smbus_read_byte_data(client,
> +								    TMP421_TEMP_MSB[i]);
> +			if (data->last_errno < 0)
> +				goto exit;
> +			data->temp[i] = data->last_errno << 8;
> +			data->last_errno = i2c_smbus_read_byte_data(client,
> +								    TMP421_TEMP_LSB[i]);
> +			if (data->last_errno < 0)
> +				goto exit;
> +			data->temp[i] |= data->last_errno;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->last_errno = 0;
>  	}
>  
> +exit:
>  	mutex_unlock(&data->update_lock);
>  
>  	return data;
> @@ -152,6 +162,9 @@ static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
>  {
>  	struct tmp421_data *tmp421 = tmp421_update_device(dev);
>  
> +	if (tmp421->last_errno)
> +		return tmp421->last_errno;
> +
>  	switch (attr) {
>  	case hwmon_temp_input:
>  		if (tmp421->config & TMP421_CONFIG_RANGE)
> -- 
> 2.17.1
> 

[PATCH v2 1/3] hwmon: tmp421: handle I2C errors

[Paul Fertser]

Function i2c_smbus_read_byte_data() can return a negative error number
instead of the data read if I2C transaction failed for whatever reason.

I consider this fix to be stable material as lack of error checking here
leads to serious issues on production hardware. Errors treated as
temperatures produce spurious critical temperature-crossed-threshold
errors in BMC logs for OCP server hardware. The patch was tested with
Mellanox OCP Mezzanine card emulating TMP421 protocol for temperature
sensing which sometimes leads to I2C protocol error during early boot up
stage.

Cc: stable@vger.kernel.org
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
---

Changes from v1:
 - Reorganise code following excellent suggestion by Guenter Roeck
   to use tagged errors consistently

 drivers/hwmon/tmp421.c | 45 +++++++++++++++++++++++++++++++-----------
 1 file changed, 33 insertions(+), 12 deletions(-)

diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index ede66ea6a730..63cb6badb478 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -93,7 +93,7 @@ struct tmp421_data {
 	struct hwmon_channel_info temp_info;
 	const struct hwmon_channel_info *info[2];
 	struct hwmon_chip_info chip;
-	char valid;
+	bool valid;
 	unsigned long last_updated;
 	unsigned long channels;
 	u8 config;
@@ -119,38 +119,59 @@ static int temp_from_u16(u16 reg)
 	return (temp * 1000 + 128) / 256;
 }
 
-static struct tmp421_data *tmp421_update_device(struct device *dev)
+static int tmp421_update_device(struct tmp421_data *data)
 {
-	struct tmp421_data *data = dev_get_drvdata(dev);
 	struct i2c_client *client = data->client;
+	int ret = 0;
 	int i;
 
 	mutex_lock(&data->update_lock);
 
 	if (time_after(jiffies, data->last_updated + (HZ / 2)) ||
 	    !data->valid) {
-		data->config = i2c_smbus_read_byte_data(client,
-			TMP421_CONFIG_REG_1);
+		ret = i2c_smbus_read_byte_data(client,
+					       TMP421_CONFIG_REG_1);
+		if (ret < 0)
+			goto exit;
+		data->config = ret;
 
 		for (i = 0; i < data->channels; i++) {
-			data->temp[i] = i2c_smbus_read_byte_data(client,
-				TMP421_TEMP_MSB[i]) << 8;
-			data->temp[i] |= i2c_smbus_read_byte_data(client,
-				TMP421_TEMP_LSB[i]);
+			ret = i2c_smbus_read_byte_data(client,
+						       TMP421_TEMP_MSB[i]);
+			if (ret < 0)
+				goto exit;
+			data->temp[i] = ret << 8;
+
+			ret = i2c_smbus_read_byte_data(client,
+						       TMP421_TEMP_LSB[i]);
+			if (ret < 0)
+				goto exit;
+			data->temp[i] |= ret;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
+exit:
 	mutex_unlock(&data->update_lock);
 
-	return data;
+	if (ret < 0) {
+		data->valid = false;
+		return ret;
+	}
+
+	return 0;
 }
 
 static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
 		       u32 attr, int channel, long *val)
 {
-	struct tmp421_data *tmp421 = tmp421_update_device(dev);
+	struct tmp421_data *tmp421 = dev_get_drvdata(dev);
+	int ret = 0;
+
+	ret = tmp421_update_device(tmp421);
+	if (ret)
+		return ret;
 
 	switch (attr) {
 	case hwmon_temp_input:
-- 
2.17.1

[PATCH v2 2/3] hwmon: tmp421: report /PVLD condition

[Paul Fertser]

For both local and remote sensors all the supported ICs can report an
"undervoltage lockout" condition which means the conversion wasn't
properly performed due to insufficient power supply voltage and so the
measurement results can't be trusted.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
---

Changes from v1:
 - Trivial rebase

 drivers/hwmon/tmp421.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index 63cb6badb478..9f0a4db695db 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -182,10 +182,10 @@ static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
 		return 0;
 	case hwmon_temp_fault:
 		/*
-		 * The OPEN bit signals a fault. This is bit 0 of the temperature
-		 * register (low byte).
+		 * Any of OPEN or /PVLD bits indicate a hardware mulfunction
+		 * and the conversion result may be incorrect
 		 */
-		*val = tmp421->temp[channel] & 0x01;
+		*val = !!(tmp421->temp[channel] & 0x03);
 		return 0;
 	default:
 		return -EOPNOTSUPP;
@@ -198,9 +198,6 @@ static umode_t tmp421_is_visible(const void *data, enum hwmon_sensor_types type,
 {
 	switch (attr) {
 	case hwmon_temp_fault:
-		if (channel == 0)
-			return 0;
-		return 0444;
 	case hwmon_temp_input:
 		return 0444;
 	default:
-- 
2.17.1

[PATCH v2 3/3] hwmon: tmp421: fix rounding for negative values

[Paul Fertser]

Current code produces -24999 for 0b1110011100000000 input in standard
format due to always rounding up rather than "away from zero". Use the
common macro for division, unify and simplify the conversion code along
the way.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
---

Changes from v1:
 - Trivial rebase

 drivers/hwmon/tmp421.c | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index 9f0a4db695db..c77c9f3bbd21 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -100,23 +100,17 @@ struct tmp421_data {
 	s16 temp[4];
 };
 
-static int temp_from_s16(s16 reg)
+static int temp_from_raw(u16 reg, bool extended)
 {
 	/* Mask out status bits */
 	int temp = reg & ~0xf;
 
-	return (temp * 1000 + 128) / 256;
-}
-
-static int temp_from_u16(u16 reg)
-{
-	/* Mask out status bits */
-	int temp = reg & ~0xf;
-
-	/* Add offset for extended temperature range. */
-	temp -= 64 * 256;
+	if (extended)
+		temp = temp - 64 * 256;
+	else
+		temp = (s16)temp;
 
-	return (temp * 1000 + 128) / 256;
+	return DIV_ROUND_CLOSEST(temp * 1000, 256);
 }
 
 static int tmp421_update_device(struct tmp421_data *data)
@@ -175,10 +169,8 @@ static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
 
 	switch (attr) {
 	case hwmon_temp_input:
-		if (tmp421->config & TMP421_CONFIG_RANGE)
-			*val = temp_from_u16(tmp421->temp[channel]);
-		else
-			*val = temp_from_s16(tmp421->temp[channel]);
+		*val = temp_from_raw(tmp421->temp[channel],
+				     tmp421->config & TMP421_CONFIG_RANGE);
 		return 0;
 	case hwmon_temp_fault:
 		/*
-- 
2.17.1

Re: [PATCH v2 3/3] hwmon: tmp421: fix rounding for negative values

[Guenter Roeck]

On Thu, Sep 23, 2021 at 12:48:01PM +0300, Paul Fertser wrote:
> Current code produces -24999 for 0b1110011100000000 input in standard
> format due to always rounding up rather than "away from zero". Use the
> common macro for division, unify and simplify the conversion code along
> the way.
> 
> Signed-off-by: Paul Fertser <fercerpav@gmail.com>

This patch should probably have a Fixes: tag.

Guenter

> ---
> 
> Changes from v1:
>  - Trivial rebase
> 
>  drivers/hwmon/tmp421.c | 24 ++++++++----------------
>  1 file changed, 8 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
> index 9f0a4db695db..c77c9f3bbd21 100644
> --- a/drivers/hwmon/tmp421.c
> +++ b/drivers/hwmon/tmp421.c
> @@ -100,23 +100,17 @@ struct tmp421_data {
>  	s16 temp[4];
>  };
>  
> -static int temp_from_s16(s16 reg)
> +static int temp_from_raw(u16 reg, bool extended)
>  {
>  	/* Mask out status bits */
>  	int temp = reg & ~0xf;
>  
> -	return (temp * 1000 + 128) / 256;
> -}
> -
> -static int temp_from_u16(u16 reg)
> -{
> -	/* Mask out status bits */
> -	int temp = reg & ~0xf;
> -
> -	/* Add offset for extended temperature range. */
> -	temp -= 64 * 256;
> +	if (extended)
> +		temp = temp - 64 * 256;
> +	else
> +		temp = (s16)temp;
>  
> -	return (temp * 1000 + 128) / 256;
> +	return DIV_ROUND_CLOSEST(temp * 1000, 256);
>  }
>  
>  static int tmp421_update_device(struct tmp421_data *data)
> @@ -175,10 +169,8 @@ static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
>  
>  	switch (attr) {
>  	case hwmon_temp_input:
> -		if (tmp421->config & TMP421_CONFIG_RANGE)
> -			*val = temp_from_u16(tmp421->temp[channel]);
> -		else
> -			*val = temp_from_s16(tmp421->temp[channel]);
> +		*val = temp_from_raw(tmp421->temp[channel],
> +				     tmp421->config & TMP421_CONFIG_RANGE);
>  		return 0;
>  	case hwmon_temp_fault:
>  		/*

Re: [PATCH v2 1/3] hwmon: tmp421: handle I2C errors

[Guenter Roeck]

On Thu, Sep 23, 2021 at 12:47:59PM +0300, Paul Fertser wrote:
> Function i2c_smbus_read_byte_data() can return a negative error number
> instead of the data read if I2C transaction failed for whatever reason.
> 
> I consider this fix to be stable material as lack of error checking here
> leads to serious issues on production hardware. Errors treated as
> temperatures produce spurious critical temperature-crossed-threshold
> errors in BMC logs for OCP server hardware. The patch was tested with
> Mellanox OCP Mezzanine card emulating TMP421 protocol for temperature
> sensing which sometimes leads to I2C protocol error during early boot up
> stage.

Possibly, but this doesn't belong into the commit log but after --- as
written. I'd suggest to leave the "I consider this fix to be stable
material" off, rephrase to "Lack of error checking can lead to serious..."
which does belong in the commit description, and add a Fixes: tag which
marks the patch for stable releases. Also, drop the char -> bool change
from the bug fix; it is unrelated and should be a separate cleanup patch.

> 
> Cc: stable@vger.kernel.org
> Signed-off-by: Paul Fertser <fercerpav@gmail.com>
> ---
> 
> Changes from v1:
>  - Reorganise code following excellent suggestion by Guenter Roeck
>    to use tagged errors consistently
> 
>  drivers/hwmon/tmp421.c | 45 +++++++++++++++++++++++++++++++-----------
>  1 file changed, 33 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
> index ede66ea6a730..63cb6badb478 100644
> --- a/drivers/hwmon/tmp421.c
> +++ b/drivers/hwmon/tmp421.c
> @@ -93,7 +93,7 @@ struct tmp421_data {
>  	struct hwmon_channel_info temp_info;
>  	const struct hwmon_channel_info *info[2];
>  	struct hwmon_chip_info chip;
> -	char valid;
> +	bool valid;

This is a cleanup, not a bug fix, and it isn't even mentioned
in the patch description.

>  	unsigned long last_updated;
>  	unsigned long channels;
>  	u8 config;
> @@ -119,38 +119,59 @@ static int temp_from_u16(u16 reg)
>  	return (temp * 1000 + 128) / 256;
>  }
>  
> -static struct tmp421_data *tmp421_update_device(struct device *dev)
> +static int tmp421_update_device(struct tmp421_data *data)
>  {
> -	struct tmp421_data *data = dev_get_drvdata(dev);
>  	struct i2c_client *client = data->client;
> +	int ret = 0;
>  	int i;
>  
>  	mutex_lock(&data->update_lock);
>  
>  	if (time_after(jiffies, data->last_updated + (HZ / 2)) ||
>  	    !data->valid) {
> -		data->config = i2c_smbus_read_byte_data(client,
> -			TMP421_CONFIG_REG_1);
> +		ret = i2c_smbus_read_byte_data(client,
> +					       TMP421_CONFIG_REG_1);
> +		if (ret < 0)
> +			goto exit;
> +		data->config = ret;
>  
>  		for (i = 0; i < data->channels; i++) {
> -			data->temp[i] = i2c_smbus_read_byte_data(client,
> -				TMP421_TEMP_MSB[i]) << 8;
> -			data->temp[i] |= i2c_smbus_read_byte_data(client,
> -				TMP421_TEMP_LSB[i]);
> +			ret = i2c_smbus_read_byte_data(client,
> +						       TMP421_TEMP_MSB[i]);
> +			if (ret < 0)
> +				goto exit;
> +			data->temp[i] = ret << 8;
> +
> +			ret = i2c_smbus_read_byte_data(client,
> +						       TMP421_TEMP_LSB[i]);
> +			if (ret < 0)
> +				goto exit;
> +			data->temp[i] |= ret;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
> +exit:
>  	mutex_unlock(&data->update_lock);
>  
> -	return data;
> +	if (ret < 0) {
> +		data->valid = false;
> +		return ret;
> +	}
> +
> +	return 0;
>  }
>  
>  static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
>  		       u32 attr, int channel, long *val)
>  {
> -	struct tmp421_data *tmp421 = tmp421_update_device(dev);
> +	struct tmp421_data *tmp421 = dev_get_drvdata(dev);
> +	int ret = 0;
> +
> +	ret = tmp421_update_device(tmp421);
> +	if (ret)
> +		return ret;
>  
>  	switch (attr) {
>  	case hwmon_temp_input:

Re: [PATCH v2 1/3] hwmon: tmp421: handle I2C errors

[Paul Fertser]

Hello Guenter,

On Thu, Sep 23, 2021 at 07:20:20PM -0700, Guenter Roeck wrote:
> > --- a/drivers/hwmon/tmp421.c
> > +++ b/drivers/hwmon/tmp421.c
> > @@ -93,7 +93,7 @@ struct tmp421_data {
> >  	struct hwmon_channel_info temp_info;
> >  	const struct hwmon_channel_info *info[2];
> >  	struct hwmon_chip_info chip;
> > -	char valid;
> > +	bool valid;
> 
> This is a cleanup, not a bug fix, and it isn't even mentioned
> in the patch description.

For the bug fix I needed to add a line setting data->valid to false
and was reluctant to assign 0 instead as it would be adding more wrong
(type-wise) code. But since you say that's the way to go, sure, will
do.

Regarding the cleanup, I see hwmon has many examples of "char valid"
and so it might make sense to do them all at once. What would be the
procedure here, is that a desired change at all and if yes, how to
approach doing it? 

-- 
Be free, use free (http://www.gnu.org/philosophy/free-sw.html) software!
mailto:fercerpav@gmail.com

Re: [PATCH v2 1/3] hwmon: tmp421: handle I2C errors

[Guenter Roeck]

On Fri, Sep 24, 2021 at 10:44:50AM +0300, Paul Fertser wrote:
> Hello Guenter,
> 
> On Thu, Sep 23, 2021 at 07:20:20PM -0700, Guenter Roeck wrote:
> > > --- a/drivers/hwmon/tmp421.c
> > > +++ b/drivers/hwmon/tmp421.c
> > > @@ -93,7 +93,7 @@ struct tmp421_data {
> > >  	struct hwmon_channel_info temp_info;
> > >  	const struct hwmon_channel_info *info[2];
> > >  	struct hwmon_chip_info chip;
> > > -	char valid;
> > > +	bool valid;
> > 
> > This is a cleanup, not a bug fix, and it isn't even mentioned
> > in the patch description.
> 
> For the bug fix I needed to add a line setting data->valid to false
> and was reluctant to assign 0 instead as it would be adding more wrong
> (type-wise) code. But since you say that's the way to go, sure, will
> do.

I figured that much, but it is still an unrelated change. I don't object
to making that change, but it should still be a separate patch. FWIW,
I don't mind if it is in a single patch if the code won't be applied
to stable releases, but it should still be mentioned in the description
(eg: while at it, convert 'valid' to boolean).

> 
> Regarding the cleanup, I see hwmon has many examples of "char valid"
> and so it might make sense to do them all at once. What would be the
> procedure here, is that a desired change at all and if yes, how to
> approach doing it? 

You could write a coccinelle script to detect and convert all uses,
then submit a single patch to convert all drivers, with the cocconelle
script as reference in the commit log.

Guenter

[PATCH] hwmon: cleanup non-bool "valid" data fields

[Paul Fertser]

We have bool so use it consistently in all the drivers.

The following Coccinelle script was used:

@@
identifier T;
type t = { char, int };
@@
struct T {
...
-	t valid;
+	bool valid;
...
}

@@
identifier v;
@@
(
- v->valid = 0
+ v->valid = false
|
- v->valid = 1
+ v->valid = true
)

followed by sed to fixup the comments:
sed '/bool valid;/{s/!=0/true/;s/zero/false/}'

Few whitespace changes were fixed manually. All modified drivers were
compile-tested.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
---

This was generated against hwmon-next branch.

 drivers/hwmon/abituguru3.c  |  6 +++---
 drivers/hwmon/ad7414.c      |  4 ++--
 drivers/hwmon/ad7418.c      |  6 +++---
 drivers/hwmon/adm1021.c     |  4 ++--
 drivers/hwmon/adm1025.c     |  4 ++--
 drivers/hwmon/adm1026.c     |  4 ++--
 drivers/hwmon/adm1029.c     |  4 ++--
 drivers/hwmon/adm1031.c     |  6 +++---
 drivers/hwmon/amc6821.c     |  8 ++++----
 drivers/hwmon/applesmc.c    |  2 +-
 drivers/hwmon/asb100.c      |  4 ++--
 drivers/hwmon/asc7621.c     |  4 ++--
 drivers/hwmon/atxp1.c       |  8 ++++----
 drivers/hwmon/coretemp.c    |  2 +-
 drivers/hwmon/dme1737.c     |  4 ++--
 drivers/hwmon/ds1621.c      |  4 ++--
 drivers/hwmon/ds620.c       |  4 ++--
 drivers/hwmon/emc6w201.c    |  4 ++--
 drivers/hwmon/f71805f.c     |  4 ++--
 drivers/hwmon/f71882fg.c    |  4 ++--
 drivers/hwmon/f75375s.c     |  4 ++--
 drivers/hwmon/fschmd.c      |  4 ++--
 drivers/hwmon/g760a.c       |  2 +-
 drivers/hwmon/gl518sm.c     |  4 ++--
 drivers/hwmon/gl520sm.c     |  4 ++--
 drivers/hwmon/ibmaem.c      |  2 +-
 drivers/hwmon/ibmpex.c      |  4 ++--
 drivers/hwmon/it87.c        | 12 ++++++------
 drivers/hwmon/lineage-pem.c |  2 +-
 drivers/hwmon/lm63.c        |  6 +++---
 drivers/hwmon/lm77.c        |  4 ++--
 drivers/hwmon/lm78.c        |  4 ++--
 drivers/hwmon/lm80.c        |  6 +++---
 drivers/hwmon/lm83.c        |  4 ++--
 drivers/hwmon/lm85.c        |  4 ++--
 drivers/hwmon/lm87.c        |  4 ++--
 drivers/hwmon/lm92.c        |  4 ++--
 drivers/hwmon/lm93.c        |  4 ++--
 drivers/hwmon/lm95241.c     |  8 ++++----
 drivers/hwmon/ltc4151.c     |  2 +-
 drivers/hwmon/ltc4215.c     |  2 +-
 drivers/hwmon/ltc4261.c     |  4 ++--
 drivers/hwmon/max16065.c    |  2 +-
 drivers/hwmon/max1619.c     |  4 ++--
 drivers/hwmon/max1668.c     |  4 ++--
 drivers/hwmon/max6639.c     |  4 ++--
 drivers/hwmon/max6642.c     |  2 +-
 drivers/hwmon/pc87360.c     |  4 ++--
 drivers/hwmon/sch5636.c     |  4 ++--
 drivers/hwmon/sht21.c       |  4 ++--
 drivers/hwmon/sis5595.c     |  4 ++--
 drivers/hwmon/smm665.c      |  2 +-
 drivers/hwmon/smsc47b397.c  |  4 ++--
 drivers/hwmon/smsc47m192.c  |  4 ++--
 drivers/hwmon/thmc50.c      |  4 ++--
 drivers/hwmon/tmp401.c      |  6 +++---
 drivers/hwmon/tmp421.c      |  6 +++---
 drivers/hwmon/via686a.c     |  4 ++--
 drivers/hwmon/vt1211.c      |  4 ++--
 drivers/hwmon/vt8231.c      |  4 ++--
 drivers/hwmon/w83627ehf.c   |  8 ++++----
 drivers/hwmon/w83627hf.c    |  6 +++---
 drivers/hwmon/w83781d.c     |  4 ++--
 drivers/hwmon/w83791d.c     |  4 ++--
 drivers/hwmon/w83792d.c     |  6 +++---
 drivers/hwmon/w83793.c      |  6 +++---
 drivers/hwmon/w83795.c      |  6 +++---
 drivers/hwmon/w83l785ts.c   |  4 ++--
 drivers/hwmon/w83l786ng.c   |  4 ++--
 69 files changed, 151 insertions(+), 151 deletions(-)

diff --git a/drivers/hwmon/abituguru3.c b/drivers/hwmon/abituguru3.c
index 112dd0d9377c..8229ad30c909 100644
--- a/drivers/hwmon/abituguru3.c
+++ b/drivers/hwmon/abituguru3.c
@@ -145,7 +145,7 @@ struct abituguru3_data {
 	struct device *hwmon_dev;	/* hwmon registered device */
 	struct mutex update_lock;	/* protect access to data and uGuru */
 	unsigned short addr;		/* uguru base address */
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/*
@@ -1083,7 +1083,7 @@ static struct abituguru3_data *abituguru3_update_device(struct device *dev)
 	mutex_lock(&data->update_lock);
 	if (!data->valid || time_after(jiffies, data->last_updated + HZ)) {
 		/* Clear data->valid while updating */
-		data->valid = 0;
+		data->valid = false;
 		/* Read alarms */
 		if (abituguru3_read_increment_offset(data,
 				ABIT_UGURU3_SETTINGS_BANK,
@@ -1117,7 +1117,7 @@ static struct abituguru3_data *abituguru3_update_device(struct device *dev)
 				goto LEAVE_UPDATE;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 LEAVE_UPDATE:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ad7414.c b/drivers/hwmon/ad7414.c
index 6a765755d061..0afb89c4629d 100644
--- a/drivers/hwmon/ad7414.c
+++ b/drivers/hwmon/ad7414.c
@@ -37,7 +37,7 @@ static u8 AD7414_REG_LIMIT[] = { AD7414_REG_T_HIGH, AD7414_REG_T_LOW };
 struct ad7414_data {
 	struct i2c_client	*client;
 	struct mutex		lock;	/* atomic read data updates */
-	char			valid;	/* !=0 if following fields are valid */
+	bool			valid;	/* true if following fields are valid */
 	unsigned long		next_update;	/* In jiffies */
 	s16			temp_input;	/* Register values */
 	s8			temps[ARRAY_SIZE(AD7414_REG_LIMIT)];
@@ -95,7 +95,7 @@ static struct ad7414_data *ad7414_update_device(struct device *dev)
 		}
 
 		data->next_update = jiffies + HZ + HZ / 2;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->lock);
diff --git a/drivers/hwmon/ad7418.c b/drivers/hwmon/ad7418.c
index d618f6b2f382..22bdb7e5b9e0 100644
--- a/drivers/hwmon/ad7418.c
+++ b/drivers/hwmon/ad7418.c
@@ -46,7 +46,7 @@ struct ad7418_data {
 	enum chips		type;
 	struct mutex		lock;
 	int			adc_max;	/* number of ADC channels */
-	char			valid;
+	bool			valid;
 	unsigned long		last_updated;	/* In jiffies */
 	s16			temp[3];	/* Register values */
 	u16			in[4];
@@ -111,14 +111,14 @@ static int ad7418_update_device(struct device *dev)
 			goto abort;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->lock);
 	return 0;
 
 abort:
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->lock);
 	return val;
 }
diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
index 71deb2cd20f5..38b447c6e8cd 100644
--- a/drivers/hwmon/adm1021.c
+++ b/drivers/hwmon/adm1021.c
@@ -72,7 +72,7 @@ struct adm1021_data {
 	const struct attribute_group *groups[3];
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	char low_power;		/* !=0 if device in low power mode */
 	unsigned long last_updated;	/* In jiffies */
 
@@ -135,7 +135,7 @@ static struct adm1021_data *adm1021_update_device(struct device *dev)
 						ADM1023_REG_REM_OFFSET_PREC);
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/adm1025.c b/drivers/hwmon/adm1025.c
index de51e01c061b..4352f6a884e8 100644
--- a/drivers/hwmon/adm1025.c
+++ b/drivers/hwmon/adm1025.c
@@ -97,7 +97,7 @@ struct adm1025_data {
 	struct i2c_client *client;
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	u8 in[6];		/* register value */
@@ -148,7 +148,7 @@ static struct adm1025_data *adm1025_update_device(struct device *dev)
 			      ADM1025_REG_VID4) & 0x01) << 4);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/adm1026.c b/drivers/hwmon/adm1026.c
index 49cefbadb156..69b3ec752944 100644
--- a/drivers/hwmon/adm1026.c
+++ b/drivers/hwmon/adm1026.c
@@ -259,7 +259,7 @@ struct adm1026_data {
 	const struct attribute_group *groups[3];
 
 	struct mutex update_lock;
-	int valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_reading;	/* In jiffies */
 	unsigned long last_config;	/* In jiffies */
 
@@ -459,7 +459,7 @@ static struct adm1026_data *adm1026_update_device(struct device *dev)
 		data->last_config = jiffies;
 	}	/* last_config */
 
-	data->valid = 1;
+	data->valid = true;
 	mutex_unlock(&data->update_lock);
 	return data;
 }
diff --git a/drivers/hwmon/adm1029.c b/drivers/hwmon/adm1029.c
index 50b1df7b008c..3e1999413f32 100644
--- a/drivers/hwmon/adm1029.c
+++ b/drivers/hwmon/adm1029.c
@@ -99,7 +99,7 @@ static const u8 ADM1029_REG_FAN_DIV[] = {
 struct adm1029_data {
 	struct i2c_client *client;
 	struct mutex update_lock; /* protect register access */
-	char valid;		/* zero until following fields are valid */
+	bool valid;		/* false until following fields are valid */
 	unsigned long last_updated;	/* in jiffies */
 
 	/* registers values, signed for temperature, unsigned for other stuff */
@@ -143,7 +143,7 @@ static struct adm1029_data *adm1029_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/adm1031.c b/drivers/hwmon/adm1031.c
index b538ace2d292..257ec53ae723 100644
--- a/drivers/hwmon/adm1031.c
+++ b/drivers/hwmon/adm1031.c
@@ -65,7 +65,7 @@ struct adm1031_data {
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
 	int chip_type;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	unsigned int update_interval;	/* In milliseconds */
 	/*
@@ -187,7 +187,7 @@ static struct adm1031_data *adm1031_update_device(struct device *dev)
 					ADM1031_REG_PWM) >> (4 * chan)) & 0x0f;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
@@ -650,7 +650,7 @@ static ssize_t fan_div_store(struct device *dev,
 			    data->fan_min[nr]);
 
 	/* Invalidate the cache: fan speed is no longer valid */
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 	return count;
 }
diff --git a/drivers/hwmon/amc6821.c b/drivers/hwmon/amc6821.c
index 6b1ce2242c61..0c16face3fd3 100644
--- a/drivers/hwmon/amc6821.c
+++ b/drivers/hwmon/amc6821.c
@@ -141,7 +141,7 @@ static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI,
 struct amc6821_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* register values */
@@ -258,7 +258,7 @@ static struct amc6821_data *amc6821_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 	mutex_unlock(&data->update_lock);
 	return data;
@@ -511,7 +511,7 @@ static ssize_t temp_auto_point_temp_store(struct device *dev,
 	}
 
 	mutex_lock(&data->update_lock);
-	data->valid = 0;
+	data->valid = false;
 
 	switch (ix) {
 	case 0:
@@ -584,7 +584,7 @@ static ssize_t pwm1_auto_point_pwm_store(struct device *dev,
 	}
 
 EXIT:
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 	return count;
 }
diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
index c31759794a29..fc6d6a9053ce 100644
--- a/drivers/hwmon/applesmc.c
+++ b/drivers/hwmon/applesmc.c
@@ -391,7 +391,7 @@ static const struct applesmc_entry *applesmc_get_entry_by_index(int index)
 	cache->len = info[0];
 	memcpy(cache->type, &info[1], 4);
 	cache->flags = info[5];
-	cache->valid = 1;
+	cache->valid = true;
 
 out:
 	mutex_unlock(&smcreg.mutex);
diff --git a/drivers/hwmon/asb100.c b/drivers/hwmon/asb100.c
index ba9fcf6f9264..8cf0bcb85eb4 100644
--- a/drivers/hwmon/asb100.c
+++ b/drivers/hwmon/asb100.c
@@ -186,7 +186,7 @@ struct asb100_data {
 	/* array of 2 pointers to subclients */
 	struct i2c_client *lm75[2];
 
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	u8 in[7];		/* Register value */
 	u8 in_max[7];		/* Register value */
 	u8 in_min[7];		/* Register value */
@@ -993,7 +993,7 @@ static struct asb100_data *asb100_update_device(struct device *dev)
 			(asb100_read_value(client, ASB100_REG_ALARM2) << 8);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 
 		dev_dbg(&client->dev, "... device update complete\n");
 	}
diff --git a/drivers/hwmon/asc7621.c b/drivers/hwmon/asc7621.c
index 600ffc7e1900..e835605a7456 100644
--- a/drivers/hwmon/asc7621.c
+++ b/drivers/hwmon/asc7621.c
@@ -77,7 +77,7 @@ struct asc7621_data {
 	struct i2c_client client;
 	struct device *class_dev;
 	struct mutex update_lock;
-	int valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_high_reading;	/* In jiffies */
 	unsigned long last_low_reading;		/* In jiffies */
 	/*
@@ -1032,7 +1032,7 @@ static struct asc7621_data *asc7621_update_device(struct device *dev)
 		data->last_low_reading = jiffies;
 	}			/* last_reading */
 
-	data->valid = 1;
+	data->valid = true;
 
 	mutex_unlock(&data->update_lock);
 
diff --git a/drivers/hwmon/atxp1.c b/drivers/hwmon/atxp1.c
index 1e08a5431f12..24e7da68c064 100644
--- a/drivers/hwmon/atxp1.c
+++ b/drivers/hwmon/atxp1.c
@@ -63,7 +63,7 @@ static struct atxp1_data *atxp1_update_device(struct device *dev)
 		data->reg.gpio1 = i2c_smbus_read_byte_data(client, ATXP1_GPIO1);
 		data->reg.gpio2 = i2c_smbus_read_byte_data(client, ATXP1_GPIO2);
 
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
@@ -136,7 +136,7 @@ static ssize_t cpu0_vid_store(struct device *dev,
 						ATXP1_VID, cvid | ATXP1_VIDENA);
 	}
 
-	data->valid = 0;
+	data->valid = false;
 
 	return count;
 }
@@ -180,7 +180,7 @@ static ssize_t gpio1_store(struct device *dev, struct device_attribute *attr,
 
 		i2c_smbus_write_byte_data(client, ATXP1_GPIO1, value);
 
-		data->valid = 0;
+		data->valid = false;
 	}
 
 	return count;
@@ -224,7 +224,7 @@ static ssize_t gpio2_store(struct device *dev, struct device_attribute *attr,
 
 		i2c_smbus_write_byte_data(client, ATXP1_GPIO2, value);
 
-		data->valid = 0;
+		data->valid = false;
 	}
 
 	return count;
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index bb9211215a68..ccf0af5b988a 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -167,7 +167,7 @@ static ssize_t show_temp(struct device *dev,
 		 * really help at all.
 		 */
 		tdata->temp = tdata->tjmax - ((eax >> 16) & 0x7f) * 1000;
-		tdata->valid = 1;
+		tdata->valid = true;
 		tdata->last_updated = jiffies;
 	}
 
diff --git a/drivers/hwmon/dme1737.c b/drivers/hwmon/dme1737.c
index c1e4cfb40c3d..e3ad4c2d0038 100644
--- a/drivers/hwmon/dme1737.c
+++ b/drivers/hwmon/dme1737.c
@@ -203,7 +203,7 @@ struct dme1737_data {
 	unsigned int addr;		/* for ISA devices only */
 
 	struct mutex update_lock;
-	int valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_update;	/* in jiffies */
 	unsigned long last_vbat;	/* in jiffies */
 	enum chips type;
@@ -778,7 +778,7 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
 		}
 
 		data->last_update = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
index bf1c4b7ecb40..0886abf6ebab 100644
--- a/drivers/hwmon/ds1621.c
+++ b/drivers/hwmon/ds1621.c
@@ -109,7 +109,7 @@ static const u8 DS1621_REG_TEMP[3] = {
 struct ds1621_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	enum chips kind;		/* device type */
 
@@ -213,7 +213,7 @@ static struct ds1621_data *ds1621_update_client(struct device *dev)
 						  new_conf);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ds620.c b/drivers/hwmon/ds620.c
index 9ec722798c4a..82d7c3d58f49 100644
--- a/drivers/hwmon/ds620.c
+++ b/drivers/hwmon/ds620.c
@@ -56,7 +56,7 @@ static const u8 DS620_REG_TEMP[3] = {
 struct ds620_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	s16 temp[3];		/* Register values, word */
@@ -118,7 +118,7 @@ static struct ds620_data *ds620_update_client(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/emc6w201.c b/drivers/hwmon/emc6w201.c
index ec5c98702bf5..29082c8463f4 100644
--- a/drivers/hwmon/emc6w201.c
+++ b/drivers/hwmon/emc6w201.c
@@ -45,7 +45,7 @@ enum subfeature { input, min, max };
 struct emc6w201_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* registers values */
@@ -162,7 +162,7 @@ static struct emc6w201_data *emc6w201_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/f71805f.c b/drivers/hwmon/f71805f.c
index 67b47de8263a..7f20edb0677c 100644
--- a/drivers/hwmon/f71805f.c
+++ b/drivers/hwmon/f71805f.c
@@ -165,7 +165,7 @@ struct f71805f_data {
 	struct device *hwmon_dev;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	unsigned long last_limits;	/* In jiffies */
 
@@ -404,7 +404,7 @@ static struct f71805f_data *f71805f_update_device(struct device *dev)
 			+ (f71805f_read8(data, F71805F_REG_STATUS(2)) << 16);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c
index 4dec793fd07d..4673d403759a 100644
--- a/drivers/hwmon/f71882fg.c
+++ b/drivers/hwmon/f71882fg.c
@@ -253,7 +253,7 @@ struct f71882fg_data {
 
 	struct mutex update_lock;
 	int temp_start;			/* temp numbering start (0 or 1) */
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	char auto_point_temp_signed;
 	unsigned long last_updated;	/* In jiffies */
 	unsigned long last_limits;	/* In jiffies */
@@ -1359,7 +1359,7 @@ static struct f71882fg_data *f71882fg_update_device(struct device *dev)
 							F71882FG_REG_IN(nr));
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
index 3e567be60fb1..57c8a473698d 100644
--- a/drivers/hwmon/f75375s.c
+++ b/drivers/hwmon/f75375s.c
@@ -85,7 +85,7 @@ struct f75375_data {
 	const char *name;
 	int kind;
 	struct mutex update_lock; /* protect register access */
-	char valid;
+	bool valid;
 	unsigned long last_updated;	/* In jiffies */
 	unsigned long last_limits;	/* In jiffies */
 
@@ -228,7 +228,7 @@ static struct f75375_data *f75375_update_device(struct device *dev)
 				f75375_read8(client, F75375_REG_VOLT(nr));
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/fschmd.c b/drivers/hwmon/fschmd.c
index 5191cd85a8d1..c26195e3aad7 100644
--- a/drivers/hwmon/fschmd.c
+++ b/drivers/hwmon/fschmd.c
@@ -264,7 +264,7 @@ struct fschmd_data {
 	unsigned long watchdog_is_open;
 	char watchdog_expect_close;
 	char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* register values */
@@ -1356,7 +1356,7 @@ static struct fschmd_data *fschmd_update_device(struct device *dev)
 					       FSCHMD_REG_VOLT[data->kind][i]);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/g760a.c b/drivers/hwmon/g760a.c
index a692f7b2f6f7..36717b524dbd 100644
--- a/drivers/hwmon/g760a.c
+++ b/drivers/hwmon/g760a.c
@@ -95,7 +95,7 @@ static struct g760a_data *g760a_update_client(struct device *dev)
 		data->fan_sta = g760a_read_value(client, G760A_REG_FAN_STA);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/gl518sm.c b/drivers/hwmon/gl518sm.c
index 7aaee5a48243..dd683b0a648f 100644
--- a/drivers/hwmon/gl518sm.c
+++ b/drivers/hwmon/gl518sm.c
@@ -107,7 +107,7 @@ struct gl518_data {
 	enum chips type;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 voltage_in[4];	/* Register values; [0] = VDD */
@@ -211,7 +211,7 @@ static struct gl518_data *gl518_update_device(struct device *dev)
 		    gl518_read_value(client, GL518_REG_VIN3);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/gl520sm.c b/drivers/hwmon/gl520sm.c
index 4ae1295cc3ea..096ba9797211 100644
--- a/drivers/hwmon/gl520sm.c
+++ b/drivers/hwmon/gl520sm.c
@@ -64,7 +64,7 @@ struct gl520_data {
 	struct i2c_client *client;
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
-	char valid;		/* zero until the following fields are valid */
+	bool valid;		/* false until the following fields are valid */
 	unsigned long last_updated;	/* in jiffies */
 
 	u8 vid;
@@ -174,7 +174,7 @@ static struct gl520_data *gl520_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c
index a4ec85207782..de6baf6ca3d1 100644
--- a/drivers/hwmon/ibmaem.c
+++ b/drivers/hwmon/ibmaem.c
@@ -127,7 +127,7 @@ struct aem_data {
 	struct device		*hwmon_dev;
 	struct platform_device	*pdev;
 	struct mutex		lock;
-	char			valid;
+	bool			valid;
 	unsigned long		last_updated;	/* In jiffies */
 	u8			ver_major;
 	u8			ver_minor;
diff --git a/drivers/hwmon/ibmpex.c b/drivers/hwmon/ibmpex.c
index b2ab83c9fd9a..f6ec165c0fa8 100644
--- a/drivers/hwmon/ibmpex.c
+++ b/drivers/hwmon/ibmpex.c
@@ -66,7 +66,7 @@ struct ibmpex_bmc_data {
 	struct device		*hwmon_dev;
 	struct device		*bmc_device;
 	struct mutex		lock;
-	char			valid;
+	bool			valid;
 	unsigned long		last_updated;	/* In jiffies */
 
 	struct ipmi_addr	address;
@@ -239,7 +239,7 @@ static void ibmpex_update_device(struct ibmpex_bmc_data *data)
 	}
 
 	data->last_updated = jiffies;
-	data->valid = 1;
+	data->valid = true;
 
 out:
 	mutex_unlock(&data->lock);
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 1f93134afcb9..0e543dbe0a6b 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -519,7 +519,7 @@ struct it87_data {
 	unsigned short addr;
 	const char *name;
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u16 in_scaled;		/* Internal voltage sensors are scaled */
@@ -844,7 +844,7 @@ static struct it87_data *it87_update_device(struct device *dev)
 			data->vid &= 0x3f;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
@@ -980,7 +980,7 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
 			regval |= 0x80;
 			it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
 		}
-		data->valid = 0;
+		data->valid = false;
 		reg = IT87_REG_TEMP_OFFSET[nr];
 		break;
 	}
@@ -1079,7 +1079,7 @@ static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
 	it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
 	if (has_temp_old_peci(data, nr))
 		it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
-	data->valid = 0;	/* Force cache refresh */
+	data->valid = false;	/* Force cache refresh */
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -1834,7 +1834,7 @@ static ssize_t clear_intrusion(struct device *dev,
 		config |= BIT(5);
 		it87_write_value(data, IT87_REG_CONFIG, config);
 		/* Invalidate cache to force re-read */
-		data->valid = 0;
+		data->valid = false;
 	}
 	mutex_unlock(&data->update_lock);
 
@@ -3229,7 +3229,7 @@ static int __maybe_unused it87_resume(struct device *dev)
 	it87_start_monitoring(data);
 
 	/* force update */
-	data->valid = 0;
+	data->valid = false;
 
 	mutex_unlock(&data->update_lock);
 
diff --git a/drivers/hwmon/lineage-pem.c b/drivers/hwmon/lineage-pem.c
index 1109fffa76fb..ef5a49cd9149 100644
--- a/drivers/hwmon/lineage-pem.c
+++ b/drivers/hwmon/lineage-pem.c
@@ -191,7 +191,7 @@ static struct pem_data *pem_update_device(struct device *dev)
 		i2c_smbus_write_byte(client, PEM_CLEAR_INFO_FLAGS);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c
index c8f93c5d1ccc..339a145afc09 100644
--- a/drivers/hwmon/lm63.c
+++ b/drivers/hwmon/lm63.c
@@ -139,7 +139,7 @@ struct lm63_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
 	const struct attribute_group *groups[5];
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	char lut_valid; /* zero until lut fields are valid */
 	unsigned long last_updated; /* in jiffies */
 	unsigned long lut_last_updated; /* in jiffies */
@@ -289,7 +289,7 @@ static struct lm63_data *lm63_update_device(struct device *dev)
 			       LM63_REG_ALERT_STATUS) & 0x7F;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	lm63_update_lut(data);
@@ -714,7 +714,7 @@ static ssize_t temp2_type_store(struct device *dev,
 	reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
 	i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
 				  reg | (data->trutherm ? 0x02 : 0x00));
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 
 	return count;
diff --git a/drivers/hwmon/lm77.c b/drivers/hwmon/lm77.c
index 7570c9d50ddc..df6af85e170a 100644
--- a/drivers/hwmon/lm77.c
+++ b/drivers/hwmon/lm77.c
@@ -55,7 +55,7 @@ static const u8 temp_regs[t_num_temp] = {
 struct lm77_data {
 	struct i2c_client	*client;
 	struct mutex		update_lock;
-	char			valid;
+	bool			valid;
 	unsigned long		last_updated;	/* In jiffies */
 	int			temp[t_num_temp]; /* index using temp_index */
 	u8			alarms;
@@ -118,7 +118,7 @@ static struct lm77_data *lm77_update_device(struct device *dev)
 		data->alarms =
 			lm77_read_value(client, LM77_REG_TEMP) & 0x0007;
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm78.c b/drivers/hwmon/lm78.c
index 1aa35ca0c6fe..5e129cbec1cb 100644
--- a/drivers/hwmon/lm78.c
+++ b/drivers/hwmon/lm78.c
@@ -117,7 +117,7 @@ struct lm78_data {
 	int isa_addr;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[7];		/* Register value */
@@ -772,7 +772,7 @@ static struct lm78_data *lm78_update_device(struct device *dev)
 		data->alarms = lm78_read_value(data, LM78_REG_ALARM1) +
 		    (lm78_read_value(data, LM78_REG_ALARM2) << 8);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 
 		data->fan_div[2] = 1;
 	}
diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
index 97ab491d2922..e85e062bbf32 100644
--- a/drivers/hwmon/lm80.c
+++ b/drivers/hwmon/lm80.c
@@ -117,7 +117,7 @@ struct lm80_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
 	char error;		/* !=0 if error occurred during last update */
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[i_num_in][7];	/* Register value, 1st index is enum in_index */
@@ -236,14 +236,14 @@ static struct lm80_data *lm80_update_device(struct device *dev)
 		data->alarms = prev_rv + (rv << 8);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 		data->error = 0;
 	}
 	goto done;
 
 abort:
 	ret = ERR_PTR(rv);
-	data->valid = 0;
+	data->valid = false;
 	data->error = 1;
 
 done:
diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c
index 2ff5ecce608e..74fd7aa373a3 100644
--- a/drivers/hwmon/lm83.c
+++ b/drivers/hwmon/lm83.c
@@ -105,7 +105,7 @@ struct lm83_data {
 	struct i2c_client *client;
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* registers values */
@@ -137,7 +137,7 @@ static struct lm83_data *lm83_update_device(struct device *dev)
 		    << 8);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm85.c b/drivers/hwmon/lm85.c
index c7bf5de7b70f..88cf2012d34b 100644
--- a/drivers/hwmon/lm85.c
+++ b/drivers/hwmon/lm85.c
@@ -294,7 +294,7 @@ struct lm85_data {
 	bool has_vid5;	/* true if VID5 is configured for ADT7463 or ADT7468 */
 
 	struct mutex update_lock;
-	int valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_reading;	/* In jiffies */
 	unsigned long last_config;	/* In jiffies */
 
@@ -541,7 +541,7 @@ static struct lm85_data *lm85_update_device(struct device *dev)
 		data->last_config = jiffies;
 	}  /* last_config */
 
-	data->valid = 1;
+	data->valid = true;
 
 	mutex_unlock(&data->update_lock);
 
diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c
index b2d820125bb6..1750bc588856 100644
--- a/drivers/hwmon/lm87.c
+++ b/drivers/hwmon/lm87.c
@@ -141,7 +141,7 @@ static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
 
 struct lm87_data {
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* In jiffies */
 
 	u8 channel;		/* register value */
@@ -251,7 +251,7 @@ static struct lm87_data *lm87_update_device(struct device *dev)
 		data->aout = lm87_read_value(client, LM87_REG_AOUT);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm92.c b/drivers/hwmon/lm92.c
index 9bf278cf0bd0..5bae6eedcaf1 100644
--- a/drivers/hwmon/lm92.c
+++ b/drivers/hwmon/lm92.c
@@ -99,7 +99,7 @@ static const u8 regs[t_num_regs] = {
 struct lm92_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* registers values */
@@ -126,7 +126,7 @@ static struct lm92_data *lm92_update_device(struct device *dev)
 				i2c_smbus_read_word_swapped(client, regs[i]);
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm93.c b/drivers/hwmon/lm93.c
index 78d6dfaf145b..dc67bf954b21 100644
--- a/drivers/hwmon/lm93.c
+++ b/drivers/hwmon/lm93.c
@@ -202,7 +202,7 @@ struct lm93_data {
 	/* client update function */
 	void (*update)(struct lm93_data *, struct i2c_client *);
 
-	char valid; /* !=0 if following fields are valid */
+	bool valid; /* true if following fields are valid */
 
 	/* register values, arranged by block read groups */
 	struct block1_t block1;
@@ -917,7 +917,7 @@ static struct lm93_data *lm93_update_device(struct device *dev)
 
 		data->update(data, client);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/lm95241.c b/drivers/hwmon/lm95241.c
index 00dbc170c8c6..8ea46ff20be5 100644
--- a/drivers/hwmon/lm95241.c
+++ b/drivers/hwmon/lm95241.c
@@ -78,7 +78,7 @@ struct lm95241_data {
 	struct mutex update_lock;
 	unsigned long last_updated;	/* in jiffies */
 	unsigned long interval;		/* in milli-seconds */
-	char valid;		/* zero until following fields are valid */
+	bool valid;		/* false until following fields are valid */
 	/* registers values */
 	u8 temp[ARRAY_SIZE(lm95241_reg_address)];
 	u8 status, config, model, trutherm;
@@ -118,7 +118,7 @@ static struct lm95241_data *lm95241_update_device(struct device *dev)
 		data->status = i2c_smbus_read_byte_data(client,
 							LM95241_REG_R_STATUS);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
@@ -257,7 +257,7 @@ static int lm95241_write_temp(struct device *dev, u32 attr, int channel,
 			else
 				data->config &= ~R2DF_MASK;
 		}
-		data->valid = 0;
+		data->valid = false;
 		ret = i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG,
 						data->config);
 		break;
@@ -273,7 +273,7 @@ static int lm95241_write_temp(struct device *dev, u32 attr, int channel,
 			else
 				data->config &= ~R2DF_MASK;
 		}
-		data->valid = 0;
+		data->valid = false;
 		ret = i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG,
 						data->config);
 		break;
diff --git a/drivers/hwmon/ltc4151.c b/drivers/hwmon/ltc4151.c
index 13b85367a21f..e3ac004c1ed1 100644
--- a/drivers/hwmon/ltc4151.c
+++ b/drivers/hwmon/ltc4151.c
@@ -77,7 +77,7 @@ static struct ltc4151_data *ltc4151_update_device(struct device *dev)
 			data->regs[i] = val;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ltc4215.c b/drivers/hwmon/ltc4215.c
index 1d18c212054f..fa43d26ddd4f 100644
--- a/drivers/hwmon/ltc4215.c
+++ b/drivers/hwmon/ltc4215.c
@@ -64,7 +64,7 @@ static struct ltc4215_data *ltc4215_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/ltc4261.c b/drivers/hwmon/ltc4261.c
index b81e9c3d297b..b91cc4fe84e5 100644
--- a/drivers/hwmon/ltc4261.c
+++ b/drivers/hwmon/ltc4261.c
@@ -73,13 +73,13 @@ static struct ltc4261_data *ltc4261_update_device(struct device *dev)
 					"Failed to read ADC value: error %d\n",
 					val);
 				ret = ERR_PTR(val);
-				data->valid = 0;
+				data->valid = false;
 				goto abort;
 			}
 			data->regs[i] = val;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/max16065.c b/drivers/hwmon/max16065.c
index ae3a6a7bdaa2..daa5d8af1e69 100644
--- a/drivers/hwmon/max16065.c
+++ b/drivers/hwmon/max16065.c
@@ -166,7 +166,7 @@ static struct max16065_data *max16065_update_device(struct device *dev)
 			  = i2c_smbus_read_byte_data(client, MAX16065_FAULT(i));
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 	mutex_unlock(&data->update_lock);
 	return data;
diff --git a/drivers/hwmon/max1619.c b/drivers/hwmon/max1619.c
index 8bd941cae4d1..eae9e68027bc 100644
--- a/drivers/hwmon/max1619.c
+++ b/drivers/hwmon/max1619.c
@@ -79,7 +79,7 @@ enum temp_index {
 struct max1619_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* registers values */
@@ -124,7 +124,7 @@ static struct max1619_data *max1619_update_device(struct device *dev)
 			data->alarms ^= 0x02;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/max1668.c b/drivers/hwmon/max1668.c
index 5c41c78f0458..78688e6cb87d 100644
--- a/drivers/hwmon/max1668.c
+++ b/drivers/hwmon/max1668.c
@@ -58,7 +58,7 @@ struct max1668_data {
 	enum chips type;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* 1x local and 4x remote */
@@ -120,7 +120,7 @@ static struct max1668_data *max1668_update_device(struct device *dev)
 	data->alarms |= val;
 
 	data->last_updated = jiffies;
-	data->valid = 1;
+	data->valid = true;
 abort:
 	mutex_unlock(&data->update_lock);
 
diff --git a/drivers/hwmon/max6639.c b/drivers/hwmon/max6639.c
index b71899c641fa..ccc0f047bd44 100644
--- a/drivers/hwmon/max6639.c
+++ b/drivers/hwmon/max6639.c
@@ -69,7 +69,7 @@ static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 };
 struct max6639_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* Register values sampled regularly */
@@ -141,7 +141,7 @@ static struct max6639_data *max6639_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/max6642.c b/drivers/hwmon/max6642.c
index 23d93142b0b3..699d265aae2e 100644
--- a/drivers/hwmon/max6642.c
+++ b/drivers/hwmon/max6642.c
@@ -181,7 +181,7 @@ static struct max6642_data *max6642_update_device(struct device *dev)
 					MAX6642_REG_R_STATUS);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/pc87360.c b/drivers/hwmon/pc87360.c
index 6a9ba23cd302..0828436a1f6c 100644
--- a/drivers/hwmon/pc87360.c
+++ b/drivers/hwmon/pc87360.c
@@ -178,7 +178,7 @@ struct pc87360_data {
 	struct device *hwmon_dev;
 	struct mutex lock;
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	int address[3];
@@ -1673,7 +1673,7 @@ static struct pc87360_data *pc87360_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/sch5636.c b/drivers/hwmon/sch5636.c
index a5cd4de36575..39ff1c9b1df5 100644
--- a/drivers/hwmon/sch5636.c
+++ b/drivers/hwmon/sch5636.c
@@ -56,7 +56,7 @@ struct sch5636_data {
 	struct device *hwmon_dev;
 
 	struct mutex update_lock;
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	u8 in[SCH5636_NO_INS];
 	u8 temp_val[SCH5636_NO_TEMPS];
@@ -140,7 +140,7 @@ static struct sch5636_data *sch5636_update_device(struct device *dev)
 	}
 
 	data->last_updated = jiffies;
-	data->valid = 1;
+	data->valid = true;
 abort:
 	mutex_unlock(&data->update_lock);
 	return ret;
diff --git a/drivers/hwmon/sht21.c b/drivers/hwmon/sht21.c
index 7d18ce5d3839..e23dbf287233 100644
--- a/drivers/hwmon/sht21.c
+++ b/drivers/hwmon/sht21.c
@@ -41,7 +41,7 @@ struct sht21 {
 	unsigned long last_update;
 	int temperature;
 	int humidity;
-	char valid;
+	bool valid;
 	char eic[18];
 };
 
@@ -105,7 +105,7 @@ static int sht21_update_measurements(struct device *dev)
 			goto out;
 		sht21->humidity = sht21_rh_ticks_to_per_cent_mille(ret);
 		sht21->last_update = jiffies;
-		sht21->valid = 1;
+		sht21->valid = true;
 	}
 out:
 	mutex_unlock(&sht21->lock);
diff --git a/drivers/hwmon/sis5595.c b/drivers/hwmon/sis5595.c
index 0c6741f949f5..018cb5a7651f 100644
--- a/drivers/hwmon/sis5595.c
+++ b/drivers/hwmon/sis5595.c
@@ -172,7 +172,7 @@ struct sis5595_data {
 	struct mutex lock;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	char maxins;		/* == 3 if temp enabled, otherwise == 4 */
 	u8 revision;		/* Reg. value */
@@ -728,7 +728,7 @@ static struct sis5595_data *sis5595_update_device(struct device *dev)
 		    sis5595_read_value(data, SIS5595_REG_ALARM1) |
 		    (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/smm665.c b/drivers/hwmon/smm665.c
index 62906d9c4b86..8c4ed72e5d68 100644
--- a/drivers/hwmon/smm665.c
+++ b/drivers/hwmon/smm665.c
@@ -265,7 +265,7 @@ static struct smm665_data *smm665_update_device(struct device *dev)
 			data->adc[i] = val;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/smsc47b397.c b/drivers/hwmon/smsc47b397.c
index f928b8d4ff48..c26d6eae0e4e 100644
--- a/drivers/hwmon/smsc47b397.c
+++ b/drivers/hwmon/smsc47b397.c
@@ -96,7 +96,7 @@ struct smsc47b397_data {
 
 	struct mutex update_lock;
 	unsigned long last_updated; /* in jiffies */
-	int valid;
+	bool valid;
 
 	/* register values */
 	u16 fan[4];
@@ -137,7 +137,7 @@ static struct smsc47b397_data *smsc47b397_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 
 		dev_dbg(dev, "... device update complete\n");
 	}
diff --git a/drivers/hwmon/smsc47m192.c b/drivers/hwmon/smsc47m192.c
index 03a87aa2017a..a5db15c087ae 100644
--- a/drivers/hwmon/smsc47m192.c
+++ b/drivers/hwmon/smsc47m192.c
@@ -86,7 +86,7 @@ struct smsc47m192_data {
 	struct i2c_client *client;
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[8];		/* Register value */
@@ -157,7 +157,7 @@ static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
 						SMSC47M192_REG_ALARM2) << 8);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/thmc50.c b/drivers/hwmon/thmc50.c
index fde5e2d0825a..6a804f5036f4 100644
--- a/drivers/hwmon/thmc50.c
+++ b/drivers/hwmon/thmc50.c
@@ -62,7 +62,7 @@ struct thmc50_data {
 	enum chips type;
 	unsigned long last_updated;	/* In jiffies */
 	char has_temp3;		/* !=0 if it is ADM1022 in temp3 mode */
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 
 	/* Register values */
 	s8 temp_input[3];
@@ -107,7 +107,7 @@ static struct thmc50_data *thmc50_update_device(struct device *dev)
 		data->alarms =
 		    i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
index 9dc210b55e69..88007416c210 100644
--- a/drivers/hwmon/tmp401.c
+++ b/drivers/hwmon/tmp401.c
@@ -136,7 +136,7 @@ struct tmp401_data {
 	struct i2c_client *client;
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 	enum chips kind;
 
@@ -267,7 +267,7 @@ static struct tmp401_data *tmp401_update_device(struct device *dev)
 		data->temp_crit_hyst = val;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 abort:
@@ -413,7 +413,7 @@ static ssize_t reset_temp_history_store(struct device *dev,
 	}
 	mutex_lock(&data->update_lock);
 	i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 
 	return count;
diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index b963a369c5ab..9063d71fc11b 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -93,7 +93,7 @@ struct tmp421_data {
 	struct hwmon_channel_info temp_info;
 	const struct hwmon_channel_info *info[2];
 	struct hwmon_chip_info chip;
-	char valid;
+	bool valid;
 	unsigned long last_updated;
 	unsigned long channels;
 	u8 config;
@@ -140,14 +140,14 @@ static int tmp421_update_device(struct tmp421_data *data)
 			data->temp[i] |= ret;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 exit:
 	mutex_unlock(&data->update_lock);
 
 	if (ret < 0) {
-		data->valid = 0;
+		data->valid = false;
 		return ret;
 	}
 
diff --git a/drivers/hwmon/via686a.c b/drivers/hwmon/via686a.c
index a2eddd2c2538..55634110c2f9 100644
--- a/drivers/hwmon/via686a.c
+++ b/drivers/hwmon/via686a.c
@@ -304,7 +304,7 @@ struct via686a_data {
 	const char *name;
 	struct device *hwmon_dev;
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[5];		/* Register value */
@@ -800,7 +800,7 @@ static struct via686a_data *via686a_update_device(struct device *dev)
 				       VIA686A_REG_ALARM1) |
 		    (via686a_read_value(data, VIA686A_REG_ALARM2) << 8);
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/vt1211.c b/drivers/hwmon/vt1211.c
index 2fbdc532aed4..4a5e911d26eb 100644
--- a/drivers/hwmon/vt1211.c
+++ b/drivers/hwmon/vt1211.c
@@ -105,7 +105,7 @@ struct vt1211_data {
 	struct device *hwmon_dev;
 
 	struct mutex update_lock;
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* Register values */
@@ -319,7 +319,7 @@ static struct vt1211_data *vt1211_update_device(struct device *dev)
 				vt1211_read8(data, VT1211_REG_ALARM1);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/vt8231.c b/drivers/hwmon/vt8231.c
index 6603727e15a0..03275ac8ba72 100644
--- a/drivers/hwmon/vt8231.c
+++ b/drivers/hwmon/vt8231.c
@@ -145,7 +145,7 @@ struct vt8231_data {
 
 	struct mutex update_lock;
 	struct device *hwmon_dev;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[6];		/* Register value */
@@ -929,7 +929,7 @@ static struct vt8231_data *vt8231_update_device(struct device *dev)
 			data->alarms &= ~0x80;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index 705a59663d42..af89b32a93a5 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -320,7 +320,7 @@ struct w83627ehf_data {
 	const u16 *scale_in;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* Register values */
@@ -688,7 +688,7 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
 						W83627EHF_REG_CASEOPEN_DET);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
@@ -1099,7 +1099,7 @@ clear_caseopen(struct device *dev, struct w83627ehf_data *data, int channel,
 	reg = w83627ehf_read_value(data, W83627EHF_REG_CASEOPEN_CLR);
 	w83627ehf_write_value(data, W83627EHF_REG_CASEOPEN_CLR, reg | mask);
 	w83627ehf_write_value(data, W83627EHF_REG_CASEOPEN_CLR, reg & ~mask);
-	data->valid = 0;	/* Force cache refresh */
+	data->valid = false;	/* Force cache refresh */
 	mutex_unlock(&data->update_lock);
 
 	return 0;
@@ -2004,7 +2004,7 @@ static int __maybe_unused w83627ehf_resume(struct device *dev)
 	w83627ehf_write_value(data, W83627EHF_REG_VBAT, data->vbat);
 
 	/* Force re-reading all values */
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 
 	return 0;
diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c
index a07b97400cba..9be277156ed2 100644
--- a/drivers/hwmon/w83627hf.c
+++ b/drivers/hwmon/w83627hf.c
@@ -355,7 +355,7 @@ struct w83627hf_data {
 	enum chips type;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[9];		/* Register value */
@@ -448,7 +448,7 @@ static int w83627hf_resume(struct device *dev)
 	w83627hf_write_value(data, W83781D_REG_SCFG2, data->scfg2);
 
 	/* Force re-reading all values */
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 
 	return 0;
@@ -1905,7 +1905,7 @@ static struct w83627hf_data *w83627hf_update_device(struct device *dev)
 		    w83627hf_read_value(data, W83781D_REG_BEEP_INTS1) |
 		    w83627hf_read_value(data, W83781D_REG_BEEP_INTS3) << 16;
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index ce8e2c10e854..b3579721265f 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -203,7 +203,7 @@ struct w83781d_data {
 	int isa_addr;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	struct i2c_client *lm75[2];	/* for secondary I2C addresses */
@@ -1554,7 +1554,7 @@ static struct w83781d_data *w83781d_update_device(struct device *dev)
 					       W83781D_REG_BEEP_INTS3) << 16;
 		}
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c
index 37b25a1474c4..ca577cd2a1c9 100644
--- a/drivers/hwmon/w83791d.c
+++ b/drivers/hwmon/w83791d.c
@@ -270,7 +270,7 @@ struct w83791d_data {
 	struct device *hwmon_dev;
 	struct mutex update_lock;
 
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* array of 2 pointers to subclients */
@@ -1603,7 +1603,7 @@ static struct w83791d_data *w83791d_update_device(struct device *dev)
 				<< 4;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83792d.c b/drivers/hwmon/w83792d.c
index abd5c3a722b9..4bfebdab1c60 100644
--- a/drivers/hwmon/w83792d.c
+++ b/drivers/hwmon/w83792d.c
@@ -261,7 +261,7 @@ struct w83792d_data {
 	struct device *hwmon_dev;
 
 	struct mutex update_lock;
-	char valid;		/* !=0 if following fields are valid */
+	bool valid;		/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 
 	/* array of 2 pointers to subclients */
@@ -743,7 +743,7 @@ intrusion0_alarm_store(struct device *dev, struct device_attribute *attr,
 	mutex_lock(&data->update_lock);
 	reg = w83792d_read_value(client, W83792D_REG_CHASSIS_CLR);
 	w83792d_write_value(client, W83792D_REG_CHASSIS_CLR, reg | 0x80);
-	data->valid = 0;		/* Force cache refresh */
+	data->valid = false;		/* Force cache refresh */
 	mutex_unlock(&data->update_lock);
 
 	return count;
@@ -1595,7 +1595,7 @@ static struct w83792d_data *w83792d_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index e7d0484eabe4..81221702951a 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -205,7 +205,7 @@ struct w83793_data {
 	struct i2c_client *lm75[2];
 	struct device *hwmon_dev;
 	struct mutex update_lock;
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	unsigned long last_nonvolatile;	/* In jiffies, last time we update the
 					 * nonvolatile registers
@@ -453,7 +453,7 @@ store_chassis_clear(struct device *dev,
 	mutex_lock(&data->update_lock);
 	reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
 	w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
-	data->valid = 0;		/* Force cache refresh */
+	data->valid = false;		/* Force cache refresh */
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -2081,7 +2081,7 @@ static struct w83793_data *w83793_update_device(struct device *dev)
 		data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
 	w83793_update_nonvolatile(dev);
 	data->last_updated = jiffies;
-	data->valid = 1;
+	data->valid = true;
 
 END:
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c
index 621b05afa837..45b12c4287df 100644
--- a/drivers/hwmon/w83795.c
+++ b/drivers/hwmon/w83795.c
@@ -379,7 +379,7 @@ struct w83795_data {
 	u8 enable_beep;
 	u8 beeps[6];		/* Register value */
 
-	char valid;
+	bool valid;
 	char valid_limits;
 	char valid_pwm_config;
 };
@@ -684,7 +684,7 @@ static struct w83795_data *w83795_update_device(struct device *dev)
 			     tmp & ~ALARM_CTRL_RTSACS);
 
 	data->last_updated = jiffies;
-	data->valid = 1;
+	data->valid = true;
 
 END:
 	mutex_unlock(&data->update_lock);
@@ -764,7 +764,7 @@ store_chassis_clear(struct device *dev,
 
 	/* Clear status and force cache refresh */
 	w83795_read(client, W83795_REG_ALARM(5));
-	data->valid = 0;
+	data->valid = false;
 	mutex_unlock(&data->update_lock);
 	return count;
 }
diff --git a/drivers/hwmon/w83l785ts.c b/drivers/hwmon/w83l785ts.c
index 656a77102ca6..a41f989d66e2 100644
--- a/drivers/hwmon/w83l785ts.c
+++ b/drivers/hwmon/w83l785ts.c
@@ -98,7 +98,7 @@ static struct i2c_driver w83l785ts_driver = {
 struct w83l785ts_data {
 	struct device *hwmon_dev;
 	struct mutex update_lock;
-	char valid; /* zero until following fields are valid */
+	bool valid; /* false until following fields are valid */
 	unsigned long last_updated; /* in jiffies */
 
 	/* registers values */
@@ -270,7 +270,7 @@ static struct w83l785ts_data *w83l785ts_update_device(struct device *dev)
 				W83L785TS_REG_TEMP_OVER, data->temp[1]);
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);
diff --git a/drivers/hwmon/w83l786ng.c b/drivers/hwmon/w83l786ng.c
index 542afff1423b..11ba23c1af85 100644
--- a/drivers/hwmon/w83l786ng.c
+++ b/drivers/hwmon/w83l786ng.c
@@ -113,7 +113,7 @@ DIV_TO_REG(long val)
 struct w83l786ng_data {
 	struct i2c_client *client;
 	struct mutex update_lock;
-	char valid;			/* !=0 if following fields are valid */
+	bool valid;			/* true if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 	unsigned long last_nonvolatile;	/* In jiffies, last time we update the
 					 * nonvolatile registers */
@@ -209,7 +209,7 @@ static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
 		data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 
 	}
 
-- 
2.17.1

Re: [PATCH] hwmon: cleanup non-bool "valid" data fields

[Guenter Roeck]

On Fri, Sep 24, 2021 at 10:52:02PM +0300, Paul Fertser wrote:
> We have bool so use it consistently in all the drivers.
> 

Please _never_ send a patch as reply to a previous patch, unless you
want it to get lost.

I have limited internet access right now, for the next week or so.
I'll review your patch afterwards.

Guenter

> The following Coccinelle script was used:
> 
> @@
> identifier T;
> type t = { char, int };
> @@
> struct T {
> ...
> -	t valid;
> +	bool valid;
> ...
> }
> 
> @@
> identifier v;
> @@
> (
> - v->valid = 0
> + v->valid = false
> |
> - v->valid = 1
> + v->valid = true
> )
> 
> followed by sed to fixup the comments:
> sed '/bool valid;/{s/!=0/true/;s/zero/false/}'
> 
> Few whitespace changes were fixed manually. All modified drivers were
> compile-tested.
> 
> Signed-off-by: Paul Fertser <fercerpav@gmail.com>
> ---
> 
> This was generated against hwmon-next branch.
> 
>  drivers/hwmon/abituguru3.c  |  6 +++---
>  drivers/hwmon/ad7414.c      |  4 ++--
>  drivers/hwmon/ad7418.c      |  6 +++---
>  drivers/hwmon/adm1021.c     |  4 ++--
>  drivers/hwmon/adm1025.c     |  4 ++--
>  drivers/hwmon/adm1026.c     |  4 ++--
>  drivers/hwmon/adm1029.c     |  4 ++--
>  drivers/hwmon/adm1031.c     |  6 +++---
>  drivers/hwmon/amc6821.c     |  8 ++++----
>  drivers/hwmon/applesmc.c    |  2 +-
>  drivers/hwmon/asb100.c      |  4 ++--
>  drivers/hwmon/asc7621.c     |  4 ++--
>  drivers/hwmon/atxp1.c       |  8 ++++----
>  drivers/hwmon/coretemp.c    |  2 +-
>  drivers/hwmon/dme1737.c     |  4 ++--
>  drivers/hwmon/ds1621.c      |  4 ++--
>  drivers/hwmon/ds620.c       |  4 ++--
>  drivers/hwmon/emc6w201.c    |  4 ++--
>  drivers/hwmon/f71805f.c     |  4 ++--
>  drivers/hwmon/f71882fg.c    |  4 ++--
>  drivers/hwmon/f75375s.c     |  4 ++--
>  drivers/hwmon/fschmd.c      |  4 ++--
>  drivers/hwmon/g760a.c       |  2 +-
>  drivers/hwmon/gl518sm.c     |  4 ++--
>  drivers/hwmon/gl520sm.c     |  4 ++--
>  drivers/hwmon/ibmaem.c      |  2 +-
>  drivers/hwmon/ibmpex.c      |  4 ++--
>  drivers/hwmon/it87.c        | 12 ++++++------
>  drivers/hwmon/lineage-pem.c |  2 +-
>  drivers/hwmon/lm63.c        |  6 +++---
>  drivers/hwmon/lm77.c        |  4 ++--
>  drivers/hwmon/lm78.c        |  4 ++--
>  drivers/hwmon/lm80.c        |  6 +++---
>  drivers/hwmon/lm83.c        |  4 ++--
>  drivers/hwmon/lm85.c        |  4 ++--
>  drivers/hwmon/lm87.c        |  4 ++--
>  drivers/hwmon/lm92.c        |  4 ++--
>  drivers/hwmon/lm93.c        |  4 ++--
>  drivers/hwmon/lm95241.c     |  8 ++++----
>  drivers/hwmon/ltc4151.c     |  2 +-
>  drivers/hwmon/ltc4215.c     |  2 +-
>  drivers/hwmon/ltc4261.c     |  4 ++--
>  drivers/hwmon/max16065.c    |  2 +-
>  drivers/hwmon/max1619.c     |  4 ++--
>  drivers/hwmon/max1668.c     |  4 ++--
>  drivers/hwmon/max6639.c     |  4 ++--
>  drivers/hwmon/max6642.c     |  2 +-
>  drivers/hwmon/pc87360.c     |  4 ++--
>  drivers/hwmon/sch5636.c     |  4 ++--
>  drivers/hwmon/sht21.c       |  4 ++--
>  drivers/hwmon/sis5595.c     |  4 ++--
>  drivers/hwmon/smm665.c      |  2 +-
>  drivers/hwmon/smsc47b397.c  |  4 ++--
>  drivers/hwmon/smsc47m192.c  |  4 ++--
>  drivers/hwmon/thmc50.c      |  4 ++--
>  drivers/hwmon/tmp401.c      |  6 +++---
>  drivers/hwmon/tmp421.c      |  6 +++---
>  drivers/hwmon/via686a.c     |  4 ++--
>  drivers/hwmon/vt1211.c      |  4 ++--
>  drivers/hwmon/vt8231.c      |  4 ++--
>  drivers/hwmon/w83627ehf.c   |  8 ++++----
>  drivers/hwmon/w83627hf.c    |  6 +++---
>  drivers/hwmon/w83781d.c     |  4 ++--
>  drivers/hwmon/w83791d.c     |  4 ++--
>  drivers/hwmon/w83792d.c     |  6 +++---
>  drivers/hwmon/w83793.c      |  6 +++---
>  drivers/hwmon/w83795.c      |  6 +++---
>  drivers/hwmon/w83l785ts.c   |  4 ++--
>  drivers/hwmon/w83l786ng.c   |  4 ++--
>  69 files changed, 151 insertions(+), 151 deletions(-)
> 
> diff --git a/drivers/hwmon/abituguru3.c b/drivers/hwmon/abituguru3.c
> index 112dd0d9377c..8229ad30c909 100644
> --- a/drivers/hwmon/abituguru3.c
> +++ b/drivers/hwmon/abituguru3.c
> @@ -145,7 +145,7 @@ struct abituguru3_data {
>  	struct device *hwmon_dev;	/* hwmon registered device */
>  	struct mutex update_lock;	/* protect access to data and uGuru */
>  	unsigned short addr;		/* uguru base address */
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/*
> @@ -1083,7 +1083,7 @@ static struct abituguru3_data *abituguru3_update_device(struct device *dev)
>  	mutex_lock(&data->update_lock);
>  	if (!data->valid || time_after(jiffies, data->last_updated + HZ)) {
>  		/* Clear data->valid while updating */
> -		data->valid = 0;
> +		data->valid = false;
>  		/* Read alarms */
>  		if (abituguru3_read_increment_offset(data,
>  				ABIT_UGURU3_SETTINGS_BANK,
> @@ -1117,7 +1117,7 @@ static struct abituguru3_data *abituguru3_update_device(struct device *dev)
>  				goto LEAVE_UPDATE;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  LEAVE_UPDATE:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ad7414.c b/drivers/hwmon/ad7414.c
> index 6a765755d061..0afb89c4629d 100644
> --- a/drivers/hwmon/ad7414.c
> +++ b/drivers/hwmon/ad7414.c
> @@ -37,7 +37,7 @@ static u8 AD7414_REG_LIMIT[] = { AD7414_REG_T_HIGH, AD7414_REG_T_LOW };
>  struct ad7414_data {
>  	struct i2c_client	*client;
>  	struct mutex		lock;	/* atomic read data updates */
> -	char			valid;	/* !=0 if following fields are valid */
> +	bool			valid;	/* true if following fields are valid */
>  	unsigned long		next_update;	/* In jiffies */
>  	s16			temp_input;	/* Register values */
>  	s8			temps[ARRAY_SIZE(AD7414_REG_LIMIT)];
> @@ -95,7 +95,7 @@ static struct ad7414_data *ad7414_update_device(struct device *dev)
>  		}
>  
>  		data->next_update = jiffies + HZ + HZ / 2;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->lock);
> diff --git a/drivers/hwmon/ad7418.c b/drivers/hwmon/ad7418.c
> index d618f6b2f382..22bdb7e5b9e0 100644
> --- a/drivers/hwmon/ad7418.c
> +++ b/drivers/hwmon/ad7418.c
> @@ -46,7 +46,7 @@ struct ad7418_data {
>  	enum chips		type;
>  	struct mutex		lock;
>  	int			adc_max;	/* number of ADC channels */
> -	char			valid;
> +	bool			valid;
>  	unsigned long		last_updated;	/* In jiffies */
>  	s16			temp[3];	/* Register values */
>  	u16			in[4];
> @@ -111,14 +111,14 @@ static int ad7418_update_device(struct device *dev)
>  			goto abort;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->lock);
>  	return 0;
>  
>  abort:
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->lock);
>  	return val;
>  }
> diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
> index 71deb2cd20f5..38b447c6e8cd 100644
> --- a/drivers/hwmon/adm1021.c
> +++ b/drivers/hwmon/adm1021.c
> @@ -72,7 +72,7 @@ struct adm1021_data {
>  	const struct attribute_group *groups[3];
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	char low_power;		/* !=0 if device in low power mode */
>  	unsigned long last_updated;	/* In jiffies */
>  
> @@ -135,7 +135,7 @@ static struct adm1021_data *adm1021_update_device(struct device *dev)
>  						ADM1023_REG_REM_OFFSET_PREC);
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/adm1025.c b/drivers/hwmon/adm1025.c
> index de51e01c061b..4352f6a884e8 100644
> --- a/drivers/hwmon/adm1025.c
> +++ b/drivers/hwmon/adm1025.c
> @@ -97,7 +97,7 @@ struct adm1025_data {
>  	struct i2c_client *client;
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	u8 in[6];		/* register value */
> @@ -148,7 +148,7 @@ static struct adm1025_data *adm1025_update_device(struct device *dev)
>  			      ADM1025_REG_VID4) & 0x01) << 4);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/adm1026.c b/drivers/hwmon/adm1026.c
> index 49cefbadb156..69b3ec752944 100644
> --- a/drivers/hwmon/adm1026.c
> +++ b/drivers/hwmon/adm1026.c
> @@ -259,7 +259,7 @@ struct adm1026_data {
>  	const struct attribute_group *groups[3];
>  
>  	struct mutex update_lock;
> -	int valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_reading;	/* In jiffies */
>  	unsigned long last_config;	/* In jiffies */
>  
> @@ -459,7 +459,7 @@ static struct adm1026_data *adm1026_update_device(struct device *dev)
>  		data->last_config = jiffies;
>  	}	/* last_config */
>  
> -	data->valid = 1;
> +	data->valid = true;
>  	mutex_unlock(&data->update_lock);
>  	return data;
>  }
> diff --git a/drivers/hwmon/adm1029.c b/drivers/hwmon/adm1029.c
> index 50b1df7b008c..3e1999413f32 100644
> --- a/drivers/hwmon/adm1029.c
> +++ b/drivers/hwmon/adm1029.c
> @@ -99,7 +99,7 @@ static const u8 ADM1029_REG_FAN_DIV[] = {
>  struct adm1029_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock; /* protect register access */
> -	char valid;		/* zero until following fields are valid */
> +	bool valid;		/* false until following fields are valid */
>  	unsigned long last_updated;	/* in jiffies */
>  
>  	/* registers values, signed for temperature, unsigned for other stuff */
> @@ -143,7 +143,7 @@ static struct adm1029_data *adm1029_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/adm1031.c b/drivers/hwmon/adm1031.c
> index b538ace2d292..257ec53ae723 100644
> --- a/drivers/hwmon/adm1031.c
> +++ b/drivers/hwmon/adm1031.c
> @@ -65,7 +65,7 @@ struct adm1031_data {
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
>  	int chip_type;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned int update_interval;	/* In milliseconds */
>  	/*
> @@ -187,7 +187,7 @@ static struct adm1031_data *adm1031_update_device(struct device *dev)
>  					ADM1031_REG_PWM) >> (4 * chan)) & 0x0f;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> @@ -650,7 +650,7 @@ static ssize_t fan_div_store(struct device *dev,
>  			    data->fan_min[nr]);
>  
>  	/* Invalidate the cache: fan speed is no longer valid */
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  	return count;
>  }
> diff --git a/drivers/hwmon/amc6821.c b/drivers/hwmon/amc6821.c
> index 6b1ce2242c61..0c16face3fd3 100644
> --- a/drivers/hwmon/amc6821.c
> +++ b/drivers/hwmon/amc6821.c
> @@ -141,7 +141,7 @@ static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI,
>  struct amc6821_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* register values */
> @@ -258,7 +258,7 @@ static struct amc6821_data *amc6821_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  	mutex_unlock(&data->update_lock);
>  	return data;
> @@ -511,7 +511,7 @@ static ssize_t temp_auto_point_temp_store(struct device *dev,
>  	}
>  
>  	mutex_lock(&data->update_lock);
> -	data->valid = 0;
> +	data->valid = false;
>  
>  	switch (ix) {
>  	case 0:
> @@ -584,7 +584,7 @@ static ssize_t pwm1_auto_point_pwm_store(struct device *dev,
>  	}
>  
>  EXIT:
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  	return count;
>  }
> diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
> index c31759794a29..fc6d6a9053ce 100644
> --- a/drivers/hwmon/applesmc.c
> +++ b/drivers/hwmon/applesmc.c
> @@ -391,7 +391,7 @@ static const struct applesmc_entry *applesmc_get_entry_by_index(int index)
>  	cache->len = info[0];
>  	memcpy(cache->type, &info[1], 4);
>  	cache->flags = info[5];
> -	cache->valid = 1;
> +	cache->valid = true;
>  
>  out:
>  	mutex_unlock(&smcreg.mutex);
> diff --git a/drivers/hwmon/asb100.c b/drivers/hwmon/asb100.c
> index ba9fcf6f9264..8cf0bcb85eb4 100644
> --- a/drivers/hwmon/asb100.c
> +++ b/drivers/hwmon/asb100.c
> @@ -186,7 +186,7 @@ struct asb100_data {
>  	/* array of 2 pointers to subclients */
>  	struct i2c_client *lm75[2];
>  
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	u8 in[7];		/* Register value */
>  	u8 in_max[7];		/* Register value */
>  	u8 in_min[7];		/* Register value */
> @@ -993,7 +993,7 @@ static struct asb100_data *asb100_update_device(struct device *dev)
>  			(asb100_read_value(client, ASB100_REG_ALARM2) << 8);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  
>  		dev_dbg(&client->dev, "... device update complete\n");
>  	}
> diff --git a/drivers/hwmon/asc7621.c b/drivers/hwmon/asc7621.c
> index 600ffc7e1900..e835605a7456 100644
> --- a/drivers/hwmon/asc7621.c
> +++ b/drivers/hwmon/asc7621.c
> @@ -77,7 +77,7 @@ struct asc7621_data {
>  	struct i2c_client client;
>  	struct device *class_dev;
>  	struct mutex update_lock;
> -	int valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_high_reading;	/* In jiffies */
>  	unsigned long last_low_reading;		/* In jiffies */
>  	/*
> @@ -1032,7 +1032,7 @@ static struct asc7621_data *asc7621_update_device(struct device *dev)
>  		data->last_low_reading = jiffies;
>  	}			/* last_reading */
>  
> -	data->valid = 1;
> +	data->valid = true;
>  
>  	mutex_unlock(&data->update_lock);
>  
> diff --git a/drivers/hwmon/atxp1.c b/drivers/hwmon/atxp1.c
> index 1e08a5431f12..24e7da68c064 100644
> --- a/drivers/hwmon/atxp1.c
> +++ b/drivers/hwmon/atxp1.c
> @@ -63,7 +63,7 @@ static struct atxp1_data *atxp1_update_device(struct device *dev)
>  		data->reg.gpio1 = i2c_smbus_read_byte_data(client, ATXP1_GPIO1);
>  		data->reg.gpio2 = i2c_smbus_read_byte_data(client, ATXP1_GPIO2);
>  
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> @@ -136,7 +136,7 @@ static ssize_t cpu0_vid_store(struct device *dev,
>  						ATXP1_VID, cvid | ATXP1_VIDENA);
>  	}
>  
> -	data->valid = 0;
> +	data->valid = false;
>  
>  	return count;
>  }
> @@ -180,7 +180,7 @@ static ssize_t gpio1_store(struct device *dev, struct device_attribute *attr,
>  
>  		i2c_smbus_write_byte_data(client, ATXP1_GPIO1, value);
>  
> -		data->valid = 0;
> +		data->valid = false;
>  	}
>  
>  	return count;
> @@ -224,7 +224,7 @@ static ssize_t gpio2_store(struct device *dev, struct device_attribute *attr,
>  
>  		i2c_smbus_write_byte_data(client, ATXP1_GPIO2, value);
>  
> -		data->valid = 0;
> +		data->valid = false;
>  	}
>  
>  	return count;
> diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
> index bb9211215a68..ccf0af5b988a 100644
> --- a/drivers/hwmon/coretemp.c
> +++ b/drivers/hwmon/coretemp.c
> @@ -167,7 +167,7 @@ static ssize_t show_temp(struct device *dev,
>  		 * really help at all.
>  		 */
>  		tdata->temp = tdata->tjmax - ((eax >> 16) & 0x7f) * 1000;
> -		tdata->valid = 1;
> +		tdata->valid = true;
>  		tdata->last_updated = jiffies;
>  	}
>  
> diff --git a/drivers/hwmon/dme1737.c b/drivers/hwmon/dme1737.c
> index c1e4cfb40c3d..e3ad4c2d0038 100644
> --- a/drivers/hwmon/dme1737.c
> +++ b/drivers/hwmon/dme1737.c
> @@ -203,7 +203,7 @@ struct dme1737_data {
>  	unsigned int addr;		/* for ISA devices only */
>  
>  	struct mutex update_lock;
> -	int valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_update;	/* in jiffies */
>  	unsigned long last_vbat;	/* in jiffies */
>  	enum chips type;
> @@ -778,7 +778,7 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
>  		}
>  
>  		data->last_update = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
> index bf1c4b7ecb40..0886abf6ebab 100644
> --- a/drivers/hwmon/ds1621.c
> +++ b/drivers/hwmon/ds1621.c
> @@ -109,7 +109,7 @@ static const u8 DS1621_REG_TEMP[3] = {
>  struct ds1621_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	enum chips kind;		/* device type */
>  
> @@ -213,7 +213,7 @@ static struct ds1621_data *ds1621_update_client(struct device *dev)
>  						  new_conf);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ds620.c b/drivers/hwmon/ds620.c
> index 9ec722798c4a..82d7c3d58f49 100644
> --- a/drivers/hwmon/ds620.c
> +++ b/drivers/hwmon/ds620.c
> @@ -56,7 +56,7 @@ static const u8 DS620_REG_TEMP[3] = {
>  struct ds620_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	s16 temp[3];		/* Register values, word */
> @@ -118,7 +118,7 @@ static struct ds620_data *ds620_update_client(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/emc6w201.c b/drivers/hwmon/emc6w201.c
> index ec5c98702bf5..29082c8463f4 100644
> --- a/drivers/hwmon/emc6w201.c
> +++ b/drivers/hwmon/emc6w201.c
> @@ -45,7 +45,7 @@ enum subfeature { input, min, max };
>  struct emc6w201_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* registers values */
> @@ -162,7 +162,7 @@ static struct emc6w201_data *emc6w201_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/f71805f.c b/drivers/hwmon/f71805f.c
> index 67b47de8263a..7f20edb0677c 100644
> --- a/drivers/hwmon/f71805f.c
> +++ b/drivers/hwmon/f71805f.c
> @@ -165,7 +165,7 @@ struct f71805f_data {
>  	struct device *hwmon_dev;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned long last_limits;	/* In jiffies */
>  
> @@ -404,7 +404,7 @@ static struct f71805f_data *f71805f_update_device(struct device *dev)
>  			+ (f71805f_read8(data, F71805F_REG_STATUS(2)) << 16);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c
> index 4dec793fd07d..4673d403759a 100644
> --- a/drivers/hwmon/f71882fg.c
> +++ b/drivers/hwmon/f71882fg.c
> @@ -253,7 +253,7 @@ struct f71882fg_data {
>  
>  	struct mutex update_lock;
>  	int temp_start;			/* temp numbering start (0 or 1) */
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	char auto_point_temp_signed;
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned long last_limits;	/* In jiffies */
> @@ -1359,7 +1359,7 @@ static struct f71882fg_data *f71882fg_update_device(struct device *dev)
>  							F71882FG_REG_IN(nr));
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
> index 3e567be60fb1..57c8a473698d 100644
> --- a/drivers/hwmon/f75375s.c
> +++ b/drivers/hwmon/f75375s.c
> @@ -85,7 +85,7 @@ struct f75375_data {
>  	const char *name;
>  	int kind;
>  	struct mutex update_lock; /* protect register access */
> -	char valid;
> +	bool valid;
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned long last_limits;	/* In jiffies */
>  
> @@ -228,7 +228,7 @@ static struct f75375_data *f75375_update_device(struct device *dev)
>  				f75375_read8(client, F75375_REG_VOLT(nr));
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/fschmd.c b/drivers/hwmon/fschmd.c
> index 5191cd85a8d1..c26195e3aad7 100644
> --- a/drivers/hwmon/fschmd.c
> +++ b/drivers/hwmon/fschmd.c
> @@ -264,7 +264,7 @@ struct fschmd_data {
>  	unsigned long watchdog_is_open;
>  	char watchdog_expect_close;
>  	char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* register values */
> @@ -1356,7 +1356,7 @@ static struct fschmd_data *fschmd_update_device(struct device *dev)
>  					       FSCHMD_REG_VOLT[data->kind][i]);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/g760a.c b/drivers/hwmon/g760a.c
> index a692f7b2f6f7..36717b524dbd 100644
> --- a/drivers/hwmon/g760a.c
> +++ b/drivers/hwmon/g760a.c
> @@ -95,7 +95,7 @@ static struct g760a_data *g760a_update_client(struct device *dev)
>  		data->fan_sta = g760a_read_value(client, G760A_REG_FAN_STA);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/gl518sm.c b/drivers/hwmon/gl518sm.c
> index 7aaee5a48243..dd683b0a648f 100644
> --- a/drivers/hwmon/gl518sm.c
> +++ b/drivers/hwmon/gl518sm.c
> @@ -107,7 +107,7 @@ struct gl518_data {
>  	enum chips type;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 voltage_in[4];	/* Register values; [0] = VDD */
> @@ -211,7 +211,7 @@ static struct gl518_data *gl518_update_device(struct device *dev)
>  		    gl518_read_value(client, GL518_REG_VIN3);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/gl520sm.c b/drivers/hwmon/gl520sm.c
> index 4ae1295cc3ea..096ba9797211 100644
> --- a/drivers/hwmon/gl520sm.c
> +++ b/drivers/hwmon/gl520sm.c
> @@ -64,7 +64,7 @@ struct gl520_data {
>  	struct i2c_client *client;
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
> -	char valid;		/* zero until the following fields are valid */
> +	bool valid;		/* false until the following fields are valid */
>  	unsigned long last_updated;	/* in jiffies */
>  
>  	u8 vid;
> @@ -174,7 +174,7 @@ static struct gl520_data *gl520_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c
> index a4ec85207782..de6baf6ca3d1 100644
> --- a/drivers/hwmon/ibmaem.c
> +++ b/drivers/hwmon/ibmaem.c
> @@ -127,7 +127,7 @@ struct aem_data {
>  	struct device		*hwmon_dev;
>  	struct platform_device	*pdev;
>  	struct mutex		lock;
> -	char			valid;
> +	bool			valid;
>  	unsigned long		last_updated;	/* In jiffies */
>  	u8			ver_major;
>  	u8			ver_minor;
> diff --git a/drivers/hwmon/ibmpex.c b/drivers/hwmon/ibmpex.c
> index b2ab83c9fd9a..f6ec165c0fa8 100644
> --- a/drivers/hwmon/ibmpex.c
> +++ b/drivers/hwmon/ibmpex.c
> @@ -66,7 +66,7 @@ struct ibmpex_bmc_data {
>  	struct device		*hwmon_dev;
>  	struct device		*bmc_device;
>  	struct mutex		lock;
> -	char			valid;
> +	bool			valid;
>  	unsigned long		last_updated;	/* In jiffies */
>  
>  	struct ipmi_addr	address;
> @@ -239,7 +239,7 @@ static void ibmpex_update_device(struct ibmpex_bmc_data *data)
>  	}
>  
>  	data->last_updated = jiffies;
> -	data->valid = 1;
> +	data->valid = true;
>  
>  out:
>  	mutex_unlock(&data->lock);
> diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
> index 1f93134afcb9..0e543dbe0a6b 100644
> --- a/drivers/hwmon/it87.c
> +++ b/drivers/hwmon/it87.c
> @@ -519,7 +519,7 @@ struct it87_data {
>  	unsigned short addr;
>  	const char *name;
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u16 in_scaled;		/* Internal voltage sensors are scaled */
> @@ -844,7 +844,7 @@ static struct it87_data *it87_update_device(struct device *dev)
>  			data->vid &= 0x3f;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> @@ -980,7 +980,7 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
>  			regval |= 0x80;
>  			it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
>  		}
> -		data->valid = 0;
> +		data->valid = false;
>  		reg = IT87_REG_TEMP_OFFSET[nr];
>  		break;
>  	}
> @@ -1079,7 +1079,7 @@ static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
>  	it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
>  	if (has_temp_old_peci(data, nr))
>  		it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
> -	data->valid = 0;	/* Force cache refresh */
> +	data->valid = false;	/* Force cache refresh */
>  	mutex_unlock(&data->update_lock);
>  	return count;
>  }
> @@ -1834,7 +1834,7 @@ static ssize_t clear_intrusion(struct device *dev,
>  		config |= BIT(5);
>  		it87_write_value(data, IT87_REG_CONFIG, config);
>  		/* Invalidate cache to force re-read */
> -		data->valid = 0;
> +		data->valid = false;
>  	}
>  	mutex_unlock(&data->update_lock);
>  
> @@ -3229,7 +3229,7 @@ static int __maybe_unused it87_resume(struct device *dev)
>  	it87_start_monitoring(data);
>  
>  	/* force update */
> -	data->valid = 0;
> +	data->valid = false;
>  
>  	mutex_unlock(&data->update_lock);
>  
> diff --git a/drivers/hwmon/lineage-pem.c b/drivers/hwmon/lineage-pem.c
> index 1109fffa76fb..ef5a49cd9149 100644
> --- a/drivers/hwmon/lineage-pem.c
> +++ b/drivers/hwmon/lineage-pem.c
> @@ -191,7 +191,7 @@ static struct pem_data *pem_update_device(struct device *dev)
>  		i2c_smbus_write_byte(client, PEM_CLEAR_INFO_FLAGS);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c
> index c8f93c5d1ccc..339a145afc09 100644
> --- a/drivers/hwmon/lm63.c
> +++ b/drivers/hwmon/lm63.c
> @@ -139,7 +139,7 @@ struct lm63_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
>  	const struct attribute_group *groups[5];
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	char lut_valid; /* zero until lut fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  	unsigned long lut_last_updated; /* in jiffies */
> @@ -289,7 +289,7 @@ static struct lm63_data *lm63_update_device(struct device *dev)
>  			       LM63_REG_ALERT_STATUS) & 0x7F;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	lm63_update_lut(data);
> @@ -714,7 +714,7 @@ static ssize_t temp2_type_store(struct device *dev,
>  	reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
>  	i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
>  				  reg | (data->trutherm ? 0x02 : 0x00));
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  
>  	return count;
> diff --git a/drivers/hwmon/lm77.c b/drivers/hwmon/lm77.c
> index 7570c9d50ddc..df6af85e170a 100644
> --- a/drivers/hwmon/lm77.c
> +++ b/drivers/hwmon/lm77.c
> @@ -55,7 +55,7 @@ static const u8 temp_regs[t_num_temp] = {
>  struct lm77_data {
>  	struct i2c_client	*client;
>  	struct mutex		update_lock;
> -	char			valid;
> +	bool			valid;
>  	unsigned long		last_updated;	/* In jiffies */
>  	int			temp[t_num_temp]; /* index using temp_index */
>  	u8			alarms;
> @@ -118,7 +118,7 @@ static struct lm77_data *lm77_update_device(struct device *dev)
>  		data->alarms =
>  			lm77_read_value(client, LM77_REG_TEMP) & 0x0007;
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm78.c b/drivers/hwmon/lm78.c
> index 1aa35ca0c6fe..5e129cbec1cb 100644
> --- a/drivers/hwmon/lm78.c
> +++ b/drivers/hwmon/lm78.c
> @@ -117,7 +117,7 @@ struct lm78_data {
>  	int isa_addr;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[7];		/* Register value */
> @@ -772,7 +772,7 @@ static struct lm78_data *lm78_update_device(struct device *dev)
>  		data->alarms = lm78_read_value(data, LM78_REG_ALARM1) +
>  		    (lm78_read_value(data, LM78_REG_ALARM2) << 8);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  
>  		data->fan_div[2] = 1;
>  	}
> diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
> index 97ab491d2922..e85e062bbf32 100644
> --- a/drivers/hwmon/lm80.c
> +++ b/drivers/hwmon/lm80.c
> @@ -117,7 +117,7 @@ struct lm80_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
>  	char error;		/* !=0 if error occurred during last update */
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[i_num_in][7];	/* Register value, 1st index is enum in_index */
> @@ -236,14 +236,14 @@ static struct lm80_data *lm80_update_device(struct device *dev)
>  		data->alarms = prev_rv + (rv << 8);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  		data->error = 0;
>  	}
>  	goto done;
>  
>  abort:
>  	ret = ERR_PTR(rv);
> -	data->valid = 0;
> +	data->valid = false;
>  	data->error = 1;
>  
>  done:
> diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c
> index 2ff5ecce608e..74fd7aa373a3 100644
> --- a/drivers/hwmon/lm83.c
> +++ b/drivers/hwmon/lm83.c
> @@ -105,7 +105,7 @@ struct lm83_data {
>  	struct i2c_client *client;
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* registers values */
> @@ -137,7 +137,7 @@ static struct lm83_data *lm83_update_device(struct device *dev)
>  		    << 8);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm85.c b/drivers/hwmon/lm85.c
> index c7bf5de7b70f..88cf2012d34b 100644
> --- a/drivers/hwmon/lm85.c
> +++ b/drivers/hwmon/lm85.c
> @@ -294,7 +294,7 @@ struct lm85_data {
>  	bool has_vid5;	/* true if VID5 is configured for ADT7463 or ADT7468 */
>  
>  	struct mutex update_lock;
> -	int valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_reading;	/* In jiffies */
>  	unsigned long last_config;	/* In jiffies */
>  
> @@ -541,7 +541,7 @@ static struct lm85_data *lm85_update_device(struct device *dev)
>  		data->last_config = jiffies;
>  	}  /* last_config */
>  
> -	data->valid = 1;
> +	data->valid = true;
>  
>  	mutex_unlock(&data->update_lock);
>  
> diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c
> index b2d820125bb6..1750bc588856 100644
> --- a/drivers/hwmon/lm87.c
> +++ b/drivers/hwmon/lm87.c
> @@ -141,7 +141,7 @@ static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
>  
>  struct lm87_data {
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* In jiffies */
>  
>  	u8 channel;		/* register value */
> @@ -251,7 +251,7 @@ static struct lm87_data *lm87_update_device(struct device *dev)
>  		data->aout = lm87_read_value(client, LM87_REG_AOUT);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm92.c b/drivers/hwmon/lm92.c
> index 9bf278cf0bd0..5bae6eedcaf1 100644
> --- a/drivers/hwmon/lm92.c
> +++ b/drivers/hwmon/lm92.c
> @@ -99,7 +99,7 @@ static const u8 regs[t_num_regs] = {
>  struct lm92_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* registers values */
> @@ -126,7 +126,7 @@ static struct lm92_data *lm92_update_device(struct device *dev)
>  				i2c_smbus_read_word_swapped(client, regs[i]);
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm93.c b/drivers/hwmon/lm93.c
> index 78d6dfaf145b..dc67bf954b21 100644
> --- a/drivers/hwmon/lm93.c
> +++ b/drivers/hwmon/lm93.c
> @@ -202,7 +202,7 @@ struct lm93_data {
>  	/* client update function */
>  	void (*update)(struct lm93_data *, struct i2c_client *);
>  
> -	char valid; /* !=0 if following fields are valid */
> +	bool valid; /* true if following fields are valid */
>  
>  	/* register values, arranged by block read groups */
>  	struct block1_t block1;
> @@ -917,7 +917,7 @@ static struct lm93_data *lm93_update_device(struct device *dev)
>  
>  		data->update(data, client);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm95241.c b/drivers/hwmon/lm95241.c
> index 00dbc170c8c6..8ea46ff20be5 100644
> --- a/drivers/hwmon/lm95241.c
> +++ b/drivers/hwmon/lm95241.c
> @@ -78,7 +78,7 @@ struct lm95241_data {
>  	struct mutex update_lock;
>  	unsigned long last_updated;	/* in jiffies */
>  	unsigned long interval;		/* in milli-seconds */
> -	char valid;		/* zero until following fields are valid */
> +	bool valid;		/* false until following fields are valid */
>  	/* registers values */
>  	u8 temp[ARRAY_SIZE(lm95241_reg_address)];
>  	u8 status, config, model, trutherm;
> @@ -118,7 +118,7 @@ static struct lm95241_data *lm95241_update_device(struct device *dev)
>  		data->status = i2c_smbus_read_byte_data(client,
>  							LM95241_REG_R_STATUS);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> @@ -257,7 +257,7 @@ static int lm95241_write_temp(struct device *dev, u32 attr, int channel,
>  			else
>  				data->config &= ~R2DF_MASK;
>  		}
> -		data->valid = 0;
> +		data->valid = false;
>  		ret = i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG,
>  						data->config);
>  		break;
> @@ -273,7 +273,7 @@ static int lm95241_write_temp(struct device *dev, u32 attr, int channel,
>  			else
>  				data->config &= ~R2DF_MASK;
>  		}
> -		data->valid = 0;
> +		data->valid = false;
>  		ret = i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG,
>  						data->config);
>  		break;
> diff --git a/drivers/hwmon/ltc4151.c b/drivers/hwmon/ltc4151.c
> index 13b85367a21f..e3ac004c1ed1 100644
> --- a/drivers/hwmon/ltc4151.c
> +++ b/drivers/hwmon/ltc4151.c
> @@ -77,7 +77,7 @@ static struct ltc4151_data *ltc4151_update_device(struct device *dev)
>  			data->regs[i] = val;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ltc4215.c b/drivers/hwmon/ltc4215.c
> index 1d18c212054f..fa43d26ddd4f 100644
> --- a/drivers/hwmon/ltc4215.c
> +++ b/drivers/hwmon/ltc4215.c
> @@ -64,7 +64,7 @@ static struct ltc4215_data *ltc4215_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ltc4261.c b/drivers/hwmon/ltc4261.c
> index b81e9c3d297b..b91cc4fe84e5 100644
> --- a/drivers/hwmon/ltc4261.c
> +++ b/drivers/hwmon/ltc4261.c
> @@ -73,13 +73,13 @@ static struct ltc4261_data *ltc4261_update_device(struct device *dev)
>  					"Failed to read ADC value: error %d\n",
>  					val);
>  				ret = ERR_PTR(val);
> -				data->valid = 0;
> +				data->valid = false;
>  				goto abort;
>  			}
>  			data->regs[i] = val;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/max16065.c b/drivers/hwmon/max16065.c
> index ae3a6a7bdaa2..daa5d8af1e69 100644
> --- a/drivers/hwmon/max16065.c
> +++ b/drivers/hwmon/max16065.c
> @@ -166,7 +166,7 @@ static struct max16065_data *max16065_update_device(struct device *dev)
>  			  = i2c_smbus_read_byte_data(client, MAX16065_FAULT(i));
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  	mutex_unlock(&data->update_lock);
>  	return data;
> diff --git a/drivers/hwmon/max1619.c b/drivers/hwmon/max1619.c
> index 8bd941cae4d1..eae9e68027bc 100644
> --- a/drivers/hwmon/max1619.c
> +++ b/drivers/hwmon/max1619.c
> @@ -79,7 +79,7 @@ enum temp_index {
>  struct max1619_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* registers values */
> @@ -124,7 +124,7 @@ static struct max1619_data *max1619_update_device(struct device *dev)
>  			data->alarms ^= 0x02;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/max1668.c b/drivers/hwmon/max1668.c
> index 5c41c78f0458..78688e6cb87d 100644
> --- a/drivers/hwmon/max1668.c
> +++ b/drivers/hwmon/max1668.c
> @@ -58,7 +58,7 @@ struct max1668_data {
>  	enum chips type;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* 1x local and 4x remote */
> @@ -120,7 +120,7 @@ static struct max1668_data *max1668_update_device(struct device *dev)
>  	data->alarms |= val;
>  
>  	data->last_updated = jiffies;
> -	data->valid = 1;
> +	data->valid = true;
>  abort:
>  	mutex_unlock(&data->update_lock);
>  
> diff --git a/drivers/hwmon/max6639.c b/drivers/hwmon/max6639.c
> index b71899c641fa..ccc0f047bd44 100644
> --- a/drivers/hwmon/max6639.c
> +++ b/drivers/hwmon/max6639.c
> @@ -69,7 +69,7 @@ static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 };
>  struct max6639_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* Register values sampled regularly */
> @@ -141,7 +141,7 @@ static struct max6639_data *max6639_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/max6642.c b/drivers/hwmon/max6642.c
> index 23d93142b0b3..699d265aae2e 100644
> --- a/drivers/hwmon/max6642.c
> +++ b/drivers/hwmon/max6642.c
> @@ -181,7 +181,7 @@ static struct max6642_data *max6642_update_device(struct device *dev)
>  					MAX6642_REG_R_STATUS);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/pc87360.c b/drivers/hwmon/pc87360.c
> index 6a9ba23cd302..0828436a1f6c 100644
> --- a/drivers/hwmon/pc87360.c
> +++ b/drivers/hwmon/pc87360.c
> @@ -178,7 +178,7 @@ struct pc87360_data {
>  	struct device *hwmon_dev;
>  	struct mutex lock;
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	int address[3];
> @@ -1673,7 +1673,7 @@ static struct pc87360_data *pc87360_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/sch5636.c b/drivers/hwmon/sch5636.c
> index a5cd4de36575..39ff1c9b1df5 100644
> --- a/drivers/hwmon/sch5636.c
> +++ b/drivers/hwmon/sch5636.c
> @@ -56,7 +56,7 @@ struct sch5636_data {
>  	struct device *hwmon_dev;
>  
>  	struct mutex update_lock;
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	u8 in[SCH5636_NO_INS];
>  	u8 temp_val[SCH5636_NO_TEMPS];
> @@ -140,7 +140,7 @@ static struct sch5636_data *sch5636_update_device(struct device *dev)
>  	}
>  
>  	data->last_updated = jiffies;
> -	data->valid = 1;
> +	data->valid = true;
>  abort:
>  	mutex_unlock(&data->update_lock);
>  	return ret;
> diff --git a/drivers/hwmon/sht21.c b/drivers/hwmon/sht21.c
> index 7d18ce5d3839..e23dbf287233 100644
> --- a/drivers/hwmon/sht21.c
> +++ b/drivers/hwmon/sht21.c
> @@ -41,7 +41,7 @@ struct sht21 {
>  	unsigned long last_update;
>  	int temperature;
>  	int humidity;
> -	char valid;
> +	bool valid;
>  	char eic[18];
>  };
>  
> @@ -105,7 +105,7 @@ static int sht21_update_measurements(struct device *dev)
>  			goto out;
>  		sht21->humidity = sht21_rh_ticks_to_per_cent_mille(ret);
>  		sht21->last_update = jiffies;
> -		sht21->valid = 1;
> +		sht21->valid = true;
>  	}
>  out:
>  	mutex_unlock(&sht21->lock);
> diff --git a/drivers/hwmon/sis5595.c b/drivers/hwmon/sis5595.c
> index 0c6741f949f5..018cb5a7651f 100644
> --- a/drivers/hwmon/sis5595.c
> +++ b/drivers/hwmon/sis5595.c
> @@ -172,7 +172,7 @@ struct sis5595_data {
>  	struct mutex lock;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	char maxins;		/* == 3 if temp enabled, otherwise == 4 */
>  	u8 revision;		/* Reg. value */
> @@ -728,7 +728,7 @@ static struct sis5595_data *sis5595_update_device(struct device *dev)
>  		    sis5595_read_value(data, SIS5595_REG_ALARM1) |
>  		    (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/smm665.c b/drivers/hwmon/smm665.c
> index 62906d9c4b86..8c4ed72e5d68 100644
> --- a/drivers/hwmon/smm665.c
> +++ b/drivers/hwmon/smm665.c
> @@ -265,7 +265,7 @@ static struct smm665_data *smm665_update_device(struct device *dev)
>  			data->adc[i] = val;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/smsc47b397.c b/drivers/hwmon/smsc47b397.c
> index f928b8d4ff48..c26d6eae0e4e 100644
> --- a/drivers/hwmon/smsc47b397.c
> +++ b/drivers/hwmon/smsc47b397.c
> @@ -96,7 +96,7 @@ struct smsc47b397_data {
>  
>  	struct mutex update_lock;
>  	unsigned long last_updated; /* in jiffies */
> -	int valid;
> +	bool valid;
>  
>  	/* register values */
>  	u16 fan[4];
> @@ -137,7 +137,7 @@ static struct smsc47b397_data *smsc47b397_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  
>  		dev_dbg(dev, "... device update complete\n");
>  	}
> diff --git a/drivers/hwmon/smsc47m192.c b/drivers/hwmon/smsc47m192.c
> index 03a87aa2017a..a5db15c087ae 100644
> --- a/drivers/hwmon/smsc47m192.c
> +++ b/drivers/hwmon/smsc47m192.c
> @@ -86,7 +86,7 @@ struct smsc47m192_data {
>  	struct i2c_client *client;
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[8];		/* Register value */
> @@ -157,7 +157,7 @@ static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
>  						SMSC47M192_REG_ALARM2) << 8);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/thmc50.c b/drivers/hwmon/thmc50.c
> index fde5e2d0825a..6a804f5036f4 100644
> --- a/drivers/hwmon/thmc50.c
> +++ b/drivers/hwmon/thmc50.c
> @@ -62,7 +62,7 @@ struct thmc50_data {
>  	enum chips type;
>  	unsigned long last_updated;	/* In jiffies */
>  	char has_temp3;		/* !=0 if it is ADM1022 in temp3 mode */
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  
>  	/* Register values */
>  	s8 temp_input[3];
> @@ -107,7 +107,7 @@ static struct thmc50_data *thmc50_update_device(struct device *dev)
>  		data->alarms =
>  		    i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
> index 9dc210b55e69..88007416c210 100644
> --- a/drivers/hwmon/tmp401.c
> +++ b/drivers/hwmon/tmp401.c
> @@ -136,7 +136,7 @@ struct tmp401_data {
>  	struct i2c_client *client;
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  	enum chips kind;
>  
> @@ -267,7 +267,7 @@ static struct tmp401_data *tmp401_update_device(struct device *dev)
>  		data->temp_crit_hyst = val;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  abort:
> @@ -413,7 +413,7 @@ static ssize_t reset_temp_history_store(struct device *dev,
>  	}
>  	mutex_lock(&data->update_lock);
>  	i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  
>  	return count;
> diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
> index b963a369c5ab..9063d71fc11b 100644
> --- a/drivers/hwmon/tmp421.c
> +++ b/drivers/hwmon/tmp421.c
> @@ -93,7 +93,7 @@ struct tmp421_data {
>  	struct hwmon_channel_info temp_info;
>  	const struct hwmon_channel_info *info[2];
>  	struct hwmon_chip_info chip;
> -	char valid;
> +	bool valid;
>  	unsigned long last_updated;
>  	unsigned long channels;
>  	u8 config;
> @@ -140,14 +140,14 @@ static int tmp421_update_device(struct tmp421_data *data)
>  			data->temp[i] |= ret;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  exit:
>  	mutex_unlock(&data->update_lock);
>  
>  	if (ret < 0) {
> -		data->valid = 0;
> +		data->valid = false;
>  		return ret;
>  	}
>  
> diff --git a/drivers/hwmon/via686a.c b/drivers/hwmon/via686a.c
> index a2eddd2c2538..55634110c2f9 100644
> --- a/drivers/hwmon/via686a.c
> +++ b/drivers/hwmon/via686a.c
> @@ -304,7 +304,7 @@ struct via686a_data {
>  	const char *name;
>  	struct device *hwmon_dev;
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[5];		/* Register value */
> @@ -800,7 +800,7 @@ static struct via686a_data *via686a_update_device(struct device *dev)
>  				       VIA686A_REG_ALARM1) |
>  		    (via686a_read_value(data, VIA686A_REG_ALARM2) << 8);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/vt1211.c b/drivers/hwmon/vt1211.c
> index 2fbdc532aed4..4a5e911d26eb 100644
> --- a/drivers/hwmon/vt1211.c
> +++ b/drivers/hwmon/vt1211.c
> @@ -105,7 +105,7 @@ struct vt1211_data {
>  	struct device *hwmon_dev;
>  
>  	struct mutex update_lock;
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* Register values */
> @@ -319,7 +319,7 @@ static struct vt1211_data *vt1211_update_device(struct device *dev)
>  				vt1211_read8(data, VT1211_REG_ALARM1);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/vt8231.c b/drivers/hwmon/vt8231.c
> index 6603727e15a0..03275ac8ba72 100644
> --- a/drivers/hwmon/vt8231.c
> +++ b/drivers/hwmon/vt8231.c
> @@ -145,7 +145,7 @@ struct vt8231_data {
>  
>  	struct mutex update_lock;
>  	struct device *hwmon_dev;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[6];		/* Register value */
> @@ -929,7 +929,7 @@ static struct vt8231_data *vt8231_update_device(struct device *dev)
>  			data->alarms &= ~0x80;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
> index 705a59663d42..af89b32a93a5 100644
> --- a/drivers/hwmon/w83627ehf.c
> +++ b/drivers/hwmon/w83627ehf.c
> @@ -320,7 +320,7 @@ struct w83627ehf_data {
>  	const u16 *scale_in;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* Register values */
> @@ -688,7 +688,7 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
>  						W83627EHF_REG_CASEOPEN_DET);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> @@ -1099,7 +1099,7 @@ clear_caseopen(struct device *dev, struct w83627ehf_data *data, int channel,
>  	reg = w83627ehf_read_value(data, W83627EHF_REG_CASEOPEN_CLR);
>  	w83627ehf_write_value(data, W83627EHF_REG_CASEOPEN_CLR, reg | mask);
>  	w83627ehf_write_value(data, W83627EHF_REG_CASEOPEN_CLR, reg & ~mask);
> -	data->valid = 0;	/* Force cache refresh */
> +	data->valid = false;	/* Force cache refresh */
>  	mutex_unlock(&data->update_lock);
>  
>  	return 0;
> @@ -2004,7 +2004,7 @@ static int __maybe_unused w83627ehf_resume(struct device *dev)
>  	w83627ehf_write_value(data, W83627EHF_REG_VBAT, data->vbat);
>  
>  	/* Force re-reading all values */
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  
>  	return 0;
> diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c
> index a07b97400cba..9be277156ed2 100644
> --- a/drivers/hwmon/w83627hf.c
> +++ b/drivers/hwmon/w83627hf.c
> @@ -355,7 +355,7 @@ struct w83627hf_data {
>  	enum chips type;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[9];		/* Register value */
> @@ -448,7 +448,7 @@ static int w83627hf_resume(struct device *dev)
>  	w83627hf_write_value(data, W83781D_REG_SCFG2, data->scfg2);
>  
>  	/* Force re-reading all values */
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  
>  	return 0;
> @@ -1905,7 +1905,7 @@ static struct w83627hf_data *w83627hf_update_device(struct device *dev)
>  		    w83627hf_read_value(data, W83781D_REG_BEEP_INTS1) |
>  		    w83627hf_read_value(data, W83781D_REG_BEEP_INTS3) << 16;
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
> index ce8e2c10e854..b3579721265f 100644
> --- a/drivers/hwmon/w83781d.c
> +++ b/drivers/hwmon/w83781d.c
> @@ -203,7 +203,7 @@ struct w83781d_data {
>  	int isa_addr;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	struct i2c_client *lm75[2];	/* for secondary I2C addresses */
> @@ -1554,7 +1554,7 @@ static struct w83781d_data *w83781d_update_device(struct device *dev)
>  					       W83781D_REG_BEEP_INTS3) << 16;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c
> index 37b25a1474c4..ca577cd2a1c9 100644
> --- a/drivers/hwmon/w83791d.c
> +++ b/drivers/hwmon/w83791d.c
> @@ -270,7 +270,7 @@ struct w83791d_data {
>  	struct device *hwmon_dev;
>  	struct mutex update_lock;
>  
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* array of 2 pointers to subclients */
> @@ -1603,7 +1603,7 @@ static struct w83791d_data *w83791d_update_device(struct device *dev)
>  				<< 4;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83792d.c b/drivers/hwmon/w83792d.c
> index abd5c3a722b9..4bfebdab1c60 100644
> --- a/drivers/hwmon/w83792d.c
> +++ b/drivers/hwmon/w83792d.c
> @@ -261,7 +261,7 @@ struct w83792d_data {
>  	struct device *hwmon_dev;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* array of 2 pointers to subclients */
> @@ -743,7 +743,7 @@ intrusion0_alarm_store(struct device *dev, struct device_attribute *attr,
>  	mutex_lock(&data->update_lock);
>  	reg = w83792d_read_value(client, W83792D_REG_CHASSIS_CLR);
>  	w83792d_write_value(client, W83792D_REG_CHASSIS_CLR, reg | 0x80);
> -	data->valid = 0;		/* Force cache refresh */
> +	data->valid = false;		/* Force cache refresh */
>  	mutex_unlock(&data->update_lock);
>  
>  	return count;
> @@ -1595,7 +1595,7 @@ static struct w83792d_data *w83792d_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
> index e7d0484eabe4..81221702951a 100644
> --- a/drivers/hwmon/w83793.c
> +++ b/drivers/hwmon/w83793.c
> @@ -205,7 +205,7 @@ struct w83793_data {
>  	struct i2c_client *lm75[2];
>  	struct device *hwmon_dev;
>  	struct mutex update_lock;
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned long last_nonvolatile;	/* In jiffies, last time we update the
>  					 * nonvolatile registers
> @@ -453,7 +453,7 @@ store_chassis_clear(struct device *dev,
>  	mutex_lock(&data->update_lock);
>  	reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
>  	w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
> -	data->valid = 0;		/* Force cache refresh */
> +	data->valid = false;		/* Force cache refresh */
>  	mutex_unlock(&data->update_lock);
>  	return count;
>  }
> @@ -2081,7 +2081,7 @@ static struct w83793_data *w83793_update_device(struct device *dev)
>  		data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
>  	w83793_update_nonvolatile(dev);
>  	data->last_updated = jiffies;
> -	data->valid = 1;
> +	data->valid = true;
>  
>  END:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c
> index 621b05afa837..45b12c4287df 100644
> --- a/drivers/hwmon/w83795.c
> +++ b/drivers/hwmon/w83795.c
> @@ -379,7 +379,7 @@ struct w83795_data {
>  	u8 enable_beep;
>  	u8 beeps[6];		/* Register value */
>  
> -	char valid;
> +	bool valid;
>  	char valid_limits;
>  	char valid_pwm_config;
>  };
> @@ -684,7 +684,7 @@ static struct w83795_data *w83795_update_device(struct device *dev)
>  			     tmp & ~ALARM_CTRL_RTSACS);
>  
>  	data->last_updated = jiffies;
> -	data->valid = 1;
> +	data->valid = true;
>  
>  END:
>  	mutex_unlock(&data->update_lock);
> @@ -764,7 +764,7 @@ store_chassis_clear(struct device *dev,
>  
>  	/* Clear status and force cache refresh */
>  	w83795_read(client, W83795_REG_ALARM(5));
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  	return count;
>  }
> diff --git a/drivers/hwmon/w83l785ts.c b/drivers/hwmon/w83l785ts.c
> index 656a77102ca6..a41f989d66e2 100644
> --- a/drivers/hwmon/w83l785ts.c
> +++ b/drivers/hwmon/w83l785ts.c
> @@ -98,7 +98,7 @@ static struct i2c_driver w83l785ts_driver = {
>  struct w83l785ts_data {
>  	struct device *hwmon_dev;
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* registers values */
> @@ -270,7 +270,7 @@ static struct w83l785ts_data *w83l785ts_update_device(struct device *dev)
>  				W83L785TS_REG_TEMP_OVER, data->temp[1]);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83l786ng.c b/drivers/hwmon/w83l786ng.c
> index 542afff1423b..11ba23c1af85 100644
> --- a/drivers/hwmon/w83l786ng.c
> +++ b/drivers/hwmon/w83l786ng.c
> @@ -113,7 +113,7 @@ DIV_TO_REG(long val)
>  struct w83l786ng_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned long last_nonvolatile;	/* In jiffies, last time we update the
>  					 * nonvolatile registers */
> @@ -209,7 +209,7 @@ static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
>  		data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  
>  	}
>  
> -- 
> 2.17.1
> 

Re: [PATCH] hwmon: cleanup non-bool "valid" data fields

[Guenter Roeck]

On Fri, Sep 24, 2021 at 10:52:02PM +0300, Paul Fertser wrote:
> We have bool so use it consistently in all the drivers.
> 
> The following Coccinelle script was used:
> 
> @@
> identifier T;
> type t = { char, int };
> @@
> struct T {
> ...
> -	t valid;
> +	bool valid;
> ...
> }
> 
> @@
> identifier v;
> @@
> (
> - v->valid = 0
> + v->valid = false
> |
> - v->valid = 1
> + v->valid = true
> )
> 
> followed by sed to fixup the comments:
> sed '/bool valid;/{s/!=0/true/;s/zero/false/}'
> 
> Few whitespace changes were fixed manually. All modified drivers were
> compile-tested.
> 
> Signed-off-by: Paul Fertser <fercerpav@gmail.com>

Applied.

Thanks,
Guenter

> ---
> 
> This was generated against hwmon-next branch.
> 
>  drivers/hwmon/abituguru3.c  |  6 +++---
>  drivers/hwmon/ad7414.c      |  4 ++--
>  drivers/hwmon/ad7418.c      |  6 +++---
>  drivers/hwmon/adm1021.c     |  4 ++--
>  drivers/hwmon/adm1025.c     |  4 ++--
>  drivers/hwmon/adm1026.c     |  4 ++--
>  drivers/hwmon/adm1029.c     |  4 ++--
>  drivers/hwmon/adm1031.c     |  6 +++---
>  drivers/hwmon/amc6821.c     |  8 ++++----
>  drivers/hwmon/applesmc.c    |  2 +-
>  drivers/hwmon/asb100.c      |  4 ++--
>  drivers/hwmon/asc7621.c     |  4 ++--
>  drivers/hwmon/atxp1.c       |  8 ++++----
>  drivers/hwmon/coretemp.c    |  2 +-
>  drivers/hwmon/dme1737.c     |  4 ++--
>  drivers/hwmon/ds1621.c      |  4 ++--
>  drivers/hwmon/ds620.c       |  4 ++--
>  drivers/hwmon/emc6w201.c    |  4 ++--
>  drivers/hwmon/f71805f.c     |  4 ++--
>  drivers/hwmon/f71882fg.c    |  4 ++--
>  drivers/hwmon/f75375s.c     |  4 ++--
>  drivers/hwmon/fschmd.c      |  4 ++--
>  drivers/hwmon/g760a.c       |  2 +-
>  drivers/hwmon/gl518sm.c     |  4 ++--
>  drivers/hwmon/gl520sm.c     |  4 ++--
>  drivers/hwmon/ibmaem.c      |  2 +-
>  drivers/hwmon/ibmpex.c      |  4 ++--
>  drivers/hwmon/it87.c        | 12 ++++++------
>  drivers/hwmon/lineage-pem.c |  2 +-
>  drivers/hwmon/lm63.c        |  6 +++---
>  drivers/hwmon/lm77.c        |  4 ++--
>  drivers/hwmon/lm78.c        |  4 ++--
>  drivers/hwmon/lm80.c        |  6 +++---
>  drivers/hwmon/lm83.c        |  4 ++--
>  drivers/hwmon/lm85.c        |  4 ++--
>  drivers/hwmon/lm87.c        |  4 ++--
>  drivers/hwmon/lm92.c        |  4 ++--
>  drivers/hwmon/lm93.c        |  4 ++--
>  drivers/hwmon/lm95241.c     |  8 ++++----
>  drivers/hwmon/ltc4151.c     |  2 +-
>  drivers/hwmon/ltc4215.c     |  2 +-
>  drivers/hwmon/ltc4261.c     |  4 ++--
>  drivers/hwmon/max16065.c    |  2 +-
>  drivers/hwmon/max1619.c     |  4 ++--
>  drivers/hwmon/max1668.c     |  4 ++--
>  drivers/hwmon/max6639.c     |  4 ++--
>  drivers/hwmon/max6642.c     |  2 +-
>  drivers/hwmon/pc87360.c     |  4 ++--
>  drivers/hwmon/sch5636.c     |  4 ++--
>  drivers/hwmon/sht21.c       |  4 ++--
>  drivers/hwmon/sis5595.c     |  4 ++--
>  drivers/hwmon/smm665.c      |  2 +-
>  drivers/hwmon/smsc47b397.c  |  4 ++--
>  drivers/hwmon/smsc47m192.c  |  4 ++--
>  drivers/hwmon/thmc50.c      |  4 ++--
>  drivers/hwmon/tmp401.c      |  6 +++---
>  drivers/hwmon/tmp421.c      |  6 +++---
>  drivers/hwmon/via686a.c     |  4 ++--
>  drivers/hwmon/vt1211.c      |  4 ++--
>  drivers/hwmon/vt8231.c      |  4 ++--
>  drivers/hwmon/w83627ehf.c   |  8 ++++----
>  drivers/hwmon/w83627hf.c    |  6 +++---
>  drivers/hwmon/w83781d.c     |  4 ++--
>  drivers/hwmon/w83791d.c     |  4 ++--
>  drivers/hwmon/w83792d.c     |  6 +++---
>  drivers/hwmon/w83793.c      |  6 +++---
>  drivers/hwmon/w83795.c      |  6 +++---
>  drivers/hwmon/w83l785ts.c   |  4 ++--
>  drivers/hwmon/w83l786ng.c   |  4 ++--
>  69 files changed, 151 insertions(+), 151 deletions(-)
> 
> diff --git a/drivers/hwmon/abituguru3.c b/drivers/hwmon/abituguru3.c
> index 112dd0d9377c..8229ad30c909 100644
> --- a/drivers/hwmon/abituguru3.c
> +++ b/drivers/hwmon/abituguru3.c
> @@ -145,7 +145,7 @@ struct abituguru3_data {
>  	struct device *hwmon_dev;	/* hwmon registered device */
>  	struct mutex update_lock;	/* protect access to data and uGuru */
>  	unsigned short addr;		/* uguru base address */
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/*
> @@ -1083,7 +1083,7 @@ static struct abituguru3_data *abituguru3_update_device(struct device *dev)
>  	mutex_lock(&data->update_lock);
>  	if (!data->valid || time_after(jiffies, data->last_updated + HZ)) {
>  		/* Clear data->valid while updating */
> -		data->valid = 0;
> +		data->valid = false;
>  		/* Read alarms */
>  		if (abituguru3_read_increment_offset(data,
>  				ABIT_UGURU3_SETTINGS_BANK,
> @@ -1117,7 +1117,7 @@ static struct abituguru3_data *abituguru3_update_device(struct device *dev)
>  				goto LEAVE_UPDATE;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  LEAVE_UPDATE:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ad7414.c b/drivers/hwmon/ad7414.c
> index 6a765755d061..0afb89c4629d 100644
> --- a/drivers/hwmon/ad7414.c
> +++ b/drivers/hwmon/ad7414.c
> @@ -37,7 +37,7 @@ static u8 AD7414_REG_LIMIT[] = { AD7414_REG_T_HIGH, AD7414_REG_T_LOW };
>  struct ad7414_data {
>  	struct i2c_client	*client;
>  	struct mutex		lock;	/* atomic read data updates */
> -	char			valid;	/* !=0 if following fields are valid */
> +	bool			valid;	/* true if following fields are valid */
>  	unsigned long		next_update;	/* In jiffies */
>  	s16			temp_input;	/* Register values */
>  	s8			temps[ARRAY_SIZE(AD7414_REG_LIMIT)];
> @@ -95,7 +95,7 @@ static struct ad7414_data *ad7414_update_device(struct device *dev)
>  		}
>  
>  		data->next_update = jiffies + HZ + HZ / 2;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->lock);
> diff --git a/drivers/hwmon/ad7418.c b/drivers/hwmon/ad7418.c
> index d618f6b2f382..22bdb7e5b9e0 100644
> --- a/drivers/hwmon/ad7418.c
> +++ b/drivers/hwmon/ad7418.c
> @@ -46,7 +46,7 @@ struct ad7418_data {
>  	enum chips		type;
>  	struct mutex		lock;
>  	int			adc_max;	/* number of ADC channels */
> -	char			valid;
> +	bool			valid;
>  	unsigned long		last_updated;	/* In jiffies */
>  	s16			temp[3];	/* Register values */
>  	u16			in[4];
> @@ -111,14 +111,14 @@ static int ad7418_update_device(struct device *dev)
>  			goto abort;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->lock);
>  	return 0;
>  
>  abort:
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->lock);
>  	return val;
>  }
> diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
> index 71deb2cd20f5..38b447c6e8cd 100644
> --- a/drivers/hwmon/adm1021.c
> +++ b/drivers/hwmon/adm1021.c
> @@ -72,7 +72,7 @@ struct adm1021_data {
>  	const struct attribute_group *groups[3];
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	char low_power;		/* !=0 if device in low power mode */
>  	unsigned long last_updated;	/* In jiffies */
>  
> @@ -135,7 +135,7 @@ static struct adm1021_data *adm1021_update_device(struct device *dev)
>  						ADM1023_REG_REM_OFFSET_PREC);
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/adm1025.c b/drivers/hwmon/adm1025.c
> index de51e01c061b..4352f6a884e8 100644
> --- a/drivers/hwmon/adm1025.c
> +++ b/drivers/hwmon/adm1025.c
> @@ -97,7 +97,7 @@ struct adm1025_data {
>  	struct i2c_client *client;
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	u8 in[6];		/* register value */
> @@ -148,7 +148,7 @@ static struct adm1025_data *adm1025_update_device(struct device *dev)
>  			      ADM1025_REG_VID4) & 0x01) << 4);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/adm1026.c b/drivers/hwmon/adm1026.c
> index 49cefbadb156..69b3ec752944 100644
> --- a/drivers/hwmon/adm1026.c
> +++ b/drivers/hwmon/adm1026.c
> @@ -259,7 +259,7 @@ struct adm1026_data {
>  	const struct attribute_group *groups[3];
>  
>  	struct mutex update_lock;
> -	int valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_reading;	/* In jiffies */
>  	unsigned long last_config;	/* In jiffies */
>  
> @@ -459,7 +459,7 @@ static struct adm1026_data *adm1026_update_device(struct device *dev)
>  		data->last_config = jiffies;
>  	}	/* last_config */
>  
> -	data->valid = 1;
> +	data->valid = true;
>  	mutex_unlock(&data->update_lock);
>  	return data;
>  }
> diff --git a/drivers/hwmon/adm1029.c b/drivers/hwmon/adm1029.c
> index 50b1df7b008c..3e1999413f32 100644
> --- a/drivers/hwmon/adm1029.c
> +++ b/drivers/hwmon/adm1029.c
> @@ -99,7 +99,7 @@ static const u8 ADM1029_REG_FAN_DIV[] = {
>  struct adm1029_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock; /* protect register access */
> -	char valid;		/* zero until following fields are valid */
> +	bool valid;		/* false until following fields are valid */
>  	unsigned long last_updated;	/* in jiffies */
>  
>  	/* registers values, signed for temperature, unsigned for other stuff */
> @@ -143,7 +143,7 @@ static struct adm1029_data *adm1029_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/adm1031.c b/drivers/hwmon/adm1031.c
> index b538ace2d292..257ec53ae723 100644
> --- a/drivers/hwmon/adm1031.c
> +++ b/drivers/hwmon/adm1031.c
> @@ -65,7 +65,7 @@ struct adm1031_data {
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
>  	int chip_type;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned int update_interval;	/* In milliseconds */
>  	/*
> @@ -187,7 +187,7 @@ static struct adm1031_data *adm1031_update_device(struct device *dev)
>  					ADM1031_REG_PWM) >> (4 * chan)) & 0x0f;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> @@ -650,7 +650,7 @@ static ssize_t fan_div_store(struct device *dev,
>  			    data->fan_min[nr]);
>  
>  	/* Invalidate the cache: fan speed is no longer valid */
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  	return count;
>  }
> diff --git a/drivers/hwmon/amc6821.c b/drivers/hwmon/amc6821.c
> index 6b1ce2242c61..0c16face3fd3 100644
> --- a/drivers/hwmon/amc6821.c
> +++ b/drivers/hwmon/amc6821.c
> @@ -141,7 +141,7 @@ static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI,
>  struct amc6821_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* register values */
> @@ -258,7 +258,7 @@ static struct amc6821_data *amc6821_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  	mutex_unlock(&data->update_lock);
>  	return data;
> @@ -511,7 +511,7 @@ static ssize_t temp_auto_point_temp_store(struct device *dev,
>  	}
>  
>  	mutex_lock(&data->update_lock);
> -	data->valid = 0;
> +	data->valid = false;
>  
>  	switch (ix) {
>  	case 0:
> @@ -584,7 +584,7 @@ static ssize_t pwm1_auto_point_pwm_store(struct device *dev,
>  	}
>  
>  EXIT:
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  	return count;
>  }
> diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
> index c31759794a29..fc6d6a9053ce 100644
> --- a/drivers/hwmon/applesmc.c
> +++ b/drivers/hwmon/applesmc.c
> @@ -391,7 +391,7 @@ static const struct applesmc_entry *applesmc_get_entry_by_index(int index)
>  	cache->len = info[0];
>  	memcpy(cache->type, &info[1], 4);
>  	cache->flags = info[5];
> -	cache->valid = 1;
> +	cache->valid = true;
>  
>  out:
>  	mutex_unlock(&smcreg.mutex);
> diff --git a/drivers/hwmon/asb100.c b/drivers/hwmon/asb100.c
> index ba9fcf6f9264..8cf0bcb85eb4 100644
> --- a/drivers/hwmon/asb100.c
> +++ b/drivers/hwmon/asb100.c
> @@ -186,7 +186,7 @@ struct asb100_data {
>  	/* array of 2 pointers to subclients */
>  	struct i2c_client *lm75[2];
>  
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	u8 in[7];		/* Register value */
>  	u8 in_max[7];		/* Register value */
>  	u8 in_min[7];		/* Register value */
> @@ -993,7 +993,7 @@ static struct asb100_data *asb100_update_device(struct device *dev)
>  			(asb100_read_value(client, ASB100_REG_ALARM2) << 8);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  
>  		dev_dbg(&client->dev, "... device update complete\n");
>  	}
> diff --git a/drivers/hwmon/asc7621.c b/drivers/hwmon/asc7621.c
> index 600ffc7e1900..e835605a7456 100644
> --- a/drivers/hwmon/asc7621.c
> +++ b/drivers/hwmon/asc7621.c
> @@ -77,7 +77,7 @@ struct asc7621_data {
>  	struct i2c_client client;
>  	struct device *class_dev;
>  	struct mutex update_lock;
> -	int valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_high_reading;	/* In jiffies */
>  	unsigned long last_low_reading;		/* In jiffies */
>  	/*
> @@ -1032,7 +1032,7 @@ static struct asc7621_data *asc7621_update_device(struct device *dev)
>  		data->last_low_reading = jiffies;
>  	}			/* last_reading */
>  
> -	data->valid = 1;
> +	data->valid = true;
>  
>  	mutex_unlock(&data->update_lock);
>  
> diff --git a/drivers/hwmon/atxp1.c b/drivers/hwmon/atxp1.c
> index 1e08a5431f12..24e7da68c064 100644
> --- a/drivers/hwmon/atxp1.c
> +++ b/drivers/hwmon/atxp1.c
> @@ -63,7 +63,7 @@ static struct atxp1_data *atxp1_update_device(struct device *dev)
>  		data->reg.gpio1 = i2c_smbus_read_byte_data(client, ATXP1_GPIO1);
>  		data->reg.gpio2 = i2c_smbus_read_byte_data(client, ATXP1_GPIO2);
>  
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> @@ -136,7 +136,7 @@ static ssize_t cpu0_vid_store(struct device *dev,
>  						ATXP1_VID, cvid | ATXP1_VIDENA);
>  	}
>  
> -	data->valid = 0;
> +	data->valid = false;
>  
>  	return count;
>  }
> @@ -180,7 +180,7 @@ static ssize_t gpio1_store(struct device *dev, struct device_attribute *attr,
>  
>  		i2c_smbus_write_byte_data(client, ATXP1_GPIO1, value);
>  
> -		data->valid = 0;
> +		data->valid = false;
>  	}
>  
>  	return count;
> @@ -224,7 +224,7 @@ static ssize_t gpio2_store(struct device *dev, struct device_attribute *attr,
>  
>  		i2c_smbus_write_byte_data(client, ATXP1_GPIO2, value);
>  
> -		data->valid = 0;
> +		data->valid = false;
>  	}
>  
>  	return count;
> diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
> index bb9211215a68..ccf0af5b988a 100644
> --- a/drivers/hwmon/coretemp.c
> +++ b/drivers/hwmon/coretemp.c
> @@ -167,7 +167,7 @@ static ssize_t show_temp(struct device *dev,
>  		 * really help at all.
>  		 */
>  		tdata->temp = tdata->tjmax - ((eax >> 16) & 0x7f) * 1000;
> -		tdata->valid = 1;
> +		tdata->valid = true;
>  		tdata->last_updated = jiffies;
>  	}
>  
> diff --git a/drivers/hwmon/dme1737.c b/drivers/hwmon/dme1737.c
> index c1e4cfb40c3d..e3ad4c2d0038 100644
> --- a/drivers/hwmon/dme1737.c
> +++ b/drivers/hwmon/dme1737.c
> @@ -203,7 +203,7 @@ struct dme1737_data {
>  	unsigned int addr;		/* for ISA devices only */
>  
>  	struct mutex update_lock;
> -	int valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_update;	/* in jiffies */
>  	unsigned long last_vbat;	/* in jiffies */
>  	enum chips type;
> @@ -778,7 +778,7 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
>  		}
>  
>  		data->last_update = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
> index bf1c4b7ecb40..0886abf6ebab 100644
> --- a/drivers/hwmon/ds1621.c
> +++ b/drivers/hwmon/ds1621.c
> @@ -109,7 +109,7 @@ static const u8 DS1621_REG_TEMP[3] = {
>  struct ds1621_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	enum chips kind;		/* device type */
>  
> @@ -213,7 +213,7 @@ static struct ds1621_data *ds1621_update_client(struct device *dev)
>  						  new_conf);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ds620.c b/drivers/hwmon/ds620.c
> index 9ec722798c4a..82d7c3d58f49 100644
> --- a/drivers/hwmon/ds620.c
> +++ b/drivers/hwmon/ds620.c
> @@ -56,7 +56,7 @@ static const u8 DS620_REG_TEMP[3] = {
>  struct ds620_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	s16 temp[3];		/* Register values, word */
> @@ -118,7 +118,7 @@ static struct ds620_data *ds620_update_client(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/emc6w201.c b/drivers/hwmon/emc6w201.c
> index ec5c98702bf5..29082c8463f4 100644
> --- a/drivers/hwmon/emc6w201.c
> +++ b/drivers/hwmon/emc6w201.c
> @@ -45,7 +45,7 @@ enum subfeature { input, min, max };
>  struct emc6w201_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* registers values */
> @@ -162,7 +162,7 @@ static struct emc6w201_data *emc6w201_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/f71805f.c b/drivers/hwmon/f71805f.c
> index 67b47de8263a..7f20edb0677c 100644
> --- a/drivers/hwmon/f71805f.c
> +++ b/drivers/hwmon/f71805f.c
> @@ -165,7 +165,7 @@ struct f71805f_data {
>  	struct device *hwmon_dev;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned long last_limits;	/* In jiffies */
>  
> @@ -404,7 +404,7 @@ static struct f71805f_data *f71805f_update_device(struct device *dev)
>  			+ (f71805f_read8(data, F71805F_REG_STATUS(2)) << 16);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c
> index 4dec793fd07d..4673d403759a 100644
> --- a/drivers/hwmon/f71882fg.c
> +++ b/drivers/hwmon/f71882fg.c
> @@ -253,7 +253,7 @@ struct f71882fg_data {
>  
>  	struct mutex update_lock;
>  	int temp_start;			/* temp numbering start (0 or 1) */
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	char auto_point_temp_signed;
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned long last_limits;	/* In jiffies */
> @@ -1359,7 +1359,7 @@ static struct f71882fg_data *f71882fg_update_device(struct device *dev)
>  							F71882FG_REG_IN(nr));
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
> index 3e567be60fb1..57c8a473698d 100644
> --- a/drivers/hwmon/f75375s.c
> +++ b/drivers/hwmon/f75375s.c
> @@ -85,7 +85,7 @@ struct f75375_data {
>  	const char *name;
>  	int kind;
>  	struct mutex update_lock; /* protect register access */
> -	char valid;
> +	bool valid;
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned long last_limits;	/* In jiffies */
>  
> @@ -228,7 +228,7 @@ static struct f75375_data *f75375_update_device(struct device *dev)
>  				f75375_read8(client, F75375_REG_VOLT(nr));
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/fschmd.c b/drivers/hwmon/fschmd.c
> index 5191cd85a8d1..c26195e3aad7 100644
> --- a/drivers/hwmon/fschmd.c
> +++ b/drivers/hwmon/fschmd.c
> @@ -264,7 +264,7 @@ struct fschmd_data {
>  	unsigned long watchdog_is_open;
>  	char watchdog_expect_close;
>  	char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* register values */
> @@ -1356,7 +1356,7 @@ static struct fschmd_data *fschmd_update_device(struct device *dev)
>  					       FSCHMD_REG_VOLT[data->kind][i]);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/g760a.c b/drivers/hwmon/g760a.c
> index a692f7b2f6f7..36717b524dbd 100644
> --- a/drivers/hwmon/g760a.c
> +++ b/drivers/hwmon/g760a.c
> @@ -95,7 +95,7 @@ static struct g760a_data *g760a_update_client(struct device *dev)
>  		data->fan_sta = g760a_read_value(client, G760A_REG_FAN_STA);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/gl518sm.c b/drivers/hwmon/gl518sm.c
> index 7aaee5a48243..dd683b0a648f 100644
> --- a/drivers/hwmon/gl518sm.c
> +++ b/drivers/hwmon/gl518sm.c
> @@ -107,7 +107,7 @@ struct gl518_data {
>  	enum chips type;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 voltage_in[4];	/* Register values; [0] = VDD */
> @@ -211,7 +211,7 @@ static struct gl518_data *gl518_update_device(struct device *dev)
>  		    gl518_read_value(client, GL518_REG_VIN3);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/gl520sm.c b/drivers/hwmon/gl520sm.c
> index 4ae1295cc3ea..096ba9797211 100644
> --- a/drivers/hwmon/gl520sm.c
> +++ b/drivers/hwmon/gl520sm.c
> @@ -64,7 +64,7 @@ struct gl520_data {
>  	struct i2c_client *client;
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
> -	char valid;		/* zero until the following fields are valid */
> +	bool valid;		/* false until the following fields are valid */
>  	unsigned long last_updated;	/* in jiffies */
>  
>  	u8 vid;
> @@ -174,7 +174,7 @@ static struct gl520_data *gl520_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c
> index a4ec85207782..de6baf6ca3d1 100644
> --- a/drivers/hwmon/ibmaem.c
> +++ b/drivers/hwmon/ibmaem.c
> @@ -127,7 +127,7 @@ struct aem_data {
>  	struct device		*hwmon_dev;
>  	struct platform_device	*pdev;
>  	struct mutex		lock;
> -	char			valid;
> +	bool			valid;
>  	unsigned long		last_updated;	/* In jiffies */
>  	u8			ver_major;
>  	u8			ver_minor;
> diff --git a/drivers/hwmon/ibmpex.c b/drivers/hwmon/ibmpex.c
> index b2ab83c9fd9a..f6ec165c0fa8 100644
> --- a/drivers/hwmon/ibmpex.c
> +++ b/drivers/hwmon/ibmpex.c
> @@ -66,7 +66,7 @@ struct ibmpex_bmc_data {
>  	struct device		*hwmon_dev;
>  	struct device		*bmc_device;
>  	struct mutex		lock;
> -	char			valid;
> +	bool			valid;
>  	unsigned long		last_updated;	/* In jiffies */
>  
>  	struct ipmi_addr	address;
> @@ -239,7 +239,7 @@ static void ibmpex_update_device(struct ibmpex_bmc_data *data)
>  	}
>  
>  	data->last_updated = jiffies;
> -	data->valid = 1;
> +	data->valid = true;
>  
>  out:
>  	mutex_unlock(&data->lock);
> diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
> index 1f93134afcb9..0e543dbe0a6b 100644
> --- a/drivers/hwmon/it87.c
> +++ b/drivers/hwmon/it87.c
> @@ -519,7 +519,7 @@ struct it87_data {
>  	unsigned short addr;
>  	const char *name;
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u16 in_scaled;		/* Internal voltage sensors are scaled */
> @@ -844,7 +844,7 @@ static struct it87_data *it87_update_device(struct device *dev)
>  			data->vid &= 0x3f;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> @@ -980,7 +980,7 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
>  			regval |= 0x80;
>  			it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
>  		}
> -		data->valid = 0;
> +		data->valid = false;
>  		reg = IT87_REG_TEMP_OFFSET[nr];
>  		break;
>  	}
> @@ -1079,7 +1079,7 @@ static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
>  	it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
>  	if (has_temp_old_peci(data, nr))
>  		it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
> -	data->valid = 0;	/* Force cache refresh */
> +	data->valid = false;	/* Force cache refresh */
>  	mutex_unlock(&data->update_lock);
>  	return count;
>  }
> @@ -1834,7 +1834,7 @@ static ssize_t clear_intrusion(struct device *dev,
>  		config |= BIT(5);
>  		it87_write_value(data, IT87_REG_CONFIG, config);
>  		/* Invalidate cache to force re-read */
> -		data->valid = 0;
> +		data->valid = false;
>  	}
>  	mutex_unlock(&data->update_lock);
>  
> @@ -3229,7 +3229,7 @@ static int __maybe_unused it87_resume(struct device *dev)
>  	it87_start_monitoring(data);
>  
>  	/* force update */
> -	data->valid = 0;
> +	data->valid = false;
>  
>  	mutex_unlock(&data->update_lock);
>  
> diff --git a/drivers/hwmon/lineage-pem.c b/drivers/hwmon/lineage-pem.c
> index 1109fffa76fb..ef5a49cd9149 100644
> --- a/drivers/hwmon/lineage-pem.c
> +++ b/drivers/hwmon/lineage-pem.c
> @@ -191,7 +191,7 @@ static struct pem_data *pem_update_device(struct device *dev)
>  		i2c_smbus_write_byte(client, PEM_CLEAR_INFO_FLAGS);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c
> index c8f93c5d1ccc..339a145afc09 100644
> --- a/drivers/hwmon/lm63.c
> +++ b/drivers/hwmon/lm63.c
> @@ -139,7 +139,7 @@ struct lm63_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
>  	const struct attribute_group *groups[5];
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	char lut_valid; /* zero until lut fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  	unsigned long lut_last_updated; /* in jiffies */
> @@ -289,7 +289,7 @@ static struct lm63_data *lm63_update_device(struct device *dev)
>  			       LM63_REG_ALERT_STATUS) & 0x7F;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	lm63_update_lut(data);
> @@ -714,7 +714,7 @@ static ssize_t temp2_type_store(struct device *dev,
>  	reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
>  	i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
>  				  reg | (data->trutherm ? 0x02 : 0x00));
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  
>  	return count;
> diff --git a/drivers/hwmon/lm77.c b/drivers/hwmon/lm77.c
> index 7570c9d50ddc..df6af85e170a 100644
> --- a/drivers/hwmon/lm77.c
> +++ b/drivers/hwmon/lm77.c
> @@ -55,7 +55,7 @@ static const u8 temp_regs[t_num_temp] = {
>  struct lm77_data {
>  	struct i2c_client	*client;
>  	struct mutex		update_lock;
> -	char			valid;
> +	bool			valid;
>  	unsigned long		last_updated;	/* In jiffies */
>  	int			temp[t_num_temp]; /* index using temp_index */
>  	u8			alarms;
> @@ -118,7 +118,7 @@ static struct lm77_data *lm77_update_device(struct device *dev)
>  		data->alarms =
>  			lm77_read_value(client, LM77_REG_TEMP) & 0x0007;
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm78.c b/drivers/hwmon/lm78.c
> index 1aa35ca0c6fe..5e129cbec1cb 100644
> --- a/drivers/hwmon/lm78.c
> +++ b/drivers/hwmon/lm78.c
> @@ -117,7 +117,7 @@ struct lm78_data {
>  	int isa_addr;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[7];		/* Register value */
> @@ -772,7 +772,7 @@ static struct lm78_data *lm78_update_device(struct device *dev)
>  		data->alarms = lm78_read_value(data, LM78_REG_ALARM1) +
>  		    (lm78_read_value(data, LM78_REG_ALARM2) << 8);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  
>  		data->fan_div[2] = 1;
>  	}
> diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
> index 97ab491d2922..e85e062bbf32 100644
> --- a/drivers/hwmon/lm80.c
> +++ b/drivers/hwmon/lm80.c
> @@ -117,7 +117,7 @@ struct lm80_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
>  	char error;		/* !=0 if error occurred during last update */
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[i_num_in][7];	/* Register value, 1st index is enum in_index */
> @@ -236,14 +236,14 @@ static struct lm80_data *lm80_update_device(struct device *dev)
>  		data->alarms = prev_rv + (rv << 8);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  		data->error = 0;
>  	}
>  	goto done;
>  
>  abort:
>  	ret = ERR_PTR(rv);
> -	data->valid = 0;
> +	data->valid = false;
>  	data->error = 1;
>  
>  done:
> diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c
> index 2ff5ecce608e..74fd7aa373a3 100644
> --- a/drivers/hwmon/lm83.c
> +++ b/drivers/hwmon/lm83.c
> @@ -105,7 +105,7 @@ struct lm83_data {
>  	struct i2c_client *client;
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* registers values */
> @@ -137,7 +137,7 @@ static struct lm83_data *lm83_update_device(struct device *dev)
>  		    << 8);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm85.c b/drivers/hwmon/lm85.c
> index c7bf5de7b70f..88cf2012d34b 100644
> --- a/drivers/hwmon/lm85.c
> +++ b/drivers/hwmon/lm85.c
> @@ -294,7 +294,7 @@ struct lm85_data {
>  	bool has_vid5;	/* true if VID5 is configured for ADT7463 or ADT7468 */
>  
>  	struct mutex update_lock;
> -	int valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_reading;	/* In jiffies */
>  	unsigned long last_config;	/* In jiffies */
>  
> @@ -541,7 +541,7 @@ static struct lm85_data *lm85_update_device(struct device *dev)
>  		data->last_config = jiffies;
>  	}  /* last_config */
>  
> -	data->valid = 1;
> +	data->valid = true;
>  
>  	mutex_unlock(&data->update_lock);
>  
> diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c
> index b2d820125bb6..1750bc588856 100644
> --- a/drivers/hwmon/lm87.c
> +++ b/drivers/hwmon/lm87.c
> @@ -141,7 +141,7 @@ static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
>  
>  struct lm87_data {
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* In jiffies */
>  
>  	u8 channel;		/* register value */
> @@ -251,7 +251,7 @@ static struct lm87_data *lm87_update_device(struct device *dev)
>  		data->aout = lm87_read_value(client, LM87_REG_AOUT);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm92.c b/drivers/hwmon/lm92.c
> index 9bf278cf0bd0..5bae6eedcaf1 100644
> --- a/drivers/hwmon/lm92.c
> +++ b/drivers/hwmon/lm92.c
> @@ -99,7 +99,7 @@ static const u8 regs[t_num_regs] = {
>  struct lm92_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* registers values */
> @@ -126,7 +126,7 @@ static struct lm92_data *lm92_update_device(struct device *dev)
>  				i2c_smbus_read_word_swapped(client, regs[i]);
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm93.c b/drivers/hwmon/lm93.c
> index 78d6dfaf145b..dc67bf954b21 100644
> --- a/drivers/hwmon/lm93.c
> +++ b/drivers/hwmon/lm93.c
> @@ -202,7 +202,7 @@ struct lm93_data {
>  	/* client update function */
>  	void (*update)(struct lm93_data *, struct i2c_client *);
>  
> -	char valid; /* !=0 if following fields are valid */
> +	bool valid; /* true if following fields are valid */
>  
>  	/* register values, arranged by block read groups */
>  	struct block1_t block1;
> @@ -917,7 +917,7 @@ static struct lm93_data *lm93_update_device(struct device *dev)
>  
>  		data->update(data, client);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/lm95241.c b/drivers/hwmon/lm95241.c
> index 00dbc170c8c6..8ea46ff20be5 100644
> --- a/drivers/hwmon/lm95241.c
> +++ b/drivers/hwmon/lm95241.c
> @@ -78,7 +78,7 @@ struct lm95241_data {
>  	struct mutex update_lock;
>  	unsigned long last_updated;	/* in jiffies */
>  	unsigned long interval;		/* in milli-seconds */
> -	char valid;		/* zero until following fields are valid */
> +	bool valid;		/* false until following fields are valid */
>  	/* registers values */
>  	u8 temp[ARRAY_SIZE(lm95241_reg_address)];
>  	u8 status, config, model, trutherm;
> @@ -118,7 +118,7 @@ static struct lm95241_data *lm95241_update_device(struct device *dev)
>  		data->status = i2c_smbus_read_byte_data(client,
>  							LM95241_REG_R_STATUS);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> @@ -257,7 +257,7 @@ static int lm95241_write_temp(struct device *dev, u32 attr, int channel,
>  			else
>  				data->config &= ~R2DF_MASK;
>  		}
> -		data->valid = 0;
> +		data->valid = false;
>  		ret = i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG,
>  						data->config);
>  		break;
> @@ -273,7 +273,7 @@ static int lm95241_write_temp(struct device *dev, u32 attr, int channel,
>  			else
>  				data->config &= ~R2DF_MASK;
>  		}
> -		data->valid = 0;
> +		data->valid = false;
>  		ret = i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG,
>  						data->config);
>  		break;
> diff --git a/drivers/hwmon/ltc4151.c b/drivers/hwmon/ltc4151.c
> index 13b85367a21f..e3ac004c1ed1 100644
> --- a/drivers/hwmon/ltc4151.c
> +++ b/drivers/hwmon/ltc4151.c
> @@ -77,7 +77,7 @@ static struct ltc4151_data *ltc4151_update_device(struct device *dev)
>  			data->regs[i] = val;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ltc4215.c b/drivers/hwmon/ltc4215.c
> index 1d18c212054f..fa43d26ddd4f 100644
> --- a/drivers/hwmon/ltc4215.c
> +++ b/drivers/hwmon/ltc4215.c
> @@ -64,7 +64,7 @@ static struct ltc4215_data *ltc4215_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/ltc4261.c b/drivers/hwmon/ltc4261.c
> index b81e9c3d297b..b91cc4fe84e5 100644
> --- a/drivers/hwmon/ltc4261.c
> +++ b/drivers/hwmon/ltc4261.c
> @@ -73,13 +73,13 @@ static struct ltc4261_data *ltc4261_update_device(struct device *dev)
>  					"Failed to read ADC value: error %d\n",
>  					val);
>  				ret = ERR_PTR(val);
> -				data->valid = 0;
> +				data->valid = false;
>  				goto abort;
>  			}
>  			data->regs[i] = val;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/max16065.c b/drivers/hwmon/max16065.c
> index ae3a6a7bdaa2..daa5d8af1e69 100644
> --- a/drivers/hwmon/max16065.c
> +++ b/drivers/hwmon/max16065.c
> @@ -166,7 +166,7 @@ static struct max16065_data *max16065_update_device(struct device *dev)
>  			  = i2c_smbus_read_byte_data(client, MAX16065_FAULT(i));
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  	mutex_unlock(&data->update_lock);
>  	return data;
> diff --git a/drivers/hwmon/max1619.c b/drivers/hwmon/max1619.c
> index 8bd941cae4d1..eae9e68027bc 100644
> --- a/drivers/hwmon/max1619.c
> +++ b/drivers/hwmon/max1619.c
> @@ -79,7 +79,7 @@ enum temp_index {
>  struct max1619_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* registers values */
> @@ -124,7 +124,7 @@ static struct max1619_data *max1619_update_device(struct device *dev)
>  			data->alarms ^= 0x02;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/max1668.c b/drivers/hwmon/max1668.c
> index 5c41c78f0458..78688e6cb87d 100644
> --- a/drivers/hwmon/max1668.c
> +++ b/drivers/hwmon/max1668.c
> @@ -58,7 +58,7 @@ struct max1668_data {
>  	enum chips type;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* 1x local and 4x remote */
> @@ -120,7 +120,7 @@ static struct max1668_data *max1668_update_device(struct device *dev)
>  	data->alarms |= val;
>  
>  	data->last_updated = jiffies;
> -	data->valid = 1;
> +	data->valid = true;
>  abort:
>  	mutex_unlock(&data->update_lock);
>  
> diff --git a/drivers/hwmon/max6639.c b/drivers/hwmon/max6639.c
> index b71899c641fa..ccc0f047bd44 100644
> --- a/drivers/hwmon/max6639.c
> +++ b/drivers/hwmon/max6639.c
> @@ -69,7 +69,7 @@ static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 };
>  struct max6639_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* Register values sampled regularly */
> @@ -141,7 +141,7 @@ static struct max6639_data *max6639_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/max6642.c b/drivers/hwmon/max6642.c
> index 23d93142b0b3..699d265aae2e 100644
> --- a/drivers/hwmon/max6642.c
> +++ b/drivers/hwmon/max6642.c
> @@ -181,7 +181,7 @@ static struct max6642_data *max6642_update_device(struct device *dev)
>  					MAX6642_REG_R_STATUS);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/pc87360.c b/drivers/hwmon/pc87360.c
> index 6a9ba23cd302..0828436a1f6c 100644
> --- a/drivers/hwmon/pc87360.c
> +++ b/drivers/hwmon/pc87360.c
> @@ -178,7 +178,7 @@ struct pc87360_data {
>  	struct device *hwmon_dev;
>  	struct mutex lock;
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	int address[3];
> @@ -1673,7 +1673,7 @@ static struct pc87360_data *pc87360_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/sch5636.c b/drivers/hwmon/sch5636.c
> index a5cd4de36575..39ff1c9b1df5 100644
> --- a/drivers/hwmon/sch5636.c
> +++ b/drivers/hwmon/sch5636.c
> @@ -56,7 +56,7 @@ struct sch5636_data {
>  	struct device *hwmon_dev;
>  
>  	struct mutex update_lock;
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	u8 in[SCH5636_NO_INS];
>  	u8 temp_val[SCH5636_NO_TEMPS];
> @@ -140,7 +140,7 @@ static struct sch5636_data *sch5636_update_device(struct device *dev)
>  	}
>  
>  	data->last_updated = jiffies;
> -	data->valid = 1;
> +	data->valid = true;
>  abort:
>  	mutex_unlock(&data->update_lock);
>  	return ret;
> diff --git a/drivers/hwmon/sht21.c b/drivers/hwmon/sht21.c
> index 7d18ce5d3839..e23dbf287233 100644
> --- a/drivers/hwmon/sht21.c
> +++ b/drivers/hwmon/sht21.c
> @@ -41,7 +41,7 @@ struct sht21 {
>  	unsigned long last_update;
>  	int temperature;
>  	int humidity;
> -	char valid;
> +	bool valid;
>  	char eic[18];
>  };
>  
> @@ -105,7 +105,7 @@ static int sht21_update_measurements(struct device *dev)
>  			goto out;
>  		sht21->humidity = sht21_rh_ticks_to_per_cent_mille(ret);
>  		sht21->last_update = jiffies;
> -		sht21->valid = 1;
> +		sht21->valid = true;
>  	}
>  out:
>  	mutex_unlock(&sht21->lock);
> diff --git a/drivers/hwmon/sis5595.c b/drivers/hwmon/sis5595.c
> index 0c6741f949f5..018cb5a7651f 100644
> --- a/drivers/hwmon/sis5595.c
> +++ b/drivers/hwmon/sis5595.c
> @@ -172,7 +172,7 @@ struct sis5595_data {
>  	struct mutex lock;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	char maxins;		/* == 3 if temp enabled, otherwise == 4 */
>  	u8 revision;		/* Reg. value */
> @@ -728,7 +728,7 @@ static struct sis5595_data *sis5595_update_device(struct device *dev)
>  		    sis5595_read_value(data, SIS5595_REG_ALARM1) |
>  		    (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/smm665.c b/drivers/hwmon/smm665.c
> index 62906d9c4b86..8c4ed72e5d68 100644
> --- a/drivers/hwmon/smm665.c
> +++ b/drivers/hwmon/smm665.c
> @@ -265,7 +265,7 @@ static struct smm665_data *smm665_update_device(struct device *dev)
>  			data->adc[i] = val;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/smsc47b397.c b/drivers/hwmon/smsc47b397.c
> index f928b8d4ff48..c26d6eae0e4e 100644
> --- a/drivers/hwmon/smsc47b397.c
> +++ b/drivers/hwmon/smsc47b397.c
> @@ -96,7 +96,7 @@ struct smsc47b397_data {
>  
>  	struct mutex update_lock;
>  	unsigned long last_updated; /* in jiffies */
> -	int valid;
> +	bool valid;
>  
>  	/* register values */
>  	u16 fan[4];
> @@ -137,7 +137,7 @@ static struct smsc47b397_data *smsc47b397_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  
>  		dev_dbg(dev, "... device update complete\n");
>  	}
> diff --git a/drivers/hwmon/smsc47m192.c b/drivers/hwmon/smsc47m192.c
> index 03a87aa2017a..a5db15c087ae 100644
> --- a/drivers/hwmon/smsc47m192.c
> +++ b/drivers/hwmon/smsc47m192.c
> @@ -86,7 +86,7 @@ struct smsc47m192_data {
>  	struct i2c_client *client;
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[8];		/* Register value */
> @@ -157,7 +157,7 @@ static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
>  						SMSC47M192_REG_ALARM2) << 8);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/thmc50.c b/drivers/hwmon/thmc50.c
> index fde5e2d0825a..6a804f5036f4 100644
> --- a/drivers/hwmon/thmc50.c
> +++ b/drivers/hwmon/thmc50.c
> @@ -62,7 +62,7 @@ struct thmc50_data {
>  	enum chips type;
>  	unsigned long last_updated;	/* In jiffies */
>  	char has_temp3;		/* !=0 if it is ADM1022 in temp3 mode */
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  
>  	/* Register values */
>  	s8 temp_input[3];
> @@ -107,7 +107,7 @@ static struct thmc50_data *thmc50_update_device(struct device *dev)
>  		data->alarms =
>  		    i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
> index 9dc210b55e69..88007416c210 100644
> --- a/drivers/hwmon/tmp401.c
> +++ b/drivers/hwmon/tmp401.c
> @@ -136,7 +136,7 @@ struct tmp401_data {
>  	struct i2c_client *client;
>  	const struct attribute_group *groups[3];
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  	enum chips kind;
>  
> @@ -267,7 +267,7 @@ static struct tmp401_data *tmp401_update_device(struct device *dev)
>  		data->temp_crit_hyst = val;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  abort:
> @@ -413,7 +413,7 @@ static ssize_t reset_temp_history_store(struct device *dev,
>  	}
>  	mutex_lock(&data->update_lock);
>  	i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  
>  	return count;
> diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
> index b963a369c5ab..9063d71fc11b 100644
> --- a/drivers/hwmon/tmp421.c
> +++ b/drivers/hwmon/tmp421.c
> @@ -93,7 +93,7 @@ struct tmp421_data {
>  	struct hwmon_channel_info temp_info;
>  	const struct hwmon_channel_info *info[2];
>  	struct hwmon_chip_info chip;
> -	char valid;
> +	bool valid;
>  	unsigned long last_updated;
>  	unsigned long channels;
>  	u8 config;
> @@ -140,14 +140,14 @@ static int tmp421_update_device(struct tmp421_data *data)
>  			data->temp[i] |= ret;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  exit:
>  	mutex_unlock(&data->update_lock);
>  
>  	if (ret < 0) {
> -		data->valid = 0;
> +		data->valid = false;
>  		return ret;
>  	}
>  
> diff --git a/drivers/hwmon/via686a.c b/drivers/hwmon/via686a.c
> index a2eddd2c2538..55634110c2f9 100644
> --- a/drivers/hwmon/via686a.c
> +++ b/drivers/hwmon/via686a.c
> @@ -304,7 +304,7 @@ struct via686a_data {
>  	const char *name;
>  	struct device *hwmon_dev;
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[5];		/* Register value */
> @@ -800,7 +800,7 @@ static struct via686a_data *via686a_update_device(struct device *dev)
>  				       VIA686A_REG_ALARM1) |
>  		    (via686a_read_value(data, VIA686A_REG_ALARM2) << 8);
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/vt1211.c b/drivers/hwmon/vt1211.c
> index 2fbdc532aed4..4a5e911d26eb 100644
> --- a/drivers/hwmon/vt1211.c
> +++ b/drivers/hwmon/vt1211.c
> @@ -105,7 +105,7 @@ struct vt1211_data {
>  	struct device *hwmon_dev;
>  
>  	struct mutex update_lock;
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* Register values */
> @@ -319,7 +319,7 @@ static struct vt1211_data *vt1211_update_device(struct device *dev)
>  				vt1211_read8(data, VT1211_REG_ALARM1);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/vt8231.c b/drivers/hwmon/vt8231.c
> index 6603727e15a0..03275ac8ba72 100644
> --- a/drivers/hwmon/vt8231.c
> +++ b/drivers/hwmon/vt8231.c
> @@ -145,7 +145,7 @@ struct vt8231_data {
>  
>  	struct mutex update_lock;
>  	struct device *hwmon_dev;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[6];		/* Register value */
> @@ -929,7 +929,7 @@ static struct vt8231_data *vt8231_update_device(struct device *dev)
>  			data->alarms &= ~0x80;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
> index 705a59663d42..af89b32a93a5 100644
> --- a/drivers/hwmon/w83627ehf.c
> +++ b/drivers/hwmon/w83627ehf.c
> @@ -320,7 +320,7 @@ struct w83627ehf_data {
>  	const u16 *scale_in;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* Register values */
> @@ -688,7 +688,7 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
>  						W83627EHF_REG_CASEOPEN_DET);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> @@ -1099,7 +1099,7 @@ clear_caseopen(struct device *dev, struct w83627ehf_data *data, int channel,
>  	reg = w83627ehf_read_value(data, W83627EHF_REG_CASEOPEN_CLR);
>  	w83627ehf_write_value(data, W83627EHF_REG_CASEOPEN_CLR, reg | mask);
>  	w83627ehf_write_value(data, W83627EHF_REG_CASEOPEN_CLR, reg & ~mask);
> -	data->valid = 0;	/* Force cache refresh */
> +	data->valid = false;	/* Force cache refresh */
>  	mutex_unlock(&data->update_lock);
>  
>  	return 0;
> @@ -2004,7 +2004,7 @@ static int __maybe_unused w83627ehf_resume(struct device *dev)
>  	w83627ehf_write_value(data, W83627EHF_REG_VBAT, data->vbat);
>  
>  	/* Force re-reading all values */
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  
>  	return 0;
> diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c
> index a07b97400cba..9be277156ed2 100644
> --- a/drivers/hwmon/w83627hf.c
> +++ b/drivers/hwmon/w83627hf.c
> @@ -355,7 +355,7 @@ struct w83627hf_data {
>  	enum chips type;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	u8 in[9];		/* Register value */
> @@ -448,7 +448,7 @@ static int w83627hf_resume(struct device *dev)
>  	w83627hf_write_value(data, W83781D_REG_SCFG2, data->scfg2);
>  
>  	/* Force re-reading all values */
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  
>  	return 0;
> @@ -1905,7 +1905,7 @@ static struct w83627hf_data *w83627hf_update_device(struct device *dev)
>  		    w83627hf_read_value(data, W83781D_REG_BEEP_INTS1) |
>  		    w83627hf_read_value(data, W83781D_REG_BEEP_INTS3) << 16;
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
> index ce8e2c10e854..b3579721265f 100644
> --- a/drivers/hwmon/w83781d.c
> +++ b/drivers/hwmon/w83781d.c
> @@ -203,7 +203,7 @@ struct w83781d_data {
>  	int isa_addr;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	struct i2c_client *lm75[2];	/* for secondary I2C addresses */
> @@ -1554,7 +1554,7 @@ static struct w83781d_data *w83781d_update_device(struct device *dev)
>  					       W83781D_REG_BEEP_INTS3) << 16;
>  		}
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c
> index 37b25a1474c4..ca577cd2a1c9 100644
> --- a/drivers/hwmon/w83791d.c
> +++ b/drivers/hwmon/w83791d.c
> @@ -270,7 +270,7 @@ struct w83791d_data {
>  	struct device *hwmon_dev;
>  	struct mutex update_lock;
>  
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* array of 2 pointers to subclients */
> @@ -1603,7 +1603,7 @@ static struct w83791d_data *w83791d_update_device(struct device *dev)
>  				<< 4;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83792d.c b/drivers/hwmon/w83792d.c
> index abd5c3a722b9..4bfebdab1c60 100644
> --- a/drivers/hwmon/w83792d.c
> +++ b/drivers/hwmon/w83792d.c
> @@ -261,7 +261,7 @@ struct w83792d_data {
>  	struct device *hwmon_dev;
>  
>  	struct mutex update_lock;
> -	char valid;		/* !=0 if following fields are valid */
> +	bool valid;		/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  
>  	/* array of 2 pointers to subclients */
> @@ -743,7 +743,7 @@ intrusion0_alarm_store(struct device *dev, struct device_attribute *attr,
>  	mutex_lock(&data->update_lock);
>  	reg = w83792d_read_value(client, W83792D_REG_CHASSIS_CLR);
>  	w83792d_write_value(client, W83792D_REG_CHASSIS_CLR, reg | 0x80);
> -	data->valid = 0;		/* Force cache refresh */
> +	data->valid = false;		/* Force cache refresh */
>  	mutex_unlock(&data->update_lock);
>  
>  	return count;
> @@ -1595,7 +1595,7 @@ static struct w83792d_data *w83792d_update_device(struct device *dev)
>  		}
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
> index e7d0484eabe4..81221702951a 100644
> --- a/drivers/hwmon/w83793.c
> +++ b/drivers/hwmon/w83793.c
> @@ -205,7 +205,7 @@ struct w83793_data {
>  	struct i2c_client *lm75[2];
>  	struct device *hwmon_dev;
>  	struct mutex update_lock;
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned long last_nonvolatile;	/* In jiffies, last time we update the
>  					 * nonvolatile registers
> @@ -453,7 +453,7 @@ store_chassis_clear(struct device *dev,
>  	mutex_lock(&data->update_lock);
>  	reg = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
>  	w83793_write_value(client, W83793_REG_CLR_CHASSIS, reg | 0x80);
> -	data->valid = 0;		/* Force cache refresh */
> +	data->valid = false;		/* Force cache refresh */
>  	mutex_unlock(&data->update_lock);
>  	return count;
>  }
> @@ -2081,7 +2081,7 @@ static struct w83793_data *w83793_update_device(struct device *dev)
>  		data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
>  	w83793_update_nonvolatile(dev);
>  	data->last_updated = jiffies;
> -	data->valid = 1;
> +	data->valid = true;
>  
>  END:
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c
> index 621b05afa837..45b12c4287df 100644
> --- a/drivers/hwmon/w83795.c
> +++ b/drivers/hwmon/w83795.c
> @@ -379,7 +379,7 @@ struct w83795_data {
>  	u8 enable_beep;
>  	u8 beeps[6];		/* Register value */
>  
> -	char valid;
> +	bool valid;
>  	char valid_limits;
>  	char valid_pwm_config;
>  };
> @@ -684,7 +684,7 @@ static struct w83795_data *w83795_update_device(struct device *dev)
>  			     tmp & ~ALARM_CTRL_RTSACS);
>  
>  	data->last_updated = jiffies;
> -	data->valid = 1;
> +	data->valid = true;
>  
>  END:
>  	mutex_unlock(&data->update_lock);
> @@ -764,7 +764,7 @@ store_chassis_clear(struct device *dev,
>  
>  	/* Clear status and force cache refresh */
>  	w83795_read(client, W83795_REG_ALARM(5));
> -	data->valid = 0;
> +	data->valid = false;
>  	mutex_unlock(&data->update_lock);
>  	return count;
>  }
> diff --git a/drivers/hwmon/w83l785ts.c b/drivers/hwmon/w83l785ts.c
> index 656a77102ca6..a41f989d66e2 100644
> --- a/drivers/hwmon/w83l785ts.c
> +++ b/drivers/hwmon/w83l785ts.c
> @@ -98,7 +98,7 @@ static struct i2c_driver w83l785ts_driver = {
>  struct w83l785ts_data {
>  	struct device *hwmon_dev;
>  	struct mutex update_lock;
> -	char valid; /* zero until following fields are valid */
> +	bool valid; /* false until following fields are valid */
>  	unsigned long last_updated; /* in jiffies */
>  
>  	/* registers values */
> @@ -270,7 +270,7 @@ static struct w83l785ts_data *w83l785ts_update_device(struct device *dev)
>  				W83L785TS_REG_TEMP_OVER, data->temp[1]);
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  	}
>  
>  	mutex_unlock(&data->update_lock);
> diff --git a/drivers/hwmon/w83l786ng.c b/drivers/hwmon/w83l786ng.c
> index 542afff1423b..11ba23c1af85 100644
> --- a/drivers/hwmon/w83l786ng.c
> +++ b/drivers/hwmon/w83l786ng.c
> @@ -113,7 +113,7 @@ DIV_TO_REG(long val)
>  struct w83l786ng_data {
>  	struct i2c_client *client;
>  	struct mutex update_lock;
> -	char valid;			/* !=0 if following fields are valid */
> +	bool valid;			/* true if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
>  	unsigned long last_nonvolatile;	/* In jiffies, last time we update the
>  					 * nonvolatile registers */
> @@ -209,7 +209,7 @@ static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
>  		data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
>  
>  		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->valid = true;
>  
>  	}
>  

[PATCH v3 1/3] hwmon: tmp421: handle I2C errors

[Paul Fertser]

Function i2c_smbus_read_byte_data() can return a negative error number
instead of the data read if I2C transaction failed for whatever reason.

Lack of error checking can lead to serious issues on production
hardware, e.g. errors treated as temperatures produce spurious critical
temperature-crossed-threshold errors in BMC logs for OCP server
hardware. The patch was tested with Mellanox OCP Mezzanine card
emulating TMP421 protocol for temperature sensing which sometimes leads
to I2C protocol error during early boot up stage.

Fixes: 9410700b881f ("hwmon: Add driver for Texas Instruments TMP421/422/423 sensor chips")
Cc: stable@vger.kernel.org
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
---

Changes from v2:
 - Do not change data->valid type as that's an unrelated cleanup
 - Add Fixes: tag
 - Remove clutter from the commit message

Changes from v1:
 - Reorganise code following excellent suggestion by Guenter Roeck
   to use tagged errors consistently

 drivers/hwmon/tmp421.c | 41 +++++++++++++++++++++++++++++++----------
 1 file changed, 31 insertions(+), 10 deletions(-)

diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index ede66ea6a730..e6b2b31d17c8 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -119,38 +119,59 @@ static int temp_from_u16(u16 reg)
 	return (temp * 1000 + 128) / 256;
 }
 
-static struct tmp421_data *tmp421_update_device(struct device *dev)
+static int tmp421_update_device(struct tmp421_data *data)
 {
-	struct tmp421_data *data = dev_get_drvdata(dev);
 	struct i2c_client *client = data->client;
+	int ret = 0;
 	int i;
 
 	mutex_lock(&data->update_lock);
 
 	if (time_after(jiffies, data->last_updated + (HZ / 2)) ||
 	    !data->valid) {
-		data->config = i2c_smbus_read_byte_data(client,
-			TMP421_CONFIG_REG_1);
+		ret = i2c_smbus_read_byte_data(client,
+					       TMP421_CONFIG_REG_1);
+		if (ret < 0)
+			goto exit;
+		data->config = ret;
 
 		for (i = 0; i < data->channels; i++) {
-			data->temp[i] = i2c_smbus_read_byte_data(client,
-				TMP421_TEMP_MSB[i]) << 8;
-			data->temp[i] |= i2c_smbus_read_byte_data(client,
-				TMP421_TEMP_LSB[i]);
+			ret = i2c_smbus_read_byte_data(client,
+						       TMP421_TEMP_MSB[i]);
+			if (ret < 0)
+				goto exit;
+			data->temp[i] = ret << 8;
+
+			ret = i2c_smbus_read_byte_data(client,
+						       TMP421_TEMP_LSB[i]);
+			if (ret < 0)
+				goto exit;
+			data->temp[i] |= ret;
 		}
 		data->last_updated = jiffies;
 		data->valid = 1;
 	}
 
+exit:
 	mutex_unlock(&data->update_lock);
 
-	return data;
+	if (ret < 0) {
+		data->valid = 0;
+		return ret;
+	}
+
+	return 0;
 }
 
 static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
 		       u32 attr, int channel, long *val)
 {
-	struct tmp421_data *tmp421 = tmp421_update_device(dev);
+	struct tmp421_data *tmp421 = dev_get_drvdata(dev);
+	int ret = 0;
+
+	ret = tmp421_update_device(tmp421);
+	if (ret)
+		return ret;
 
 	switch (attr) {
 	case hwmon_temp_input:
-- 
2.17.1

[PATCH v3 2/3] hwmon: tmp421: report /PVLD condition as fault

[Paul Fertser]

For both local and remote sensors all the supported ICs can report an
"undervoltage lockout" condition which means the conversion wasn't
properly performed due to insufficient power supply voltage and so the
measurement results can't be trusted.

Fixes: 9410700b881f ("hwmon: Add driver for Texas Instruments TMP421/422/423 sensor chips")
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
---

Changes from v2:
 - Add Fixes: tag

Changes from v1:
 - Trivial rebase

 drivers/hwmon/tmp421.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index e6b2b31d17c8..3a789f21188c 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -182,10 +182,10 @@ static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
 		return 0;
 	case hwmon_temp_fault:
 		/*
-		 * The OPEN bit signals a fault. This is bit 0 of the temperature
-		 * register (low byte).
+		 * Any of OPEN or /PVLD bits indicate a hardware mulfunction
+		 * and the conversion result may be incorrect
 		 */
-		*val = tmp421->temp[channel] & 0x01;
+		*val = !!(tmp421->temp[channel] & 0x03);
 		return 0;
 	default:
 		return -EOPNOTSUPP;
@@ -198,9 +198,6 @@ static umode_t tmp421_is_visible(const void *data, enum hwmon_sensor_types type,
 {
 	switch (attr) {
 	case hwmon_temp_fault:
-		if (channel == 0)
-			return 0;
-		return 0444;
 	case hwmon_temp_input:
 		return 0444;
 	default:
-- 
2.17.1

Re: [PATCH v3 2/3] hwmon: tmp421: report /PVLD condition as fault

[Guenter Roeck]

On Fri, Sep 24, 2021 at 12:30:10PM +0300, Paul Fertser wrote:
> For both local and remote sensors all the supported ICs can report an
> "undervoltage lockout" condition which means the conversion wasn't
> properly performed due to insufficient power supply voltage and so the
> measurement results can't be trusted.
> 
> Fixes: 9410700b881f ("hwmon: Add driver for Texas Instruments TMP421/422/423 sensor chips")
> Signed-off-by: Paul Fertser <fercerpav@gmail.com>

Applied.

Thanks,
Guenter

> ---
> 
> Changes from v2:
>  - Add Fixes: tag
> 
> Changes from v1:
>  - Trivial rebase
> 
>  drivers/hwmon/tmp421.c | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
> index e6b2b31d17c8..3a789f21188c 100644
> --- a/drivers/hwmon/tmp421.c
> +++ b/drivers/hwmon/tmp421.c
> @@ -182,10 +182,10 @@ static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
>  		return 0;
>  	case hwmon_temp_fault:
>  		/*
> -		 * The OPEN bit signals a fault. This is bit 0 of the temperature
> -		 * register (low byte).
> +		 * Any of OPEN or /PVLD bits indicate a hardware mulfunction
> +		 * and the conversion result may be incorrect
>  		 */
> -		*val = tmp421->temp[channel] & 0x01;
> +		*val = !!(tmp421->temp[channel] & 0x03);
>  		return 0;
>  	default:
>  		return -EOPNOTSUPP;
> @@ -198,9 +198,6 @@ static umode_t tmp421_is_visible(const void *data, enum hwmon_sensor_types type,
>  {
>  	switch (attr) {
>  	case hwmon_temp_fault:
> -		if (channel == 0)
> -			return 0;
> -		return 0444;
>  	case hwmon_temp_input:
>  		return 0444;
>  	default:

[PATCH v3 3/3] hwmon: tmp421: fix rounding for negative values

[Paul Fertser]

Old code produces -24999 for 0b1110011100000000 input in standard format due to
always rounding up rather than "away from zero".

Use the common macro for division, unify and simplify the conversion code along
the way.

Fixes: 9410700b881f ("hwmon: Add driver for Texas Instruments TMP421/422/423 sensor chips")
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
---

Changes from v2:
 - Add Fixes: tag

Changes from v1:
 - Trivial rebase

 drivers/hwmon/tmp421.c | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index 3a789f21188c..85f5f0eb3d2e 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -100,23 +100,17 @@ struct tmp421_data {
 	s16 temp[4];
 };
 
-static int temp_from_s16(s16 reg)
+static int temp_from_raw(u16 reg, bool extended)
 {
 	/* Mask out status bits */
 	int temp = reg & ~0xf;
 
-	return (temp * 1000 + 128) / 256;
-}
-
-static int temp_from_u16(u16 reg)
-{
-	/* Mask out status bits */
-	int temp = reg & ~0xf;
-
-	/* Add offset for extended temperature range. */
-	temp -= 64 * 256;
+	if (extended)
+		temp = temp - 64 * 256;
+	else
+		temp = (s16)temp;
 
-	return (temp * 1000 + 128) / 256;
+	return DIV_ROUND_CLOSEST(temp * 1000, 256);
 }
 
 static int tmp421_update_device(struct tmp421_data *data)
@@ -175,10 +169,8 @@ static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
 
 	switch (attr) {
 	case hwmon_temp_input:
-		if (tmp421->config & TMP421_CONFIG_RANGE)
-			*val = temp_from_u16(tmp421->temp[channel]);
-		else
-			*val = temp_from_s16(tmp421->temp[channel]);
+		*val = temp_from_raw(tmp421->temp[channel],
+				     tmp421->config & TMP421_CONFIG_RANGE);
 		return 0;
 	case hwmon_temp_fault:
 		/*
-- 
2.17.1

Re: [PATCH v3 3/3] hwmon: tmp421: fix rounding for negative values

[Guenter Roeck]

On Fri, Sep 24, 2021 at 12:30:11PM +0300, Paul Fertser wrote:
> Old code produces -24999 for 0b1110011100000000 input in standard format due to
> always rounding up rather than "away from zero".
> 
> Use the common macro for division, unify and simplify the conversion code along
> the way.
> 
> Fixes: 9410700b881f ("hwmon: Add driver for Texas Instruments TMP421/422/423 sensor chips")
> Signed-off-by: Paul Fertser <fercerpav@gmail.com>

Applied.

Thanks,
Guenter

> ---
> 
> Changes from v2:
>  - Add Fixes: tag
> 
> Changes from v1:
>  - Trivial rebase
> 
>  drivers/hwmon/tmp421.c | 24 ++++++++----------------
>  1 file changed, 8 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
> index 3a789f21188c..85f5f0eb3d2e 100644
> --- a/drivers/hwmon/tmp421.c
> +++ b/drivers/hwmon/tmp421.c
> @@ -100,23 +100,17 @@ struct tmp421_data {
>  	s16 temp[4];
>  };
>  
> -static int temp_from_s16(s16 reg)
> +static int temp_from_raw(u16 reg, bool extended)
>  {
>  	/* Mask out status bits */
>  	int temp = reg & ~0xf;
>  
> -	return (temp * 1000 + 128) / 256;
> -}
> -
> -static int temp_from_u16(u16 reg)
> -{
> -	/* Mask out status bits */
> -	int temp = reg & ~0xf;
> -
> -	/* Add offset for extended temperature range. */
> -	temp -= 64 * 256;
> +	if (extended)
> +		temp = temp - 64 * 256;
> +	else
> +		temp = (s16)temp;
>  
> -	return (temp * 1000 + 128) / 256;
> +	return DIV_ROUND_CLOSEST(temp * 1000, 256);
>  }
>  
>  static int tmp421_update_device(struct tmp421_data *data)
> @@ -175,10 +169,8 @@ static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
>  
>  	switch (attr) {
>  	case hwmon_temp_input:
> -		if (tmp421->config & TMP421_CONFIG_RANGE)
> -			*val = temp_from_u16(tmp421->temp[channel]);
> -		else
> -			*val = temp_from_s16(tmp421->temp[channel]);
> +		*val = temp_from_raw(tmp421->temp[channel],
> +				     tmp421->config & TMP421_CONFIG_RANGE);
>  		return 0;
>  	case hwmon_temp_fault:
>  		/*

Re: [PATCH v3 1/3] hwmon: tmp421: handle I2C errors

[Guenter Roeck]

On Fri, Sep 24, 2021 at 12:30:09PM +0300, Paul Fertser wrote:
> Function i2c_smbus_read_byte_data() can return a negative error number
> instead of the data read if I2C transaction failed for whatever reason.
> 
> Lack of error checking can lead to serious issues on production
> hardware, e.g. errors treated as temperatures produce spurious critical
> temperature-crossed-threshold errors in BMC logs for OCP server
> hardware. The patch was tested with Mellanox OCP Mezzanine card
> emulating TMP421 protocol for temperature sensing which sometimes leads
> to I2C protocol error during early boot up stage.
> 
> Fixes: 9410700b881f ("hwmon: Add driver for Texas Instruments TMP421/422/423 sensor chips")
> Cc: stable@vger.kernel.org
> Signed-off-by: Paul Fertser <fercerpav@gmail.com>

Applied.

Thanks,
Guenter

> ---
> 
> Changes from v2:
>  - Do not change data->valid type as that's an unrelated cleanup
>  - Add Fixes: tag
>  - Remove clutter from the commit message
> 
> Changes from v1:
>  - Reorganise code following excellent suggestion by Guenter Roeck
>    to use tagged errors consistently
> 
>  drivers/hwmon/tmp421.c | 41 +++++++++++++++++++++++++++++++----------
>  1 file changed, 31 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
> index ede66ea6a730..e6b2b31d17c8 100644
> --- a/drivers/hwmon/tmp421.c
> +++ b/drivers/hwmon/tmp421.c
> @@ -119,38 +119,59 @@ static int temp_from_u16(u16 reg)
>  	return (temp * 1000 + 128) / 256;
>  }
>  
> -static struct tmp421_data *tmp421_update_device(struct device *dev)
> +static int tmp421_update_device(struct tmp421_data *data)
>  {
> -	struct tmp421_data *data = dev_get_drvdata(dev);
>  	struct i2c_client *client = data->client;
> +	int ret = 0;
>  	int i;
>  
>  	mutex_lock(&data->update_lock);
>  
>  	if (time_after(jiffies, data->last_updated + (HZ / 2)) ||
>  	    !data->valid) {
> -		data->config = i2c_smbus_read_byte_data(client,
> -			TMP421_CONFIG_REG_1);
> +		ret = i2c_smbus_read_byte_data(client,
> +					       TMP421_CONFIG_REG_1);
> +		if (ret < 0)
> +			goto exit;
> +		data->config = ret;
>  
>  		for (i = 0; i < data->channels; i++) {
> -			data->temp[i] = i2c_smbus_read_byte_data(client,
> -				TMP421_TEMP_MSB[i]) << 8;
> -			data->temp[i] |= i2c_smbus_read_byte_data(client,
> -				TMP421_TEMP_LSB[i]);
> +			ret = i2c_smbus_read_byte_data(client,
> +						       TMP421_TEMP_MSB[i]);
> +			if (ret < 0)
> +				goto exit;
> +			data->temp[i] = ret << 8;
> +
> +			ret = i2c_smbus_read_byte_data(client,
> +						       TMP421_TEMP_LSB[i]);
> +			if (ret < 0)
> +				goto exit;
> +			data->temp[i] |= ret;
>  		}
>  		data->last_updated = jiffies;
>  		data->valid = 1;
>  	}
>  
> +exit:
>  	mutex_unlock(&data->update_lock);
>  
> -	return data;
> +	if (ret < 0) {
> +		data->valid = 0;
> +		return ret;
> +	}
> +
> +	return 0;
>  }
>  
>  static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
>  		       u32 attr, int channel, long *val)
>  {
> -	struct tmp421_data *tmp421 = tmp421_update_device(dev);
> +	struct tmp421_data *tmp421 = dev_get_drvdata(dev);
> +	int ret = 0;
> +
> +	ret = tmp421_update_device(tmp421);
> +	if (ret)
> +		return ret;
>  
>  	switch (attr) {
>  	case hwmon_temp_input: