8 files changed, 11 insertions, 32 deletions

diff --git a/drivers/iio/dac/ad5360.c b/drivers/iio/dac/ad5360.c
index a57b0a093112..8271849b1c83 100644
--- a/drivers/iio/dac/ad5360.c
+++ b/drivers/iio/dac/ad5360.c
@@ -262,7 +262,7 @@ static int ad5360_update_ctrl(struct iio_dev *indio_dev, unsigned int set,
 	unsigned int clr)
 {
 	struct ad5360_state *st = iio_priv(indio_dev);
-	unsigned int ret;
+	int ret;
 
 	mutex_lock(&st->lock);
 
diff --git a/drivers/iio/dac/ad5380.c b/drivers/iio/dac/ad5380.c
index 0ddce7b218e3..8b813cee7625 100644
--- a/drivers/iio/dac/ad5380.c
+++ b/drivers/iio/dac/ad5380.c
@@ -371,10 +371,8 @@ static int ad5380_probe(struct device *dev, struct regmap *regmap,
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
-	if (indio_dev == NULL) {
-		dev_err(dev, "Failed to allocate iio device\n");
+	if (indio_dev == NULL)
 		return -ENOMEM;
-	}
 
 	st = iio_priv(indio_dev);
 
diff --git a/drivers/iio/dac/ad5421.c b/drivers/iio/dac/ad5421.c
index 1462ee640b16..d9d7031c4432 100644
--- a/drivers/iio/dac/ad5421.c
+++ b/drivers/iio/dac/ad5421.c
@@ -186,7 +186,7 @@ static int ad5421_update_ctrl(struct iio_dev *indio_dev, unsigned int set,
 	unsigned int clr)
 {
 	struct ad5421_state *st = iio_priv(indio_dev);
-	unsigned int ret;
+	int ret;
 
 	mutex_lock(&st->lock);
 
diff --git a/drivers/iio/dac/ad5764.c b/drivers/iio/dac/ad5764.c
index 26c049d5b73a..fbbd7105a80c 100644
--- a/drivers/iio/dac/ad5764.c
+++ b/drivers/iio/dac/ad5764.c
@@ -278,10 +278,8 @@ static int ad5764_probe(struct spi_device *spi)
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
-	if (indio_dev == NULL) {
-		dev_err(&spi->dev, "Failed to allocate iio device\n");
+	if (indio_dev == NULL)
 		return -ENOMEM;
-	}
 
 	st = iio_priv(indio_dev);
 	spi_set_drvdata(spi, indio_dev);
diff --git a/drivers/iio/dac/ad5791.c b/drivers/iio/dac/ad5791.c
index 41582f2b90fb..ae7297f08398 100644
--- a/drivers/iio/dac/ad5791.c
+++ b/drivers/iio/dac/ad5791.c
@@ -80,8 +80,6 @@ struct ad5791_chip_info {
 /**
  * struct ad5791_state - driver instance specific data
  * @spi:			spi_device
- * @reg_vdd:		positive supply regulator
- * @reg_vss:		negative supply regulator
  * @gpio_reset:		reset gpio
  * @gpio_clear:		clear gpio
  * @gpio_ldac:		load dac gpio
@@ -100,8 +98,6 @@ struct ad5791_chip_info {
  */
 struct ad5791_state {
 	struct spi_device		*spi;
-	struct regulator		*reg_vdd;
-	struct regulator		*reg_vss;
 	struct gpio_desc		*gpio_reset;
 	struct gpio_desc		*gpio_clear;
 	struct gpio_desc		*gpio_ldac;
diff --git a/drivers/iio/dac/ds4424.c b/drivers/iio/dac/ds4424.c
index a26a99753418..a8198ba4f98a 100644
--- a/drivers/iio/dac/ds4424.c
+++ b/drivers/iio/dac/ds4424.c
@@ -221,10 +221,8 @@ static int ds4424_probe(struct i2c_client *client)
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
-	if (!indio_dev) {
-		dev_err(&client->dev, "iio dev alloc failed.\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	data = iio_priv(indio_dev);
 	i2c_set_clientdata(client, indio_dev);
diff --git a/drivers/iio/dac/stm32-dac.c b/drivers/iio/dac/stm32-dac.c
index 344388338d9b..b860e18d52a1 100644
--- a/drivers/iio/dac/stm32-dac.c
+++ b/drivers/iio/dac/stm32-dac.c
@@ -82,9 +82,11 @@ static int stm32_dac_set_enable_state(struct iio_dev *indio_dev, int ch,
 
 	ret = regmap_update_bits(dac->common->regmap, STM32_DAC_CR, msk, en);
 	mutex_unlock(&dac->lock);
-	if (ret < 0) {
+	if (ret) {
 		dev_err(&indio_dev->dev, "%s failed\n", str_enable_disable(en));
-		goto err_put_pm;
+		if (enable)
+			pm_runtime_put_autosuspend(dev);
+		return ret;
 	}
 
 	/*
@@ -95,20 +97,10 @@ static int stm32_dac_set_enable_state(struct iio_dev *indio_dev, int ch,
 	if (en && dac->common->hfsel)
 		udelay(1);
 
-	if (!enable) {
-		pm_runtime_mark_last_busy(dev);
+	if (!enable)
 		pm_runtime_put_autosuspend(dev);
-	}
 
 	return 0;
-
-err_put_pm:
-	if (enable) {
-		pm_runtime_mark_last_busy(dev);
-		pm_runtime_put_autosuspend(dev);
-	}
-
-	return ret;
 }
 
 static int stm32_dac_get_value(struct stm32_dac *dac, int channel, int *val)
@@ -349,7 +341,6 @@ static int stm32_dac_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_pm_put;
 
-	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 
 	return 0;
diff --git a/drivers/iio/dac/ti-dac7311.c b/drivers/iio/dac/ti-dac7311.c
index 3d2ce61f0db6..5c1c5213962f 100644
--- a/drivers/iio/dac/ti-dac7311.c
+++ b/drivers/iio/dac/ti-dac7311.c
@@ -242,10 +242,8 @@ static int ti_dac_probe(struct spi_device *spi)
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*ti_dac));
-	if (!indio_dev) {
-		dev_err(dev, "can not allocate iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	spi->mode = SPI_MODE_1;
 	spi->bits_per_word = 16;