diff mbox series

[1/3] power: supply: ab8500: Fix error handling when calling iio_read_channel_processed()

Message ID f9f65642331c9e40aaebb888589db043db80b7eb.1719037737.git.christophe.jaillet@wanadoo.fr
State New
Headers show
Series power: supply: ab8500: Improve code related to iio_read_channel_processed() and fix a bug | expand

Commit Message

Christophe JAILLET June 22, 2024, 7:04 a.m. UTC 
The ab8500_charger_get_[ac|vbus]_[current|voltage]() functions should
return an error code on error.

Up to now, an un-initialized value is returned.
This makes the error handling of the callers un-reliable.

Return the error code instead, to fix the issue.

Fixes: 97ab78bac5d0 ("power: supply: ab8500_charger: Convert to IIO ADC")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
Compile tested only, but should be fine because it restores the behavior
before 97ab78bac5d0.
---
 drivers/power/supply/ab8500_charger.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

Comments

Jonathan Cameron June 23, 2024, 5:16 p.m. UTC | #1 
On Sat, 22 Jun 2024 09:04:24 +0200
Christophe JAILLET <christophe.jaillet@wanadoo.fr> wrote:

> The ab8500_charger_get_[ac|vbus]_[current|voltage]() functions should
> return an error code on error.
> 
> Up to now, an un-initialized value is returned.
> This makes the error handling of the callers un-reliable.
> 
> Return the error code instead, to fix the issue.
> 
> Fixes: 97ab78bac5d0 ("power: supply: ab8500_charger: Convert to IIO ADC")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Looks right to me.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
diff mbox series

Patch

diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c
index 9b34d1a60f66..4b0ad1b4b4c9 100644
--- a/drivers/power/supply/ab8500_charger.c
+++ b/drivers/power/supply/ab8500_charger.c
@@ -488,8 +488,10 @@  static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
 	/* Only measure voltage if the charger is connected */
 	if (di->ac.charger_connected) {
 		ret = iio_read_channel_processed(di->adc_main_charger_v, &vch);
-		if (ret < 0)
+		if (ret < 0) {
 			dev_err(di->dev, "%s ADC conv failed,\n", __func__);
+			return ret;
+		}
 	} else {
 		vch = 0;
 	}
@@ -540,8 +542,10 @@  static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
 	/* Only measure voltage if the charger is connected */
 	if (di->usb.charger_connected) {
 		ret = iio_read_channel_processed(di->adc_vbus_v, &vch);
-		if (ret < 0)
+		if (ret < 0) {
 			dev_err(di->dev, "%s ADC conv failed,\n", __func__);
+			return ret;
+		}
 	} else {
 		vch = 0;
 	}
@@ -563,8 +567,10 @@  static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
 	/* Only measure current if the charger is online */
 	if (di->usb.charger_online) {
 		ret = iio_read_channel_processed(di->adc_usb_charger_c, &ich);
-		if (ret < 0)
+		if (ret < 0) {
 			dev_err(di->dev, "%s ADC conv failed,\n", __func__);
+			return ret;
+		}
 	} else {
 		ich = 0;
 	}
@@ -586,8 +592,10 @@  static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
 	/* Only measure current if the charger is online */
 	if (di->ac.charger_online) {
 		ret = iio_read_channel_processed(di->adc_main_charger_c, &ich);
-		if (ret < 0)
+		if (ret < 0) {
 			dev_err(di->dev, "%s ADC conv failed,\n", __func__);
+			return ret;
+		}
 	} else {
 		ich = 0;
 	}