[PATCH AUTOSEL 4.19 081/172] power: supply: lp8788: Fix an error handling path in 'lp8788_charger_probe()'

Sasha Levin
2020-06-18T02:01:42Z

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

[ Upstream commit 934ed3847a4ebc75b655659c4d2349ba4337941c ]

In the probe function, in case of error, resources allocated in
'lp8788_setup_adc_channel()' must be released.

This can be achieved easily by using the devm_ variant of
'iio_channel_get()'.
This has the extra benefit to simplify the remove function and to axe the
'lp8788_release_adc_channel()' function which is now useless.

Fixes: 98a276649358 ("power_supply: Add new lp8788 charger driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/power/supply/lp8788-charger.c | 18 ++----------------
1 file changed, 2 insertions(+), 16 deletions(-)

diff --git a/drivers/power/supply/lp8788-charger.c b/drivers/power/supply/lp8788-charger.c
index 0f3432795f3c..b8f7dac7ac3f 100644
--- a/drivers/power/supply/lp8788-charger.c
+++ b/drivers/power/supply/lp8788-charger.c
@@ -600,27 +600,14 @@ static void lp8788_setup_adc_channel(struct device *dev,
return;

/* ADC channel for battery voltage */
- chan = iio_channel_get(dev, pdata->adc_vbatt);
+ chan = devm_iio_channel_get(dev, pdata->adc_vbatt);
pchg->chan[LP8788_VBATT] = IS_ERR(chan) ? NULL : chan;

/* ADC channel for battery temperature */
- chan = iio_channel_get(dev, pdata->adc_batt_temp);
+ chan = devm_iio_channel_get(dev, pdata->adc_batt_temp);
pchg->chan[LP8788_BATT_TEMP] = IS_ERR(chan) ? NULL : chan;
}

-static void lp8788_release_adc_channel(struct lp8788_charger *pchg)
-{
- int i;
-
- for (i = 0; i < LP8788_NUM_CHG_ADC; i++) {
- if (!pchg->chan[i])
- continue;
-
- iio_channel_release(pchg->chan[i]);
- pchg->chan[i] = NULL;
- }
-}
-
static ssize_t lp8788_show_charger_status(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -747,7 +734,6 @@ static int lp8788_charger_remove(struct platform_device *pdev)
lp8788_irq_unregister(pdev, pchg);
sysfs_remove_group(&pdev->dev.kobj, &lp8788_attr_group);
lp8788_psy_unregister(pchg);
- lp8788_release_adc_channel(pchg);

return 0;
}
--
2.25.1