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iio: adc: rzg2l_adc: Simplify the locking scheme in rzg2l_adc_read_raw()

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Simplify the locking scheme in rzg2l_adc_read_raw() by using
guard(mutex)().

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/20241206111337.726244-8-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Claudiu Beznea
2024-12-06 13:13:29 +02:00
committed by Jonathan Cameron
parent b7549624af
commit 5d7fb2d589
1 changed files with 7 additions and 6 deletions
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13
drivers/iio/adc/rzg2l_adc.c
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@@ -8,6 +8,7 @@
*/
#include <linux/bitfield.h>
#include <linux/cleanup.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/iio/iio.h>
@@ -220,21 +221,21 @@ static int rzg2l_adc_read_raw(struct iio_dev *indio_dev,
u8 ch;
switch (mask) {
case IIO_CHAN_INFO_RAW:
case IIO_CHAN_INFO_RAW: {
if (chan->type != IIO_VOLTAGE)
return -EINVAL;
mutex_lock(&adc->lock);
guard(mutex)(&adc->lock);
ch = chan->channel & RZG2L_ADC_CHN_MASK;
ret = rzg2l_adc_conversion(indio_dev, adc, ch);
if (ret) {
mutex_unlock(&adc->lock);
if (ret)
return ret;
}
*val = adc->last_val[ch];
mutex_unlock(&adc->lock);
return IIO_VAL_INT;
}
default:
return -EINVAL;