[PATCH] iio: adc: fix uninitialized variable warning

From: Arnd Bergmann
Date: Mon Mar 04 2019 - 15:03:46 EST


The pm8xxx_xoadc_probe() function triggers a bogus warning
about an uninitialized variable:

drivers/iio/adc/qcom-pm8xxx-xoadc.c: In function 'pm8xxx_xoadc_probe':
drivers/iio/adc/qcom-pm8xxx-xoadc.c:633:8: error: 'ch' may be used uninitialized in this function [-Werror=maybe-uninitialized]

Reword the function so the compiler can see more easily that it
is always initialized.

Fixes: 63c3ecd946d4 ("iio: adc: add a driver for Qualcomm PM8xxx HK/XOADC")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/iio/adc/qcom-pm8xxx-xoadc.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
index c30c002f1fef..7939238001c8 100644
--- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c
+++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
@@ -423,7 +423,7 @@ static irqreturn_t pm8xxx_eoc_irq(int irq, void *d)
static struct pm8xxx_chan_info *
pm8xxx_get_channel(struct pm8xxx_xoadc *adc, u8 chan)
{
- struct pm8xxx_chan_info *ch;
+ struct pm8xxx_chan_info *ch = NULL;
int i;

for (i = 0; i < adc->nchans; i++) {
@@ -431,8 +431,6 @@ pm8xxx_get_channel(struct pm8xxx_xoadc *adc, u8 chan)
if (ch->hwchan->amux_channel == chan)
break;
}
- if (i == adc->nchans)
- return NULL;

return ch;
}
--
2.20.0