[PATCH] iio: adc: mt6360: strengthen return check of mt6360_adc_read_channel

[trix at redhat.com]

From: Tom Rix <trix at redhat.com>

Clang static analysis reports this issue
mt6360-adc.c:277:20: warning: Assigned value is
  garbage or undefined
  data.values[i++] = val;
                   ^ ~~~

val is set by a successful call to m6360_adc_read_channel().
A negative return is checked but within m6360_adc_read_channel,
a non zero check is done.
Strengthen the check to non zero.

Signed-off-by: Tom Rix <trix at redhat.com>
---
 drivers/iio/adc/mt6360-adc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/mt6360-adc.c b/drivers/iio/adc/mt6360-adc.c
index 07c0e67683910..9fb6dc305a392 100644
--- a/drivers/iio/adc/mt6360-adc.c
+++ b/drivers/iio/adc/mt6360-adc.c
@@ -269,7 +269,7 @@ static irqreturn_t mt6360_adc_trigger_handler(int irq, void *p)
 	memset(&data, 0, sizeof(data));
 	for_each_set_bit(bit, indio_dev->active_scan_mask, indio_dev->masklength) {
 		ret = mt6360_adc_read_channel(mad, bit, &val);
-		if (ret < 0) {
+		if (ret) {
 			dev_warn(&indio_dev->dev, "Failed to get channel %d conversion val\n", bit);
 			goto out;
 		}
-- 
2.26.3