linux-kernel - [PATCH] iio: adc: max9611: Avoid implicit enum conversion warning

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Date:   Fri, 14 Sep 2018 22:25:11 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH] iio: adc: max9611: Avoid implicit enum conversion warning

Clang warns when an enumerated type is implicitly converted to another.

drivers/iio/adc/max9611.c:292:16: warning: implicit conversion from
enumeration type 'enum max9611_conf_ids' to different enumeration type
'enum max9611_csa_gain' [-Wenum-conversion]
                        *csa_gain = gain_selectors[i];
                                  ~ ^~~~~~~~~~~~~~~~~
1 warning generated.

Change the type of the variable 'gain_selectors' to int so that Clang
understands this is expected behavior.

Reported-by: Nick Desaulniers <ndesaulniers@...gle.com>
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
---
 drivers/iio/adc/max9611.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/max9611.c b/drivers/iio/adc/max9611.c
index 0538ff8c4ac1..3c358b16a8fa 100644
--- a/drivers/iio/adc/max9611.c
+++ b/drivers/iio/adc/max9611.c
@@ -275,7 +275,7 @@ static int max9611_read_csa_voltage(struct max9611_dev *max9611,
 				    u16 *adc_raw,
 				    enum max9611_csa_gain *csa_gain)
 {
-	enum max9611_conf_ids gain_selectors[] = {
+	int gain_selectors[] = {
 		CONF_SENSE_1x,
 		CONF_SENSE_4x,
 		CONF_SENSE_8x
-- 
2.18.0