[PATCH 1/3] iio: filter: admv8818: Add missing error code

[Ethan Tidmore <ethantidmore06@gmail.com>]

If the macro FIELD_GET() returns an error code the function returns
with 0 because ret was just confirmed to be 0 a few lines above.

Add error code.

Detected by Smatch:
drivers/iio/filter/admv8818.c:335 __admv8818_read_hpf_freq() warn:
missing error code? 'ret'

drivers/iio/filter/admv8818.c:376 __admv8818_read_lpf_freq()
warn: missing error code? 'ret'

Fixes: f34fe888ad054 ("iio:filter:admv8818: add support for ADMV8818")
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
---
 drivers/iio/filter/admv8818.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/filter/admv8818.c b/drivers/iio/filter/admv8818.c
index e494fd33911b..4d5e7a9d806a 100644
--- a/drivers/iio/filter/admv8818.c
+++ b/drivers/iio/filter/admv8818.c
@@ -332,7 +332,7 @@ static int __admv8818_read_hpf_freq(struct admv8818_state *st, u64 *hpf_freq)
 	hpf_band = FIELD_GET(ADMV8818_SW_IN_WR0_MSK, data);
 	if (!hpf_band || hpf_band > 4) {
 		*hpf_freq = 0;
-		return ret;
+		return -EINVAL;
 	}
 
 	ret = regmap_read(st->regmap, ADMV8818_REG_WR0_FILTER, &data);
@@ -373,7 +373,7 @@ static int __admv8818_read_lpf_freq(struct admv8818_state *st, u64 *lpf_freq)
 	lpf_band = FIELD_GET(ADMV8818_SW_OUT_WR0_MSK, data);
 	if (!lpf_band || lpf_band > 4) {
 		*lpf_freq = 0;
-		return ret;
+		return -EINVAL;
 	}
 
 	ret = regmap_read(st->regmap, ADMV8818_REG_WR0_FILTER, &data);
-- 
2.53.0