[patch] Staging: iio/dac/ad5360.c: signedness bug in ad5360_read_raw()

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ad5360_get_channel_vref() returns an int and scale_uv should be the
same.  Making it unsigned here breaks the error handling.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/staging/iio/dac/ad5360.c b/drivers/staging/iio/dac/ad5360.c
index 72d0f3f..cfeea72 100644
--- a/drivers/staging/iio/dac/ad5360.c
+++ b/drivers/staging/iio/dac/ad5360.c
@@ -371,8 +371,8 @@ static int ad5360_read_raw(struct iio_dev *indio_dev,
 			   long m)
 {
 	struct ad5360_state *st = iio_priv(indio_dev);
-	unsigned long scale_uv;
 	unsigned int ofs_index;
+	int scale_uv;
 	int ret;
 
 	switch (m) {
--
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