[PATCH] drivers: adc: fix return value if timeout occurs

[Francois Berder]

Because unsigned integers cannot be negative,
timeout variable is never less than zero. Hence, checks
in Amlogic Meson ADC driver to detect timeouts always
evaluated to false. Fix that.

Signed-off-by: Francois Berder <fberder at outlook.fr>
---

 drivers/adc/meson-saradc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/adc/meson-saradc.c b/drivers/adc/meson-saradc.c
index 1a45a3a265..a48200a769 100644
--- a/drivers/adc/meson-saradc.c
+++ b/drivers/adc/meson-saradc.c
@@ -192,7 +192,8 @@ meson_saradc_get_fifo_count(struct meson_saradc_priv *priv)
 
 static int meson_saradc_lock(struct meson_saradc_priv *priv)
 {
-	uint val, timeout = 10000;
+	uint val;
+	int timeout = 10000;
 
 	/* prevent BL30 from using the SAR ADC while we are using it */
 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY,
@@ -246,7 +247,8 @@ static int meson_saradc_calib_val(struct meson_saradc_priv *priv, int val)
 
 static int meson_saradc_wait_busy_clear(struct meson_saradc_priv *priv)
 {
-	uint regval, timeout = 10000;
+	uint regval;
+	int timeout = 10000;
 
 	/*
 	 * NOTE: we need a small delay before reading the status, otherwise
-- 
2.30.1 (Apple Git-130)