[PATCH v2 7/7] power: supply: ingenic-battery: free scale buffer after use

[Matteo Martelli <matteomartelli3@gmail.com>]

The iio_read_avail_channel_attribute() iio interface now allocates a
copy of the available info buffer that must be freed after use.

Signed-off-by: Matteo Martelli <matteomartelli3@gmail.com>
---
 drivers/power/supply/ingenic-battery.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/power/supply/ingenic-battery.c b/drivers/power/supply/ingenic-battery.c
index 0a40f425c27723ccec49985b8b5e14a737b6a7eb..3db000d9fff9a7a6819631314547b3d16db7f967 100644
--- a/drivers/power/supply/ingenic-battery.c
+++ b/drivers/power/supply/ingenic-battery.c
@@ -12,6 +12,7 @@
 #include <linux/platform_device.h>
 #include <linux/power_supply.h>
 #include <linux/property.h>
+#include <linux/slab.h>
 
 struct ingenic_battery {
 	struct device *dev;
@@ -79,8 +80,10 @@ static int ingenic_battery_set_scale(struct ingenic_battery *bat)
 		dev_err(bat->dev, "Unable to read channel avail scale\n");
 		return ret;
 	}
-	if (ret != IIO_AVAIL_LIST || scale_type != IIO_VAL_FRACTIONAL_LOG2)
-		return -EINVAL;
+	if (ret != IIO_AVAIL_LIST || scale_type != IIO_VAL_FRACTIONAL_LOG2) {
+		ret = -EINVAL;
+		goto out;
+	}
 
 	max_mV = bat->info->voltage_max_design_uv / 1000;
 
@@ -99,7 +102,8 @@ static int ingenic_battery_set_scale(struct ingenic_battery *bat)
 
 	if (best_idx < 0) {
 		dev_err(bat->dev, "Unable to find matching voltage scale\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	/* Only set scale if there is more than one (fractional) entry */
@@ -109,10 +113,13 @@ static int ingenic_battery_set_scale(struct ingenic_battery *bat)
 						  scale_raw[best_idx + 1],
 						  IIO_CHAN_INFO_SCALE);
 		if (ret)
-			return ret;
+			goto out;
 	}
 
-	return 0;
+	ret = 0;
+out:
+	kfree(scale_raw);
+	return ret;
 }
 
 static enum power_supply_property ingenic_battery_properties[] = {

-- 
2.46.2