diff --git a/drivers/iio/afe/iio-rescale.c b/drivers/iio/afe/iio-rescale.c
index 56e5913ab82d1c045c9ca27012008a4495502cbf..78bb86c291706748b4072a484532ad20c415ff9f 100644
--- a/drivers/iio/afe/iio-rescale.c
+++ b/drivers/iio/afe/iio-rescale.c
@@ -249,9 +249,17 @@ static int rescale_read_avail(struct iio_dev *indio_dev,
 	}
 }
 
+static void rescale_read_avail_release_res(struct iio_dev *indio_dev,
+					   struct iio_chan_spec const *chan,
+					   const int *vals, long mask)
+{
+	kfree(vals);
+}
+
 static const struct iio_info rescale_info = {
 	.read_raw = rescale_read_raw,
 	.read_avail = rescale_read_avail,
+	.read_avail_release_resource = rescale_read_avail_release_res,
 };
 
 static ssize_t rescale_read_ext_info(struct iio_dev *indio_dev,
diff --git a/drivers/iio/dac/dpot-dac.c b/drivers/iio/dac/dpot-dac.c
index f36f10bfb6be7863a56b911b5f58671ef530c977..43d68e17fc3a5fca59fad6ccf818eeadfecdb8c1 100644
--- a/drivers/iio/dac/dpot-dac.c
+++ b/drivers/iio/dac/dpot-dac.c
@@ -108,6 +108,13 @@ static int dpot_dac_read_avail(struct iio_dev *indio_dev,
 	return -EINVAL;
 }
 
+static void dpot_dac_read_avail_release_res(struct iio_dev *indio_dev,
+					    struct iio_chan_spec const *chan,
+					    const int *vals, long mask)
+{
+	kfree(vals);
+}
+
 static int dpot_dac_write_raw(struct iio_dev *indio_dev,
 			      struct iio_chan_spec const *chan,
 			      int val, int val2, long mask)
@@ -125,6 +132,7 @@ static int dpot_dac_write_raw(struct iio_dev *indio_dev,
 static const struct iio_info dpot_dac_info = {
 	.read_raw = dpot_dac_read_raw,
 	.read_avail = dpot_dac_read_avail,
+	.read_avail_release_resource = dpot_dac_read_avail_release_res,
 	.write_raw = dpot_dac_write_raw,
 };
 
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 7f325b3ed08fae6674245312cf8f57bb151006c0..7f50e33dc5084673aa66c25731add0c314cb477d 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -760,9 +760,29 @@ static int iio_channel_read_avail(struct iio_channel *chan,
 	if (!iio_channel_has_available(chan->channel, info))
 		return -EINVAL;
 
-	if (iio_info->read_avail)
-		return iio_info->read_avail(chan->indio_dev, chan->channel,
-					    vals, type, length, info);
+	if (iio_info->read_avail) {
+		const int *vals_tmp;
+		int ret;
+
+		ret = iio_info->read_avail(chan->indio_dev, chan->channel,
+					   &vals_tmp, type, length, info);
+		if (ret < 0)
+			return ret;
+
+		/*
+		 * Copy the producer's avail buffer with lock_exists locked to
+		 * avoid possible race with producer unregistration.
+		 */
+		*vals = kmemdup_array(vals_tmp, *length, sizeof(int), GFP_KERNEL);
+		if (!*vals)
+			return -ENOMEM;
+
+		if (iio_info->read_avail_release_resource)
+			iio_info->read_avail_release_resource(
+				chan->indio_dev, chan->channel, vals_tmp, info);
+
+		return ret;
+	}
 	return -EINVAL;
 }
 
@@ -789,9 +809,11 @@ int iio_read_avail_channel_raw(struct iio_channel *chan,
 	ret = iio_read_avail_channel_attribute(chan, vals, &type, length,
 					       IIO_CHAN_INFO_RAW);
 
-	if (ret >= 0 && type != IIO_VAL_INT)
+	if (ret >= 0 && type != IIO_VAL_INT) {
 		/* raw values are assumed to be IIO_VAL_INT */
+		kfree(*vals);
 		ret = -EINVAL;
+	}
 
 	return ret;
 }
@@ -820,24 +842,31 @@ static int iio_channel_read_max(struct iio_channel *chan,
 			if (val2)
 				*val2 = vals[5];
 		}
-		return 0;
+		ret = 0;
+		break;
 
 	case IIO_AVAIL_LIST:
-		if (length <= 0)
-			return -EINVAL;
+		if (length <= 0) {
+			ret = -EINVAL;
+			goto out;
+		}
 		switch (*type) {
 		case IIO_VAL_INT:
 			*val = max_array(vals, length);
+			ret = 0;
 			break;
 		default:
 			/* TODO: learn about max for other iio values */
-			return -EINVAL;
+			ret = -EINVAL;
 		}
-		return 0;
+		break;
 
 	default:
-		return -EINVAL;
+		ret = -EINVAL;
 	}
+out:
+	kfree(vals);
+	return ret;
 }
 
 int iio_read_max_channel_raw(struct iio_channel *chan, int *val)
@@ -876,24 +905,31 @@ static int iio_channel_read_min(struct iio_channel *chan,
 			if (val2)
 				*val2 = vals[1];
 		}
-		return 0;
+		ret = 0;
+		break;
 
 	case IIO_AVAIL_LIST:
-		if (length <= 0)
-			return -EINVAL;
+		if (length <= 0) {
+			ret = -EINVAL;
+			goto out;
+		}
 		switch (*type) {
 		case IIO_VAL_INT:
 			*val = min_array(vals, length);
+			ret = 0;
 			break;
 		default:
 			/* TODO: learn about min for other iio values */
-			return -EINVAL;
+			ret = -EINVAL;
 		}
-		return 0;
+		break;
 
 	default:
-		return -EINVAL;
+		ret = -EINVAL;
 	}
+out:
+	kfree(vals);
+	return ret;
 }
 
 int iio_read_min_channel_raw(struct iio_channel *chan, int *val)
diff --git a/drivers/iio/multiplexer/iio-mux.c b/drivers/iio/multiplexer/iio-mux.c
index 2953403bef53bbe47a97a8ab1c475ed88d7f86d2..31345437784b01c5d6f8ea70263f4c2574388e7a 100644
--- a/drivers/iio/multiplexer/iio-mux.c
+++ b/drivers/iio/multiplexer/iio-mux.c
@@ -142,6 +142,13 @@ static int mux_read_avail(struct iio_dev *indio_dev,
 	return ret;
 }
 
+static void mux_read_avail_release_res(struct iio_dev *indio_dev,
+				       struct iio_chan_spec const *chan,
+				       const int *vals, long mask)
+{
+	kfree(vals);
+}
+
 static int mux_write_raw(struct iio_dev *indio_dev,
 			 struct iio_chan_spec const *chan,
 			 int val, int val2, long mask)
@@ -171,6 +178,7 @@ static int mux_write_raw(struct iio_dev *indio_dev,
 static const struct iio_info mux_info = {
 	.read_raw = mux_read_raw,
 	.read_avail = mux_read_avail,
+	.read_avail_release_resource = mux_read_avail_release_res,
 	.write_raw = mux_write_raw,
 };
 
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[] = {
diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h
index 333d1d8ccb37f387fe531577ac5e0bfc7f752cec..e3e268d2574b3e01c9412449d90d627de7efcd84 100644
--- a/include/linux/iio/consumer.h
+++ b/include/linux/iio/consumer.h
@@ -316,7 +316,7 @@ int iio_read_min_channel_raw(struct iio_channel *chan, int *val);
 /**
  * iio_read_avail_channel_raw() - read available raw values from a given channel
  * @chan:		The channel being queried.
- * @vals:		Available values read back.
+ * @vals:		Available values read back. Must be freed after use.
  * @length:		Number of entries in vals.
  *
  * Returns an error code, IIO_AVAIL_RANGE or IIO_AVAIL_LIST.
@@ -334,7 +334,7 @@ int iio_read_avail_channel_raw(struct iio_channel *chan,
 /**
  * iio_read_avail_channel_attribute() - read available channel attribute values
  * @chan:		The channel being queried.
- * @vals:		Available values read back.
+ * @vals:		Available values read back. Must be freed after use.
  * @type:		Type of values read back.
  * @length:		Number of entries in vals.
  * @attribute:		info attribute to be read back.
