Merge tag 'iio-fixes-for-4.7b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

Second set of IIO fixes for the 4.7 cycle.

This includes one tracked regression (Arnd's patch for the ad7606).
The other two have I think always been broken.

* inv_mpu6050
  - Fix a use after free in the ACPI code.
* ad5933
  - The code for setting the cycles had a bug that meant it was simply wrong.
* ad7606_spi
  - Fix a regression that got introduced in a buggy cleanup of a sparse
    warning.

drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c

@@ -56,6 +56,7 @@ static int asus_acpi_get_sensor_info(struct acpi_device *adev,
 	int i;
 	acpi_status status;
 	union acpi_object *cpm;
+	int ret;
 
 	status = acpi_evaluate_object(adev->handle, "CNF0", NULL, &buffer);
 	if (ACPI_FAILURE(status))
@@ -82,10 +83,10 @@ static int asus_acpi_get_sensor_info(struct acpi_device *adev,
 			}
 		}
 	}
-
+	ret = cpm->package.count;
 	kfree(buffer.pointer);
 
-	return cpm->package.count;
+	return ret;
 }
 
 static int acpi_i2c_check_resource(struct acpi_resource *ares, void *data)

drivers/staging/iio/adc/ad7606_spi.c

@@ -21,7 +21,7 @@ static int ad7606_spi_read_block(struct device *dev,
 {
 	struct spi_device *spi = to_spi_device(dev);
 	int i, ret;
-	unsigned short *data;
+	unsigned short *data = buf;
 	__be16 *bdata = buf;
 
 	ret = spi_read(spi, buf, count * 2);

drivers/staging/iio/impedance-analyzer/ad5933.c

@@ -444,10 +444,10 @@ static ssize_t ad5933_store(struct device *dev,
 		st->settling_cycles = val;
 
 		/* 2x, 4x handling, see datasheet */
-		if (val > 511)
-			val = (val >> 1) | (1 << 9);
-		else if (val > 1022)
+		if (val > 1022)
 			val = (val >> 2) | (3 << 9);
+		else if (val > 511)
+			val = (val >> 1) | (1 << 9);
 
 		dat = cpu_to_be16(val);
 		ret = ad5933_i2c_write(st->client,