Merge tag 'iio-fixes-for-3.15a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

First found of IIO fixes for the 3.15 cycle.

* Fix the platform data support for the at91 adc driver.
* A couple of related follow up patches get the support working again
  for at91sam9260 and at91sam9g45 as the earlier patch results in a device
  name change.
* A default timer value in the at91 adc driver was bonkers.  Make it sane.
* Fix incorrect reporting of the integration time for the cm32181 light sensor
* Fix a missing break in the ad2s1200 driver which would have give a false
  error return.
* Make sure buffer scan mask queries from userspace return 0/1 rather than
  a fairly random value depending on their implementation of test_bit
* Fix leak of the i2c client and a null pointer dereference in the cm36651
  driver.
* Fix a build warning on avr32 for the mxs-lradc (not exactly a critical
  combination - but the issue was real).

drivers/iio/industrialio-buffer.c

@@ -165,7 +165,8 @@ static ssize_t iio_scan_el_show(struct device *dev,
 	int ret;
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 
-	ret = test_bit(to_iio_dev_attr(attr)->address,
+	/* Ensure ret is 0 or 1. */
+	ret = !!test_bit(to_iio_dev_attr(attr)->address,
 		       indio_dev->buffer->scan_mask);
 
 	return sprintf(buf, "%d\n", ret);
@@ -862,7 +863,8 @@ int iio_scan_mask_query(struct iio_dev *indio_dev,
 	if (!buffer->scan_mask)
 		return 0;
 
-	return test_bit(bit, buffer->scan_mask);
+	/* Ensure return value is 0 or 1. */
+	return !!test_bit(bit, buffer->scan_mask);
 };
 EXPORT_SYMBOL_GPL(iio_scan_mask_query);