iio: fix: Keep a reference to the IIO device for open file descriptors
Make sure that the IIO device is not freed while we still have file descriptors
for it.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 2cc0778..8f7b6c9 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -970,6 +970,8 @@
if (test_and_set_bit(IIO_BUSY_BIT_POS, &indio_dev->flags))
return -EBUSY;
+ iio_device_get(indio_dev);
+
filp->private_data = indio_dev;
return 0;
@@ -983,6 +985,8 @@
struct iio_dev *indio_dev = container_of(inode->i_cdev,
struct iio_dev, chrdev);
clear_bit(IIO_BUSY_BIT_POS, &indio_dev->flags);
+ iio_device_put(indio_dev);
+
return 0;
}
