Change return value to 0 if no device is bound since
unsigned int cannot support negative error codes.
Signed-off-by: Cristina Opriceana <cristina.oprice...@gmail.com>
---
drivers/iio/industrialio-buffer.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/industrialio-buffer.c
b/drivers/iio/industrialio-buffer.c
index faed6ef..e8e87cf 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -155,7 +155,9 @@ ssize_t iio_buffer_read_first_n_outer(struct file *filp,
char __user *buf,
* a wait queue
*
* Return: (POLLIN | POLLRDNORM) if data is available for reading
- * or 0 for other cases
+ * and 0 for other cases, e.g. no device is bound or no
+ * hardware fifo flush could be triggered.
+ *
*/
unsigned int iio_buffer_poll(struct file *filp,
struct poll_table_struct *wait)
@@ -164,7 +166,7 @@ unsigned int iio_buffer_poll(struct file *filp,
struct iio_buffer *rb = indio_dev->buffer;
if (!indio_dev->info)
- return -ENODEV;
+ return 0;
poll_wait(filp, &rb->pollq, wait);
if (iio_buffer_ready(indio_dev, rb, rb->watermark, 0))
--
1.9.1
--
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