On Mon, Aug 3, 2015 at 1:37 PM, Cristina Opriceana
<cristina.opriceana@xxxxxxxxx> wrote:
> Change return value to 0 if no device is bound since
> unsigned int cannot support negative error codes.
>
> Signed-off-by: Cristina Opriceana <cristina.opriceana@xxxxxxxxx>
Fixes: f18e7a068 ("iio: Return -ENODEV for file operations if the
device has been unregistered")
> ---
> 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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