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    Subject[PATCH 3.16.y-ckt 027/133] iio: industrialio-buffer: Fix iio_buffer_poll return value
    Date
    3.16.7-ckt18 -stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Cristina Opriceana <cristina.opriceana@gmail.com>

    commit 1bdc0293901cbea23c6dc29432e81919d4719844 upstream.

    Change return value to 0 if no device is bound since
    unsigned int cannot support negative error codes.

    Fixes: f18e7a068 ("iio: Return -ENODEV for file operations if the
    device has been unregistered")

    Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
    Signed-off-by: Jonathan Cameron <jic23@kernel.org>
    Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
    ---
    drivers/iio/industrialio-buffer.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
    index 9f1a14009901..b8af417e7b93 100644
    --- a/drivers/iio/industrialio-buffer.c
    +++ b/drivers/iio/industrialio-buffer.c
    @@ -96,7 +96,7 @@ 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_data_available(rb))

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