On Tue, Mar 28, 2017 at 05:59:31PM +0200, Sebastian Reichel wrote:
> Add method, which waits until the transmission buffer has been sent.
> Note, that the change in ttyport_write_wakeup is related, since
> tty_wait_until_sent will hang without that change.
>
> Acked-by: Rob Herring <robh@xxxxxxxxxx>
> Acked-by: Pavel Machek <pavel@xxxxxx>
> Signed-off-by: Sebastian Reichel <sre@xxxxxxxxxx>
> ---
> Changes since PATCHv2:
> * Avoid goto in ttyport_write_wakeup
> ---
> drivers/tty/serdev/core.c | 11 +++++++++++
> drivers/tty/serdev/serdev-ttyport.c | 18 ++++++++++++++----
> include/linux/serdev.h | 3 +++
> 3 files changed, 28 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
> index f4c6c90add78..a63b74031e22 100644
> --- a/drivers/tty/serdev/core.c
> +++ b/drivers/tty/serdev/core.c
> @@ -173,6 +173,17 @@ void serdev_device_set_flow_control(struct serdev_device *serdev, bool enable)
> }
> EXPORT_SYMBOL_GPL(serdev_device_set_flow_control);
>
> +void serdev_device_wait_until_sent(struct serdev_device *serdev, long timeout)
> +{
> + struct serdev_controller *ctrl = serdev->ctrl;
> +
> + if (!ctrl || !ctrl->ops->wait_until_sent)
> + return;
> +
> + ctrl->ops->wait_until_sent(ctrl, timeout);
> +}
> +EXPORT_SYMBOL_GPL(serdev_device_wait_until_sent);
Is this still needed now that we have serdev_device_write() with an
unlimited timeout available?
thanks,
greg k-h
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