On Mon, Jan 30, 2023 at 11:35:02PM +0530, Neeraj Sanjay Kale wrote:
> Adds serdev_device_break_ctl() and an implementation for ttyport.
>
> Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@xxxxxxx>
> ---
> drivers/tty/serdev/core.c | 11 +++++++++++
> drivers/tty/serdev/serdev-ttyport.c | 12 ++++++++++++
> include/linux/serdev.h | 6 ++++++
> 3 files changed, 29 insertions(+)
<...>
> +{
> + struct serport *serport = serdev_controller_get_drvdata(ctrl);
> + struct tty_struct *tty = serport->tty;
> +
> + if (!tty->ops->break_ctl)
> + return -ENOTSUPP;
Documentation/dev-tools/checkpatch.rst
429 **ENOTSUPP**
430 ENOTSUPP is not a standard error code and should be avoided in new patches.
431 EOPNOTSUPP should be used instead.
432
433 See: https://lore.kernel.org/netdev/20200510182252.GA411829@xxxxxxx/
Thanks
