Hi Simon
>
> On Fri, Mar 10, 2023 at 11:49:19PM +0530, Neeraj Sanjay Kale wrote:
> > Adds serdev_device_break_ctl() and an implementation for ttyport.
> > This function simply calls the break_ctl in tty layer, which can
> > assert a break signal over UART-TX line, if the tty and the underlying
> > platform and UART peripheral supports this operation.
> >
> > Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@xxxxxxx>
> > ---
> > v3: Add details to the commit message. (Greg KH)
>
> ...
>
> > diff --git a/include/linux/serdev.h b/include/linux/serdev.h index
> > 66f624fc618c..c065ef1c82f1 100644
> > --- a/include/linux/serdev.h
> > +++ b/include/linux/serdev.h
>
> ...
>
> > @@ -255,6 +257,10 @@ static inline int serdev_device_set_tiocm(struct
> > serdev_device *serdev, int set, {
> > return -ENOTSUPP;
> > }
> > +static inline int serdev_device_break_ctl(struct serdev_device
> > +*serdev, int break_state) {
> > + return -EOPNOTSUPP;
>
> Is the use of -EOPNOTSUPP intentional here?
> I see -ENOTSUPP is used elsewhere in this file.
I was suggested to use - EOPNOTSUPP instead of - ENOTSUPP by the check patch scripts and by Leon Romanovsky.
https://patchwork.kernel.org/project/bluetooth/patch/20230130180504.2029440-2-neeraj.sanjaykale@xxxxxxx/
ENOTSUPP is not a standard error code and should be avoided in new patches.
See: https://lore.kernel.org/netdev/20200510182252.GA411829@xxxxxxx/
>
> > +}
> > static inline int serdev_device_write(struct serdev_device *sdev, const
> unsigned char *buf,
> > size_t count, unsigned long
> > timeout) {
> > --
> > 2.34.1
> >
Thanks,
Neeraj
