Re: [GIT PULL] TTY/Serial driver fixes for 5.5-rc3

[Greg KH <gregkh@linuxfoundation.org>]

On Fri, Dec 20, 2019 at 10:08:03AM -0800, Linus Torvalds wrote:
> On Thu, Dec 19, 2019 at 11:07 PM Greg KH <gregkh@linuxfoundation.org> wrote:
> >
> > The last tty core fix should resolve a long-standing bug with a race
> > at port creation time that some people would see, and Sudip finally
> > tracked down.
> 
> Hmm, looks good. But it makes me wonder if we should now try to remove
> the second call to tty_port_link_device()?
> 
> Now we have a number of helpers that do that tty_port_link_device()
> call for the driver (eg tty_port_register_device_attr_serdev(),
> tty_port_register_device_attr(), and the just added
> uart_add_one_port()).
> 
> But we also have drivers doing it by hand, and presumably we now have
> drivers that do it through multiple paths? I guess it's harmless, but
> it feels a bit odd. No?

It does.  I'll try to look at this after the holidays unless Sudip beats
me to it.

thanks,

greg k-h