Re: [RFC PATCH 0/2] serial: 8250_dw: IO space + polling mode support

[John Garry]

On 26/02/2018 12:27, Andy Shevchenko wrote:
> On Mon, 2018-02-26 at 14:21 +0200, Andy Shevchenko wrote:
> > On Mon, 2018-02-26 at 11:56 +0000, John Garry wrote:
>
>
> > >    Device (LPC0.CON0) {
> > >      Name (_HID, "HISI1031")
>
> > >      // Name (_CID, "PNP0501") // cannot support PNP
>
>
> One more question. What is the problem with this CID? Do you have a race
> condition in enumeration?

Hi Andy,

Not sure if race condition exactly. I tried enabling this CID and a pnp 
device is created in pnpacpi_add_device_handler(), while we have already 
marked the corresponding acpi_device to skip enumeration in ACPI scan 
handler (by flagging it as a serial bus slave).

Thanks,
John