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

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Message-ID: <1519657365.10722.187.camel@linux.intel.com>
Date:   Mon, 26 Feb 2018 17:02:45 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     John Garry <john.garry@...wei.com>, gregkh@...uxfoundation.org,
        jslaby@...e.com, p.zabel@...gutronix.de, heiko@...ech.de,
        ed.blake@...drel.com, jhogan@...nel.org
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxarm@...wei.com
Subject: Re: [RFC PATCH 0/2] serial: 8250_dw: IO space + polling mode support

On Mon, 2018-02-26 at 13:15 +0000, John Garry wrote:
> 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).

Is that code already in upstream?

If no, please, Cc next version to me and possible Mika.

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy