linux-kernel - RE: [PATCH v2 4/6] ACPI / osi: Fix default

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Date:	Thu, 28 Apr 2016 02:30:26 +0000
From:	"Zheng, Lv" <lv.zheng@...el.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"Chen, Yu C" <yu.c.chen@...el.com>
CC:	Lv Zheng <zetalog@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
	"Brown, Len" <len.brown@...el.com>
Subject: RE: [PATCH v2 4/6] ACPI / osi: Fix default _OSI(Darwin) support

Hi,

> From: linux-acpi-owner@...r.kernel.org [mailto:linux-acpi-
> owner@...r.kernel.org] On Behalf Of Rafael J. Wysocki
> Subject: Re: [PATCH v2 4/6] ACPI / osi: Fix default _OSI(Darwin) support
> 
> On Wednesday, April 27, 2016 09:45:21 AM Chen, Yu C wrote:
> > Hi Lv,
> >
> > > From: Zheng, Lv
> > > Subject: [PATCH v2 4/6] ACPI / osi: Fix default _OSI(Darwin) support
> > >
> > > From: Chen Yu <yu.c.chen@...el.com>
> > >
> > > The following commit always reports positive value when Apple hardware
> > > queries _OSI("Darwin"):
> > >  Commit: 7bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334
> > >  Subject: ACPI: Support _OSI("Darwin") correctly However since this
> > > implementation places the judgement in runtime, it breaks
> acpi_osi=!Darwin
> > > and cannot return unsupported for _OSI("WinXXX") invoked before invoking
> > > _OSI("Darwin").
> > >
> > > This patch fixes the issues by reverting the wrong support and implementing
> > > the default behavior of _OSI("Darwin")/_OSI("WinXXX") on Apple hardware
> via
> > > DMI matching.
> > >
> > > Fixes: 7bc5a2bad0b8 ("ACPI: Support _OSI("Darwin") correctly")
> > > Cc: <stable@...r.kernel.org> # 3.18+
> > > Link: https://bugzilla.kernel.org/show_bug.cgi?id=92111
> > > Reported-by: Lukas Wunner <lukas@...ner.de>
> > > Signed-off-by: Chen Yu <yu.c.chen@...el.com>
> > > Signed-off-by: Lv Zheng <lv.zheng@...el.com>
> > > ---
> > >  drivers/acpi/blacklist.c |   23 ++++++++++++++++++
> > >  drivers/acpi/osl.c       |   58
> ++++++++++++++++++++++++++++++++++++++++---
> > > ---
> > >  include/linux/acpi.h     |    1 +
> > >  3 files changed, 75 insertions(+), 7 deletions(-)
> > >
> > > diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c index
> > > 96809cd..e947d3e 100644
> > > --- a/drivers/acpi/blacklist.c
> > > +++ b/drivers/acpi/blacklist.c
> > > @@ -133,6 +133,11 @@ int __init acpi_blacklisted(void)
> > >  	return blacklisted;
> > >  }
> > >  #ifdef CONFIG_DMI
> > > +static int __init dmi_enable_osi_darwin(const struct dmi_system_id *d)
> > > +{
> > > +	acpi_dmi_osi_darwin(1, d);	/* enable */
> > > +	return 0;
> > > +}
> > >  static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)  {
> > >  	acpi_dmi_osi_linux(1, d);	/* enable */
> > > @@ -331,6 +336,24 @@ static struct dmi_system_id acpi_osi_dmi_table[]
> > > __initdata = {
> > >  		},
> > >  	},
> > >
> > > +	/*
> > > +	 * Enable _OSI("Darwin") for all apple platforms.
> > > +	 */
> > > +	{
> > > +	.callback = dmi_enable_osi_darwin,
> > > +	.ident = "Apple hardware",
> > > +	.matches = {
> > > +		     DMI_MATCH(DMI_SYS_VENDOR, "Apple INC."),
> > > +		},
> > > +	},
> > > +	{
> > > +	.callback = dmi_enable_osi_darwin,
> > > +	.ident = "Apple hardware",
> > > +	.matches = {
> > > +		     DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, INC."),
> > > +		},
> > > +	},
> > > +
> > The  vendor id should be 'Apple Inc.' and 'Apple Computer, Inc.' instead.
> 
> If this is the only problem with this patch, I can fix it up.  No need to resend.
[Lv Zheng] 
This is the only problem.
Thanks for the help.

Best regards
-Lv

> 
> Thanks,
> Rafael
> 
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