linux-kernel - Re: [PATCH] ACPI: Enable SCI_EMULATE to manually simulate physical hotplug testing.

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Date:	Tue, 04 Sep 2012 15:54:21 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Ashok Raj <ashok.raj@...el.com>
Subject: Re: [PATCH] ACPI: Enable SCI_EMULATE to manually simulate physical
 hotplug testing.

On Tue, 2012-09-04 at 14:46 -0700, Yinghai Lu wrote:
> On Tue, Sep 4, 2012 at 2:34 PM, Toshi Kani <toshi.kani@...com> wrote:
> > On Tue, 2012-09-04 at 12:17 -0700, Yinghai Lu wrote:
> >  - If a full path is specified in acpi_name, it ignores the arg hsb
> > ("\_SB").
> >  - If a relative path is specified in acpi_name, it appends the arg hsb.
> >
> > So, the code looks good to me; assuming that is the intent.
> >
> > However, the error message below will show up like "\_SB.\_SB.PCIB" when
> > a full path is specified.
> 
> I always use
> echo "\_SB.PCIB 3" > /sys/kernel/debug/acpi/sci_notify
> 
> and it works.
> 
> so assume that function can accept \_SB.PCIB and PCIB both.

I agree.  And that's what I tried to say.


The error message below will be confusing when a (invalid) full path
name is specified, though.

>> +     if (ACPI_FAILURE(status) || ACPI_FAILURE(status1)) {
>> +             pr_err(PREFIX
>> +     "acpi getting handle to <\\_SB.%s> failed inside notify_client
\n",
>> +                     acpi_name);
>> +             return;
>> +     }


Thanks,
-Toshi

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