linux-kernel - Re: [PATCH] PCI, ACPI: hold acpi_scan

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Message-ID: <CAE9FiQVSZd216JrdHdeLSrr1k0d5xTCmLz9FH151BHDDo8KRAQ@mail.gmail.com>
Date:	Tue, 26 Mar 2013 08:12:30 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-pci@...r.kernel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI, ACPI: hold acpi_scan_lock during root bus hotplug

On Tue, Mar 26, 2013 at 6:24 AM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> On Sunday, March 10, 2013 10:05:16 PM Yinghai Lu wrote:
>> During merging pci tree with pm/acpi tree, Linus noticed that
>> we don't have same lock using patten about acpi pci root as
>> acpiphp.
>>
>> Here apply same lock patten, and we need to change
>> acpi_bus_hot_remove_device executing via acpi_os_hotplug_execute()
>> as it also hold the lock in acpi_bus_hot_remove_device.
>>
>> That will make acpi_bus_hot_remove_device calling the same as other
>> callers.
>>
>> Reported-by: Linus Torvalds <torvalds@...ux-foundation.org>
>> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>> Acked-by: Rafael J. Wysocki <rjw@...k.pl>
>
> Bjorn, this needs to go in before final 3.9.
>
> Are you going to handle it, or should I take care of it?

It should be better via your pm+acpi tree, as that lock is added via your tree.

Thanks

Yinghai
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