linux-kernel - Re: [PATCH 0/2] driver core / ACPI: Avoid device removal locking problems

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Message-ID: <1377709595.10300.858.camel@misato.fc.hp.com>
Date:	Wed, 28 Aug 2013 11:06:35 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Tejun Heo <tj@...nel.org>, Gu Zheng <guz.fnst@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
Subject: Re: [PATCH 0/2] driver core / ACPI: Avoid device removal locking
 problems

On Wed, 2013-08-28 at 15:45 +0200, Rafael J. Wysocki wrote:
> Hi All,
> 
> The following two patches are to address possible deadlocks related to
> device removal and device sysfs attribute access.  In short, some device
> sysfs attribute callbacks need to acquire locks that are also held around
> device removal and that may lead to deadlocks with s_active draining in
> sysfs_deactivate().
> 
> [1/2] Avoid possible device removal deadlocks related to device_hotplug_lock.
> [2/2] Rework the handling of containers by ACPI hotplug (which makes a possible
>       device removal deadlock related to acpi_scan_lock go away).

I like the simplicity of this version. :-)  I also agree to remove the
eject_pending flag.  For the series:

Acked-by: Toshi Kani <toshi.kani@...com>

Thanks,
-Toshi

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