linux-kernel - Re: [PATCH 1/2] USB / PM: Don't try to hide PM QoS flags from usb_port_device

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Message-ID: <20130401030347.GC20857@kroah.com>
Date:	Sun, 31 Mar 2013 20:03:47 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Sasha Levin <sasha.levin@...cle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, Dave Jones <davej@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	linux-usb@...r.kernel.org,
	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	Lan Tianyu <tianyu.lan@...el.com>
Subject: Re: [PATCH 1/2] USB / PM: Don't try to hide PM QoS flags from
 usb_port_device_release()

On Mon, Apr 01, 2013 at 12:57:21AM +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> Remove the call to dev_pm_qos_hide_flags(), added by commit 6e30d7cb
> "usb: Add driver/usb/core/(port.c,hub.h) files", from
> usb_port_device_release(), because (1) it is completely unnecessary
> (the flags have been removed already by the PM core during the
> unregistration of the device object) and (2) it triggers a NULL
> pointer dereference in sysfs_find_dirent() (dev->kobj->sd is NULL at
> this point).
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
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