linux-kernel - Re: [ 056/127] Bluetooth: Fix not removing power

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Date:	Sat, 29 Sep 2012 00:13:03 +0200
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	alan@...rguk.ukuu.org.uk,
	Vinicius Costa Gomes <vinicius.gomes@...nbossa.org>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Subject: Re: [ 056/127] Bluetooth: Fix not removing power_off delayed work

On Fri, 2012-09-28 at 13:33 -0700, Greg Kroah-Hartman wrote:
> 3.0-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Vinicius Costa Gomes <vinicius.gomes@...nbossa.org>
> 
> commit 78c04c0bf52360dc2f7185e99c8e9aa05d73ae5a upstream.
> 
> For example, when a usb reset is received (I could reproduce it
> running something very similar to this[1] in a loop) it could be
> that the device is unregistered while the power_off delayed work
> is still scheduled to run.
[...]
> --- a/net/bluetooth/hci_core.c
> +++ b/net/bluetooth/hci_core.c
> @@ -588,6 +588,8 @@ static int hci_dev_do_close(struct hci_d
>  {
>  	BT_DBG("%s %p", hdev->name, hdev);
>  
> +	cancel_delayed_work(&hdev->power_off);
[...]

This is not right for 3.0 as the type of hdev->power_off is struct
work_struct, not struct delayed_work.

When I looked at this for 3.2 it appeared that this fix might not be
required at all.

Ben.

-- 
Ben Hutchings
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