linux-kernel - Re: 2.6.39-rc2 regression: X201s fails to resume b77dcf8460ae57d4eb9fd3633eb4f97b8fb20716

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Message-ID: <20110411173409.1567679c@lxorguk.ukuu.org.uk>
Date:	Mon, 11 Apr 2011 17:34:09 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Vinicius Costa Gomes <vinicius.gomes@...nbossa.org>
Cc:	Keith Packard <keithp@...thp.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-bluetooth@...r.kernel.org
Subject: Re: 2.6.39-rc2 regression: X201s fails to resume
 b77dcf8460ae57d4eb9fd3633eb4f97b8fb20716

> I took a shot at it and just sent a patch (also attached for convenience) 
> that should solve the problem.

Well its reverting too much but its also looking pretty bogus to me

-	/* Stop timer, it might be running */
-	del_timer_sync(&hdev->cmd_timer);
-
 	if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
 		hci_req_unlock(hdev);
 		return 0;

So you've now got a path where you leave the timer running and didn't
before - not it appears one that is a good idea.

Certainly not the kind of change that should be considered for a
regression fix for an rc kernel. It's far too big a behavioural change to
be safe.

Alan
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