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Date: Tue, 25 Jun 2013 07:55:12 +0300
From: Johan Hedberg <johan.hedberg@gmail.com>
To: Alex Deymo <deymo@chromium.org>
Cc: Marcel Holtmann <marcel@holtmann.org>,
	linux-bluetooth <linux-bluetooth@vger.kernel.org>,
	keybuk <keybuk@chromium.org>
Subject: Re: [BUG] HCI_RESET and Num_HCI_Command_Packets limit
Message-ID: <20130625045512.GA29467@x220.P-661HNU-F1>
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Hi Alex,

On Mon, Jun 24, 2013, Alex Deymo wrote:
> The timelime for the bug is the following.
> 1. Due a previous "btmgmt power on" we are interacting with the
> bluetooth controller. There are 3 commands queued. The last command
> sent was a HCI_Write_Scan_Enable.

The kernel should only respond to the mgmt_set_powered once *all* HCI
commands are completed. Maybe you're missing the following patch from
your kernel:

commit 229ab39caf8c1321527e408725c1350f7c9aaa84
Author: Johan Hedberg <johan.hedberg@intel.com>
Date:   Fri Mar 15 17:06:53 2013 -0500

    Bluetooth: Wait for HCI command completion with mgmt_set_powered

Johan