Re: [PATCH] Revert "Bluetooth: Enable autosuspend for Intel Bluetooth device"

[Gustavo Padovan <gustavo@padovan.org>]

Hi Marcel,

2014-04-22 Marcel Holtmann <marcel@holtmann.org>:

> This reverts commit d2bee8fb6e18f6116aada39851918473761f7ab1.
> 
> Enabling autosuspend for Intel Bluetooth devices has been shown to not
> work reliable. It does work for some people with certain combinations
> of USB host controllers, but for others it puts the device to sleep and
> it will not wake up for any event.
> 
> These events can be important ones like HCI Inquiry Complete or HCI
> Connection Request. The events will arrive as soon as you poke the
> device with a new command, but that is not something we can do in
> these cases.
> 
> Initially there were patches to the xHCI USB controller that fixed
> this for some people, but not for all. This could be well a problem
> somewhere in the USB subsystem or in the USB host controllers or
> just plain a hardware issue somewhere. At this moment we just do
> not know and the only safe action is to revert this patch.
> 
> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
> Cc: Tedd Ho-Jeong An <tedd.an@intel.com>
> Cc: stable@vger.kernel.org
> ---
>  drivers/bluetooth/btusb.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)

Patch has been applied to bluetooth.git. Thanks.

	Gustavo