Re: [PATCH] Bluetooth: btusb: BTUSB_WAKEUP_DISABLE prevents wake

[Marcel Holtmann]

Hi Abhishek,

> When the BTUSB_WAKEUP_DISABLE flag is set, always return true for
> prevent wake. This tells the suspend notifier not to prepare the
> controller for reconnections during suspend.
> 
> Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx>
> ---
> Realtek chipsets currently lose their firmware when suspending (except
> in autosuspend where they assert remote_wakeup on the usb interface).
> There's no need to configure the Bluetooth stack for wake-up in this
> case so use the BTUSB_WAKEUP_DISABLE flag to also prevent wakeup from
> being configured.
> 
> This was tested on Chromebooks with Realtek chipsets running both 4.14
> and 5.4 kernel. It was tested with suspend functional tests and
> a suspend stress test for 50 iterations.
> 
> drivers/bluetooth/btusb.c | 3 +++
> 1 file changed, 3 insertions(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel