Re: [PATCH v2] Bluetooth: btusb: Reset port on cmd timeout

Hi Abhishek,

QCA_ROME sometimes gets into a state where it is unresponsive to
commands. Since it doesn't have support for a reset gpio, reset the usb
port when this occurs instead.

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
---
On Chromebooks with this chipset, we encountered cmd_timeout after
running suspend stress test for hundreds of iterations. Without
a recovery mechanism, continued cmd_timeout failures eventually caused
the suspend stress test to fail.

This change will just reset the port that the Bluetooth chip is on when
cmd_timeout is encountered. At the very least, the driver will unload
and stop affecting suspend. It doesn't seem to restore the BT controller
to a good state however (this still requires a power cycle).

Changes in v2:
- Renamed btusb_generic_usb_cmd_timeout to btusb_qca_cmd_timeout
- Updated commit note

drivers/bluetooth/btusb.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel