Re: [REGRESSION] Bluetooth adapter provided by `btusb` not recognized since v6.13.2

[Doug Anderson]

Hi,

On Wed, Nov 19, 2025 at 12:05 AM <incogcyberpunk@xxxxxxxxx> wrote:
>
> I can confirm that reverting the commit `Bluetooth: btusb: mediatek: Add locks for usb_driver_claim_interface()` with the following commit details , solves this regression that has been present in both the stable and the mainline kernels since 6.13.2
>
> Commit Details:
> - Title: Bluetooth: btusb: mediatek: Add locks for usb_driver_claim_interface()
> - commit id: 4194766ec8756f4f654d595ae49962acbac49490
> - [ Upstream commit e9087e828827e5a5c85e124ce77503f2b81c3491 ]
> - Author: Douglas Anderson <dianders@xxxxxxxxxxxx>
> - Date:   Wed Jan 15 19:36:36 2025 -0800
>
> Reverting the above mentioned commit and building the latest mainline kernel without the trouble-causing commit fixes the issue and the bluetooth adapter now is properly recognized and bluetooth works flawlessly.

Hopefully fixed by this commit:

https://lore.kernel.org/r/20251119085354.1.I1ae7aebc967e52c7c4be7aa65fbd81736649568a@changeid

Can you confirm and add your Tested-by in response to that patch if it works?

-Doug