Re: [PATCH] Bluetooth: hci_qca: Fix WCN3950 missing regulator release

[Bartosz Golaszewski]

On Tue, 27 Oct 2026 20:36:15 +0100, Stanislavs Nilovs
<valorcool@xxxxxxxxx> said:
> hci_qca driver is missing release of power regulators when module is
> powered off or serial device is removed. This issue is most noticeable
> during system shutdown, since the regulator core is firing a warning
> backtrace that regulator to be freed still has enable_count.
>
> The issue was found with the help of Claude Opus 5 (Anthropic), which
> was asked to review drivers/bluetooth/hci_qca.c for the appearing
> regulator warning backtrace during system shutdown. The fix itself was
> generated by the tool and reviewed by me by applying it, building the
> code and verifying issue is not reproduced anymore.
>
> Tested on real hardware, but not on Linux's master branch. Driver was
> backported to Linux 5.15 for internal testing and this is when the issue
> was noticed.
>
> Fixes: d5712c511cb3 ("Bluetooth: qca: add WCN3950 support")
> Signed-off-by: Stanislavs Nilovs <valorcool@xxxxxxxxx>
> ---

Acked-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>