Re: [PATCH v1] serial: qcom_geni: Fix BT failure regression on RB2 platform

[Greg Kroah-Hartman]

On Wed, Jan 07, 2026 at 12:18:34PM +0530, Praveen Talari wrote:
> A regression in linux-next causes Bluetooth functionality to fail during
> bootup on the RB2 platform, preventing proper BT initialization. However,
> BT works correctly after bootup completes.
> 
> The issue occurs when runtime PM is enabled and uart_add_one_port() is
> called before wakeup IRQ setup. The uart_add_one_port() call activates the
> device through runtime PM, which configures GPIOs to their default state.
> When wakeup IRQ registration happens afterward, it conflicts with these
> GPIO settings, causing state corruption that breaks Bluetooth
> functionality.
> 
> Fix this by moving runtime PM enablement and uart_add_one_port() after
> wakeup IRQ registration, ensuring proper initialization order.
> 
> Reported-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>
> Closes:
> https://lore.kernel.org/all/20251110101043.2108414-4-praveen.talari@xxxxxxxxxxxxxxxx/

No line wrapping for tags please.

thanks,

greg k-h