Re: [PATCH v3 0/2] Bluetooth: hci_qca: Reopen port after power on for QCA2066

[Bartosz Golaszewski]

On Wed, Oct 28, 2026 at 07:18:37PM +0800, Shuai Zhang wrote:
> QCA2066 needs the serial port reopened after the controller is powered
> on, otherwise the host and the controller run into RTS/CTS
> synchronization issues.
> 
> Patch 1 reopens the port in qca_power_on() for QCA2066, as in v2.
> 
> Patch 2 keeps HCI_UART_PROTO_READY in sync with the port state, so that a
> port which failed to reopen is not closed or flushed again.
> 
> Changes in v3:
>  - Patch 1 is unchanged from v2.
>  - Add patch 2. If serdev_device_open() fails during the reopen, the
>    port stays closed but HCI_UART_PROTO_READY stays set, so the later
>    serdev_device_close() and hci_uart_flush() use a closed port. Keep
>    the flag in sync with the port state and skip the port flush when
>    the port is not open.
>  - Link to v2:
>    https://lore.kernel.org/all/20261016022302.4003647-1-shuai.zhang@xxxxxxxxxxxxxxxx/
> 
> Changes in v2:
>  - Use a separate case for clearer logic.
>  - Link to v1:
>    https://lore.kernel.org/all/20261015092224.262158-1-shuai.zhang@xxxxxxxxxxxxxxxx/
> 
> Shuai Zhang (2):
>   Bluetooth: hci_qca: Reopen port after power on for QCA2066
>   Bluetooth: hci_qca: Don't use the serdev port after a failed reopen
> 
>  drivers/bluetooth/hci_qca.c    | 46 +++++++++++++++++++++++++++++-----
>  drivers/bluetooth/hci_serdev.c |  6 +++--
>  2 files changed, 44 insertions(+), 8 deletions(-)
> 
> -- 
> 2.34.1
>

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