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

[Shuai Zhang]

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