This is a note to let you know that I've just added the patch titled tty: serial: qcom-geni-serial: stop operations in progress at shutdown to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tty-serial-qcom-geni-serial-stop-operations-in-progr.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit a9b64eb040aa8e32f707de41837ac46341fc12fc Author: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx> Date: Thu Dec 29 16:50:17 2022 +0100 tty: serial: qcom-geni-serial: stop operations in progress at shutdown [ Upstream commit d8aca2f96813d51df574a811eda9a2cbed00f261 ] We don't stop transmissions in progress at shutdown. This is fine with FIFO SE mode but with DMA (support for which we'll introduce later) it causes trouble so fix it now. Fixes: e83766334f96 ("tty: serial: qcom_geni_serial: No need to stop tx/rx on UART shutdown") Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx> Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> Link: https://lore.kernel.org/r/20221229155030.418800-2-brgl@xxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index ce1c81731a2a8..e5ca3c3c27d21 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -893,6 +893,8 @@ static int setup_fifos(struct qcom_geni_serial_port *port) static void qcom_geni_serial_shutdown(struct uart_port *uport) { disable_irq(uport->irq); + qcom_geni_serial_stop_tx(uport); + qcom_geni_serial_stop_rx(uport); } static int qcom_geni_serial_port_setup(struct uart_port *uport)