linux-kernel - [PATCH v2 1/7] serial: qcom-geni: fix premature receiver enable

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Message-ID: <20241001125033.10625-2-johan+linaro@kernel.org>
Date: Tue,  1 Oct 2024 14:50:27 +0200
From: Johan Hovold <johan+linaro@...nel.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Jiri Slaby <jirislaby@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Douglas Anderson <dianders@...omium.org>,
	linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org,
	Johan Hovold <johan+linaro@...nel.org>,
	stable@...r.kernel.org,
	Aniket Randive <quic_arandive@...cinc.com>
Subject: [PATCH v2 1/7] serial: qcom-geni: fix premature receiver enable

The receiver should not be enabled until the port is opened so drop the
bogus call to start rx from the setup code which is shared with the
console implementation.

This was added for some confused implementation of hibernation support,
but the receiver must not be started unconditionally as the port may not
have been open when hibernating the system.

Fixes: 35781d8356a2 ("tty: serial: qcom-geni-serial: Add support for Hibernation feature")
Cc: stable@...r.kernel.org	# 6.2
Cc: Aniket Randive <quic_arandive@...cinc.com>
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 drivers/tty/serial/qcom_geni_serial.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 6f0db310cf69..9ea6bd09e665 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1152,7 +1152,6 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport)
 			       false, true, true);
 	geni_se_init(&port->se, UART_RX_WM, port->rx_fifo_depth - 2);
 	geni_se_select_mode(&port->se, port->dev_data->mode);
-	qcom_geni_serial_start_rx(uport);
 	port->setup = true;
 
 	return 0;
-- 
2.45.2