This is a note to let you know that I've just added the patch titled
tty/serial: Migrate meson_uart to use has_sysrq
to the 5.4-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-migrate-meson_uart-to-use-has_sysrq.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f88dfceaf7310b7a5879a56a3d6a894504076038
Author: Dmitry Safonov <0x7f454c46@xxxxxxxxx>
Date: Fri Dec 13 00:06:20 2019 +0000
tty/serial: Migrate meson_uart to use has_sysrq
[ Upstream commit dca3ac8d3bc9436eb5fd35b80cdcad762fbfa518 ]
The SUPPORT_SYSRQ ifdeffery is not nice as:
- May create misunderstanding about sizeof(struct uart_port) between
different objects
- Prevents moving functions from serial_core.h
- Reduces readability (well, it's ifdeffery - it's hard to follow)
In order to remove SUPPORT_SYSRQ, has_sysrq variable has been added.
Initialise it in driver's probe and remove ifdeffery.
Cc: Kevin Hilman <khilman@xxxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-amlogic@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Dmitry Safonov <dima@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20191213000657.931618-22-dima@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Stable-dep-of: 2a1d728f20ed ("tty: serial: meson: fix hard LOCKUP on crtscts mode")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index 849ce8c1ef392..4c3616cc00833 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -5,10 +5,6 @@
* Copyright (C) 2014 Carlo Caione <carlo@xxxxxxxxxx>
*/
-#if defined(CONFIG_SERIAL_MESON_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/delay.h>
@@ -716,6 +712,7 @@ static int meson_uart_probe(struct platform_device *pdev)
port->mapsize = resource_size(res_mem);
port->irq = res_irq->start;
port->flags = UPF_BOOT_AUTOCONF | UPF_LOW_LATENCY;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MESON_CONSOLE);
port->dev = &pdev->dev;
port->line = pdev->id;
port->type = PORT_MESON;
