From 364a6ece62455f669336e50d5b00f14ba650da93 Mon Sep 17 00:00:00 2001
From: Thomas Weber <weber@corscience.de>
Date: Tue, 1 Feb 2011 08:30:41 +0100
Subject: [PATCH] OMAP: Enable Magic SysRq on serial console ttyOx
Magic SysRq key is not working for OMAP on new serial
console ttyOx because SUPPORT_SYSRQ is not defined
for omap-serial.
This patch defines SUPPORT_SYSRQ in omap-serial and
enables handling of Magic SysRq character.
Further there is an issue of losing first break character.
Removing the reset of the lsr_break_flag fixes this issue.
Signed-off-by: Thomas Weber <weber@corscience.de>
Acked-by: Govindraj.R <govindraj.raja@ti.com>
Tested-by: Manjunath G Kondaiah <manjugk@ti.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/tty/serial/omap-serial.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 7f2f01058789a..699b34446a55f 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -20,6 +20,10 @@
* this driver as required for the omap-platform.
*/
+#if defined(CONFIG_SERIAL_OMAP_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
#include <linux/module.h>
#include <linux/init.h>
#include <linux/console.h>
@@ -190,7 +194,6 @@ static inline void receive_chars(struct uart_omap_port *up, int *status)
if (up->port.line == up->port.cons->index) {
/* Recover the break flag from console xmit */
lsr |= up->lsr_break_flag;
- up->lsr_break_flag = 0;
}
#endif
if (lsr & UART_LSR_BI)
--
2.30.2