openwrtv4/target/linux/generic/patches-3.9/890-8250_optional_sysrq.patch
Felix Fietkau 51b1e8577c kernel: do not accept sysrq characters via serial port
many boards have a disconnected TTL level serial which can generate
some garbage that can lead to spurious false sysrq detects.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 37210
2013-07-09 12:52:00 +00:00

24 lines
633 B
Diff

--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -16,7 +16,7 @@
* membase is an 'ioremapped' cookie.
*/
-#if defined(CONFIG_SERIAL_8250_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#if defined(CONFIG_SERIAL_8250_SYSRQ) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#endif
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -91,6 +91,10 @@ config SERIAL_8250_CONSOLE
If unsure, say N.
+config SERIAL_8250_SYSRQ
+ bool "Magic sysrq support on 8250/16550 devices"
+ depends on SERIAL_8250_CONSOLE
+
config FIX_EARLYCON_MEM
bool
depends on X86