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kernel: do not accept sysrq characters via serial port

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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
This commit is contained in:
Felix Fietkau 2013-07-09 12:52:00 +00:00
parent d0d268ba6e
commit 51b1e8577c
6 changed files with 75 additions and 0 deletions
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1
target/linux/generic/config-3.10
View file

@ -2886,6 +2886,7 @@ CONFIG_SERIAL_8250_NR_UARTS=2
# CONFIG_SERIAL_8250_PCI is not set
# CONFIG_SERIAL_8250_RSA is not set
CONFIG_SERIAL_8250_RUNTIME_UARTS=2
# CONFIG_SERIAL_8250_SYSRQ is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_ARC is not set

1
target/linux/generic/config-3.8
View file

@ -2817,6 +2817,7 @@ CONFIG_SERIAL_8250_NR_UARTS=2
# CONFIG_SERIAL_8250_PCI is not set
# CONFIG_SERIAL_8250_RSA is not set
CONFIG_SERIAL_8250_RUNTIME_UARTS=2
# CONFIG_SERIAL_8250_SYSRQ is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_ARC is not set

1
target/linux/generic/config-3.9
View file

@ -2859,6 +2859,7 @@ CONFIG_SERIAL_8250_NR_UARTS=2
# CONFIG_SERIAL_8250_PCI is not set
# CONFIG_SERIAL_8250_RSA is not set
CONFIG_SERIAL_8250_RUNTIME_UARTS=2
# CONFIG_SERIAL_8250_SYSRQ is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_ARC is not set

24
target/linux/generic/patches-3.10/890-8250_optional_sysrq.patch Normal file
View file

@ -0,0 +1,24 @@
--- 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

24
target/linux/generic/patches-3.8/890-8250_optional_sysrq.patch Normal file
View file

@ -0,0 +1,24 @@
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -74,6 +74,10 @@ 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
--- a/drivers/tty/serial/8250/8250.c
+++ b/drivers/tty/serial/8250/8250.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

24
target/linux/generic/patches-3.9/890-8250_optional_sysrq.patch Normal file
View file

@ -0,0 +1,24 @@
--- 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