kernel: do not accept sysrq characters via serial port
authorFelix Fietkau <nbd@openwrt.org>
Tue, 9 Jul 2013 12:52:00 +0000 (12:52 +0000)
committerFelix Fietkau <nbd@openwrt.org>
Tue, 9 Jul 2013 12:52:00 +0000 (12:52 +0000)
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

target/linux/generic/config-3.10
target/linux/generic/config-3.8
target/linux/generic/config-3.9
target/linux/generic/patches-3.10/890-8250_optional_sysrq.patch [new file with mode: 0644]
target/linux/generic/patches-3.8/890-8250_optional_sysrq.patch [new file with mode: 0644]
target/linux/generic/patches-3.9/890-8250_optional_sysrq.patch [new file with mode: 0644]

index ed53b57..4ad44f3 100644 (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
index 379aa65..4164192 100644 (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
index ab0e986..515c3e9 100644 (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
diff --git a/target/linux/generic/patches-3.10/890-8250_optional_sysrq.patch b/target/linux/generic/patches-3.10/890-8250_optional_sysrq.patch
new file mode 100644 (file)
index 0000000..fcfffbb
--- /dev/null
@@ -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
diff --git a/target/linux/generic/patches-3.8/890-8250_optional_sysrq.patch b/target/linux/generic/patches-3.8/890-8250_optional_sysrq.patch
new file mode 100644 (file)
index 0000000..1748a04
--- /dev/null
@@ -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
diff --git a/target/linux/generic/patches-3.9/890-8250_optional_sysrq.patch b/target/linux/generic/patches-3.9/890-8250_optional_sysrq.patch
new file mode 100644 (file)
index 0000000..fcfffbb
--- /dev/null
@@ -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