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authorFelix Fietkau <nbd@openwrt.org>2013-07-09 12:52:00 +0000
committerFelix Fietkau <nbd@openwrt.org>2013-07-09 12:52:00 +0000
commit51b1e8577c8edc2108060d5e5e81db41c81b1081 (patch)
treec418fcd7cc30ddf9a7f4908982c168ebf54d2485 /target/linux/generic/patches-3.9
parentd0d268ba6e313a1e1ea432f8a4568e15fccded45 (diff)
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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
Diffstat (limited to 'target/linux/generic/patches-3.9')
-rw-r--r--target/linux/generic/patches-3.9/890-8250_optional_sysrq.patch24
1 files changed, 24 insertions, 0 deletions
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
index 0000000000..fcfffbb668
--- /dev/null
+++ b/target/linux/generic/patches-3.9/890-8250_optional_sysrq.patch
@@ -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