diff options
| author | Felix Fietkau <nbd@nbd.name> | 2016-12-22 08:31:34 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-12 11:51:24 +0100 |
| commit | 732dbf3a6104a3abfcfcd066dcaf89e5054ce009 (patch) | |
| tree | 7bb0dec3e05e2f61365c005e34e536a7d74bfce4 /include/linux/serial_core.h | |
| parent | 552df698e9e88b580039ca715e1b5ad34b6e130b (diff) | |
| download | lwn-732dbf3a6104a3abfcfcd066dcaf89e5054ce009.tar.gz lwn-732dbf3a6104a3abfcfcd066dcaf89e5054ce009.zip | |
serial: do not accept sysrq characters via serial port
many embedded boards have a disconnected TTL level serial which can
generate some garbage that can lead to spurious false sysrq detects.
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/serial_core.h')
| -rw-r--r-- | include/linux/serial_core.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 5def8e830fb0..58484fb35cc8 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -450,7 +450,7 @@ extern void uart_handle_cts_change(struct uart_port *uport, extern void uart_insert_char(struct uart_port *port, unsigned int status, unsigned int overrun, unsigned int ch, unsigned int flag); -#ifdef SUPPORT_SYSRQ +#if defined(SUPPORT_SYSRQ) && defined(CONFIG_MAGIC_SYSRQ_SERIAL) static inline int uart_handle_sysrq_char(struct uart_port *port, unsigned int ch) { |