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| author | Alexandre Courbot <gnurou@gmail.com> | 2011-02-09 03:18:46 +0000 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2011-03-31 14:33:22 +0900 |
| commit | b2267a6b095afb84b5766d6646e581b9054704d9 (patch) | |
| tree | 1acfe545a09b8ba9fb0c01a30ed465d1be3a9b7f /drivers/tty | |
| parent | ff7690b48ae8571d930a2621e21f6e5a41e42b6d (diff) | |
| download | op-kernel-dev-b2267a6b095afb84b5766d6646e581b9054704d9.zip op-kernel-dev-b2267a6b095afb84b5766d6646e581b9054704d9.tar.gz | |
serial: sh-sci: prevent setup of uninitialized serial console
Commit 906b17dc089f7fa87e37a9cfe6ee185efc90e0da introduced a condition
where the kernel will crash unless a earlyprintk parameter is specified.
Without this parameter, sci_console_init is called during early console
setup without any port being initialized, and the kernel crashes a
little bit later when uart_set_options attemps to invoke set_termios on a
port with an ops member equal to NULL.
This patch just checks in sci_console_init that the port is properly
initialized, and aborts the early console setup if it is not.
Signed-off-by: Alexandre Courbot <gnurou@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index eb7958c..264209c 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1836,6 +1836,12 @@ static int __devinit serial_console_setup(struct console *co, char *options) sci_port = &sci_ports[co->index]; port = &sci_port->port; + /* + * Refuse to handle uninitialized ports. + */ + if (!port->ops) + return -ENODEV; + ret = sci_remap_port(port); if (unlikely(ret != 0)) return ret; |
