On 06/21/2016, 05:19 PM, Matthew Leach wrote:
> When using the 8250 as a boot console and the main console results in
> messages being printed twice. The console framework will only
> unregister boot consoles if a new console is registered with the
> CON_CONSDEV flag set.
>
> Set this flag for the univ8250 console to prevent double-registration.
>
> Signed-off-by: Matthew Leach <matthew.leach@xxxxxxxxxxxxxxx>
> ---
> drivers/tty/serial/8250/8250_core.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
> index 2f4f5ee..7a7453d 100644
> --- a/drivers/tty/serial/8250/8250_core.c
> +++ b/drivers/tty/serial/8250/8250_core.c
> @@ -675,7 +675,7 @@ static struct console univ8250_console = {
> .device = uart_console_device,
> .setup = univ8250_console_setup,
> .match = univ8250_console_match,
> - .flags = CON_PRINTBUFFER | CON_ANYTIME,
> + .flags = CON_PRINTBUFFER | CON_ANYTIME | CON_CONSDEV,
This patch breaks console= parameter handling. Passing:
console=ttyS0 console=tty0
no longer means /dev/console is tty0 and it should be as is documented.
I have not investigated further yet.
thanks,
--
js
suse labs
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