forked from luck/tmp_suning_uos_patched
tty/serial: fix 8250 early console option passing to regular console
In the conversion to generic early console, the passing of options from the early 8250 console to the regular ttyS console was broken. This resulted in the baud rate changing when switching consoles during boot. This feature allows specifying a single console option on the kernel command line rather than both an early console and regular serial tty console. It would be nice to generalize this feature. However, it only works if the correct baud rate can be probed early which is not the case on many platforms which have non-standard UART clock rates. So for now, this is left as an 8250 specific feature. Reported-and-tested-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Rob Herring <robh@kernel.org> Cc: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -144,8 +144,11 @@ static int __init early_serial8250_setup(struct earlycon_device *device,
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if (!(device->port.membase || device->port.iobase))
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return 0;
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if (!device->baud)
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if (!device->baud) {
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device->baud = probe_baud(&device->port);
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snprintf(device->options, sizeof(device->options), "%u",
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device->baud);
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}
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init_port(device);
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@ -25,7 +25,7 @@
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#include <asm/serial.h>
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static struct console early_con = {
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.name = "earlycon",
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.name = "uart", /* 8250 console switch requires this name */
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.flags = CON_PRINTBUFFER | CON_BOOT,
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.index = -1,
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};
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