ACPI: SPCR: Consider baud rate 0 as preconfigured state

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[ Upstream commit b413b1abeb ]

Since SPCR 1.04 [1] the baud rate of 0 means a preconfigured state of UART.
Assume firmware or bootloader configures console correctly.

[1]: https://docs.microsoft.com/en-us/windows-hardware/drivers/serports/serial-port-console-redirection-table

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Andy Shevchenko 2018-11-21 15:43:37 +02:00 • committed by Greg Kroah-Hartman

parent c22be94a55

commit f1d84e3c45

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drivers/acpi/spcr.c

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