serial: kgdboc: Allow earlycon initialization to be deferred

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Currently there is no guarantee that an earlycon will be initialized
before kgdboc tries to adopt it. Almost the opposite: on systems
with ACPI then if earlycon has no arguments then it is guaranteed that
earlycon will not be initialized.

This patch mitigates the problem by giving kgdboc_earlycon a second
chance during console_init(). This isn't quite as good as stopping during
early parameter parsing but it is still early in the kernel boot.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20200430161741.1832050-1-daniel.thompson@linaro.org
Reviewed-by: Douglas Anderson <dianders@chromium.org>

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Daniel Thompson 2020-04-30 17:17:41 +01:00

parent f71fc3bc7b

commit a4912303ac

1 changed files with 38 additions and 1 deletions

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drivers/tty/serial/kgdboc.c

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