Serial Driver and IRQ0

[Phil Thompson]

The standard Linux serial driver uses an IRQ number of 0 to indicate a port
has no interrupt - but UART0 on a 4xx is on IRQ 0.  Therefore interrupts are
disabled for UART0 (ttyS0).

It's easy enough to hack the standard driver to work around the problem, but
is there a more elegent solution? I can't believe nobody has had to deal
with it before.

Thanks,
Phil

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