On Sat, 17 Apr 2010 13:35:50 -0400
Fr__d__ric Bri__re <fbriere@fbriere.net> wrote:

quoted text
> Our main concern is that this driver would be rejected by the kernel
> maintainers, due to the fact that it busy-waits with interrupts
> disabled, for up to 32ms (in the very worst and unlikely case).
> Although I have found similar instances in the kernel tree, none of them
> disabled interrupts for as long as this.  (The longest was 5ms, by
> rs_put_char() in drivers/serial/68328serial.c.)  Unfortunately, this is
> the only way to achieve the precise timing required.
> 

Worse is that there is a potential infinite loop with all interrupts
blocked in cbm_raw_write().

It's a pity that Linux doesn't allowing blocking single interrupts, like
that various BSDs out there.

--
Gary Jennejohn
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