Re: Linux 2.6.17: IRQ handler mismatch in serial code?

Alan Cox
2006-06-19T20:52:08Z

Ar Llu, 2006-06-19 am 15:45 -0400, ysgrifennodd Mark Lord:
> If the drivers are written "correctly", they shouldn't grab the IRQ
> until someone actually opens the device. Which means they should be
> able the share the IRQ, so long as both devices are not in use (open)
> at the same time.

This is not the case for ISA bus. Most ISA hardware is physically unable
to share and the drivers for such hardware intentionally grab the IRQ at
load time to avoid it being mis-reused.

Alan