> Now, the same interrupt pin should cause the comintr(...) isr
 > to be called at priority IPL_SERIAL and the pciio_intr(...)
 > isr to be called at priority IPL_TTY. The comintr(...) function
 > is the generic comport interrupt handler [...] This interrupt
 > handler however, will not clear the pci-interrupt pin - that is
 > controlled by the PCIIO card & driver. [...] The PCIIO driver
 > will clear the interrupt on the PCIIO device once nothing else
 > needs to be dealt with on the PCIIO.

The card's interrupt  pin won't get cleared while IPL_TTY is blocked.
Doesn't this mean that the next com interrupt won't trigger until
then?

Mike

-- 
Michael South
msouth@msouth.org