snd_gus_interrupt
irqreturn_t snd_gus_interrupt(int irq, void *dev_id);
if (irq >= 0 && request_irq(irq, snd_gus_interrupt, 0, "GUS GF1", (void *) gus)) {
EXPORT_SYMBOL(snd_gus_interrupt);
snd_gus_interrupt(irq, maxcard->gus);
snd_gus_interrupt(irq, iwcard->gus);