irqreturn_t wl3501_interrupt (int irq, void * dev_id, struct pt_regs * regs);
irq - Interrupt number dev_id - net_device regs - registers
We must acknowledge the interrupt as soon as possible, and block the interrupt from the same card immediately to prevent re-entry.
Before accessing the Control_Status_Block, we must lock SUTRO first. On the other hand, to prevent SUTRO from malfunctioning, we must unlock the SUTRO as soon as possible.