On Fri, Aug 23, 2013 at 9:30 PM, Markus Mayer <markus.mayer@xxxxxxxxxx> wrote:
> I have a follow-up question regarding status reads for each iteration.
> Is this what you are looking for?
>
> for (;;) {
> sta = readl(reg_base + GPIO_INT_STATUS(bank_id)) &
> (~(readl(reg_base + GPIO_INT_MASK(bank_id))));
> if (sta == 0)
> break;
Yes, but follow the design pattern of other drivers such as the
drivers/irqchip/irq-vic.c:
static int handle_one_vic(struct vic_device *vic, struct pt_regs *regs)
{
u32 stat, irq;
int handled = 0;
while ((stat = readl_relaxed(vic->base + VIC_IRQ_STATUS))) {
irq = ffs(stat) - 1;
handle_IRQ(irq_find_mapping(vic->domain, irq), regs);
handled = 1;
}
}
I.e use that nice while-construction.
Yours,
Linus Walleij
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