Hi Robin, thanks for your reply. On 01/11/2018 11:47 PM, Robin Murphy wrote: >> >> + for (i = 0; i < iommu->num_irq; i++) { >> + ret = devm_request_irq(iommu->dev, iommu->irq[i], rk_iommu_irq, >> + IRQF_SHARED, dev_name(dev), iommu); > > Why aren't we simply requesting the IRQ once in rk_iommu_probe()? Given > that the hardware doesn't handle multiple translation contexts, there > doesn't seem to be much point in being this dynamic about it. > it make sense, will do it in next version:) > Robin.