IRQ Interrupt ReQuest 中断请求 ; 中断 ; 中断请求信号
F-IRQ Frequency Interrupt Request 频率中断请求信号
interrupt request irq 外部中断请求
IRQ interrupt IRQ中断
This helps the kernel IRQ layer clearly identify which driver is handling that particular interrupt.
这样可以帮助内核的 IRQ 层清楚地识别出哪个驱动程序正在处理那个特定的中断。
By default, the driver IRQ routine should return IRQ_HANDLED as it is a bug to return IRQ_NONE when the driver has actually handled that interrupt.
缺省情况下，驱动程序IR Q例程应该返回IRQ_HANDLED，当驱动程序正在处理那个中断时却返回了IRQ_NONE，说明存在bug。
This change, introduced by Linus, means that the interrupt handlers tell the generic IRQ layer whether the interrupt is really meant for it or not.
这个由Linus引入的变化意味着中断处理程序告诉通用的IR q层是否真的要中断。
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