Messages in this thread | | | Date | Tue, 10 Feb 2015 16:00:13 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v4 2/5] irqchip: add virtual demultiplexer implementation |
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On Thu, Jan 29, 2015 at 11:33:37AM +0100, Boris Brezillon wrote: > +#ifdef CONFIG_VIRT_IRQ_DEMUX_CHIP > +/** > + * struct irq_chip_virt_demux - Dumb demultiplexer irq chip data structure
s/Dumb/Virtual/ ?
> + * @domain: irq domain pointer > + * @available: Bitfield of valid irqs > + * @unmasked: Bitfield containing irqs status > + * @flags: irq_virt_demux_flags flags > + * @src_irq: irq feeding the virt demux chip > + * > + * Note, that irq_chip_generic can have multiple irq_chip_type > + * implementations which can be associated to a particular irq line of > + * an irq_chip_generic instance. That allows to share and protect > + * state in an irq_chip_generic instance when we need to implement > + * different flow mechanisms (level/edge) for it.
This seems like a copy/paste from struct irq_chip_generic; it seems not relevant, seeing how irq_chip_virt_demux does not even have an irq_chip_type pointer list.
Also, with a demuxer like this, we're bound to whatever flow type its host is, no?
> +# Dumb interrupt demuxer chip implementation
s/Dumb/Virtual/ ?
> +#ifdef CONFIG_VIRT_IRQ_DEMUX_CHIP > +/** > + * handle_virt_demux_irq - Dumb demuxer irq handle function.
idem
> + * @irq: the interrupt number > + * @desc: the interrupt description structure for this irq > + * > + * Dumb demux interrupts are sent from a demultiplexing interrupt handler
idem
> + * which is not able to decide which child interrupt handler should be > + * called. > + * > + * Note: The caller is expected to handle the ack, clear, mask and > + * unmask issues if necessary. > + */
If we're calling multiple handlers, how can they all do this and not collide?
Over all it looks good -- in as far as my (admittedly stale IRQ braincells) go.
I'll go queue up these bits, if you could send me a delta patch addressing these 'minor' comment issues?
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