Re: [PATCH] genirq: Check irq disabled & masked states in irq_shutdown

[Brian Norris]

Sorry to respond to myself. Thomas, your reply to another mail in this
series helped me to notice:

On Tue, May 30, 2017 at 04:19:58PM -0700, Brian Norris wrote:
> Side note: for issues like the first problem above, I wonder why there
> isn't a flag that once could pass to request_irq() that suggests the IRQ
> should be initially disabled?

Is that what IRQ_NOAUTOEN is for?

> I know this wouldn't work for shared
> interrupts (but request_irq() could reject that combination, no?)

Hehe, but then I see this, for example, when grepping around:

drivers/usb/dwc3/dwc3-omap.c:

        irq_set_status_flags(omap->irq, IRQ_NOAUTOEN);
        ret = devm_request_threaded_irq(dev, omap->irq, dwc3_omap_interrupt,
                                        dwc3_omap_interrupt_thread, IRQF_SHARED,
                                        "dwc3-omap", omap);

IIUC, that's quite broken, no?

Brian