Re: gpio irqchip initialization race

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Apr 1, 2016 at 10:43 AM, Linus Walleij <linus.walleij@xxxxxxxxxx> wrote:

> I think the problem is that gpio-keys is calling gpio_to_irq(), and at that
> point between gpiochip_add_data() but before gpiochip_irqchip_add()
> it gets a bogus IRQ when it should be getting -EPROBE_DEFER.

Or not a bogus irqnumber really, it get -ENXIO (-6)
as in your example:

> gpio-keys user_sw: Unable to get irq number for GPIO 376, error -6

And in this case (if gpio_keys handle -EPROBE_DEFER gracefully)
all should be fine with my oneliner patch.

I am more uncertain about the -EINVAL (-22) we might need some
more analysis there.

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-gpio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux SPI]     [Linux Kernel]     [Linux ARM (vger)]     [Linux ARM MSM]     [Linux Omap]     [Linux Arm]     [Linux Tegra]     [Fedora ARM]     [Linux for Samsung SOC]     [eCos]     [Linux Fastboot]     [Gcc Help]     [Git]     [DCCP]     [IETF Announce]     [Security]     [Linux MIPS]     [Yosemite Campsites]

  Powered by Linux