Re: linux-next 2017-08-08 keyboard failure on Nokia N900
From: Pavel Machek
Date: Thu Aug 10 2017 - 13:10:43 EST
Hi!
> >>> I tried today's linux-next. It boots on n900 (up to X), but then my
> >>> screen locks and I can't get back. Touchscreen worked, so my guess is
> >>> keyboard does not...? Ssh connection over usb still works.
> >>
> >> Confirmed, its the keyboard.
> >>
...
> > [ 0.682769] twl4030_madc 48070000.i2c:twl@48:madc: could not
> > request irq
> > [ 0.684051] twl4030_madc: probe of 48070000.i2c:twl@48:madc failed
>
> I've not precisely checked it, but smth is telling me that below
> patch can cause this:
>
> commit 78daaca78ee57dead0f4aa5ee399f0499e81cd9e
...
> int twl4030_init_irq(struct device *dev, int irq_num)
> {
> - static struct irq_chip twl4030_irq_chip;
> + struct irq_chip twl4030_irq_chip;
>
>
> but if we will look at code - it can be seen that this variable is passed by reference to
> irq_set_chip_and_handler().
> Ops. And what will happen when twl4030_init_irq() returns ;)
Thanks, this would take me a while to figure out. I'm testing
next-..-08-10, which should have this fixed... and yes, it does.
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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