On Wed, Aug 21, 2013 at 7:45 PM, Stephen Warren <swar...@wwwdotorg.org> wrote: > On 08/19/2013 01:21 PM, Stephen Warren wrote: >> On 08/17/2013 08:56 AM, Linus Walleij wrote: >>> We currently defer probing of the caller if a pinctrl GPIO >>> request or direction setting comes in before the range mapping >>> a certain GPIO to a certain pin controller is available. >>> >>> This can end up with a circular dependency: the GPIO driver >>> needs the pin controller to be ready and the pin controller >>> need the GPIO driver to be ready. This also happens if >>> pin controllers and GPIO controllers compiled as modules >>> are inserted in a certain order. >>> >>> To break this circular dependence, queue any GPIO >>> operations coming to the framework until the range is ready, >>> instead of deferring the probe of the caller. >> >> I just noticed that next-20130819 is failing on the Tegra114 Dalmore >> board because of this patch. The kernel log is below. Reverting this >> patch solves the problem > > Linus, any thoughts here?
None whatsoever, but logically it should be that your pinctrl+GPIO driver pair depends on the GPIO driver coming first and having it's probing deferred. I'll rip out that patch for the time being... Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
