On Wednesday 08 January 2014 13:51:17 Thierry Reding wrote: > When devices are probed from the device tree, any interrupts that they > reference are resolved at device creation time. This causes problems if > the interrupt provider hasn't been registered yet at that time, which > results in the interrupt being set to 0. Thanks for looking at this problem, it has bothered a lot of people for a long time. I'm sorry I wasn't there for the discussion in November, but when it came up before, I suggested a different solution that apparently didn't get implemented. > Note that this patch is the easy way out to fix a large part of the > problems for now. A more proper solution for the long term would be to > transition drivers to an API that always resolves resources of any kind > (not only interrupts) at probe time. > > For some background and discussion on possible solutions, see: > > https://lkml.org/lkml/2013/11/22/520 I hope I read this thread correctly, sorry if I missed an important part. My idea was to add the code not in platform_get_irq() but add the resource in platform_drv_probe(), and just bail out with -EPROBE_DEFER there if necessary. We could then skip adding the resources at device creation time. Is this something you already plan to do later, or is there a reason it wouldn't work? In the meantime, I don't see anything with your patch, but it also wouldn't hurt to do it now if it solves all the problems. Arnd -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
