From mboxrd@z Thu Jan  1 00:00:00 1970
From: gregory.clement@free-electrons.com (Gregory CLEMENT)
Date: Fri, 28 Aug 2015 18:08:36 +0200
Subject: no booting due to handle_domain_irq on orion5x/kurobox
In-Reply-To: <20150828155826.GD2776@dinsnail.net> (Michael Weiser's message of
 "Fri, 28 Aug 2015 17:58:26 +0200")
References: <20150828155826.GD2776@dinsnail.net>
Message-ID: <87vbbz75vf.fsf@free-electrons.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi Michael,

Michael Weiser <michael@dinsnail.net> writes:
> Hi,
>
> I've got vanilla kernels running on a Buffalo Linkstation Pro
> (orion5x/Kurobox Pro). The last release kernel to work is 3.17.8.
> Anything after that just says "Uncompressing Linux... Ok. booting the
> kernel" and stops. 
>
> By building and booting various intermediate stages from git, I've
> narrowed it down to the following three commits:
>
> 76ba59f8366f2d9282cb5bda9de75b4b68cbe55f genirq: Add irq_domain-aware core IRQ handler
> a71b092a9c68685a270ebdde7b5986ba8787e575 ARM: Convert handle_IRQ to use __handle_domain_irq
> f4bc9288b4a29ead48425dd7d1bf4b825a8aff58 irqchip: orion: Convert to handle_domain_irq
>
> If I revert those from an otherwise unmodified current
> torvalds/linux.git HEAD it boots up just fine.
>
> I'm afraid that's as far as my kernel debugging know-how will take me.
> Any help in how to proceed further in order to get current kernels
> running on my box would be highly appreciated.

The good new is that a fix have already been submitted, the bad news is
that it won't be in 4.2, but it will be in 4.3-rc1 and as it was tagged
as stable it would be part of the older stable kernel in the next weeks.
You can cherry-pick it from linux-next:

http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=5be9fc23cdb42e1d383ecc8eae8a8ff70a752708

Thanks,

Gregory

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com