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Subject: Re: [PATCH] MIPS: Lantiq: Fix cascaded IRQ setup
To:     Hauke Mehrtens <hauke@hauke-m.de>,
        James Hogan <james.hogan@imgtec.com>
References: <20170119112822.59445-1-nbd@nbd.name>
 <20170211231906.GI24226@jhogan-linux.le.imgtec.org>
 <073628a4-9c45-b3c3-6caa-c88bea138aa9@hauke-m.de>
Cc:     linux-mips@linux-mips.org, ralf@linux-mips.org, john@phrozen.org
From:   Felix Fietkau <nbd@nbd.name>
Message-ID: <54159608-3adb-071b-9555-f48e2fb3dd22@nbd.name>
Date:   Sun, 12 Feb 2017 12:05:08 +0100
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On 2017-02-12 00:50, Hauke Mehrtens wrote:
> On 02/12/2017 12:19 AM, James Hogan wrote:
>> Hi Felix,
>> 
>> On Thu, Jan 19, 2017 at 12:28:22PM +0100, Felix Fietkau wrote:
>>> With the IRQ stack changes integrated, the XRX200 devices started
>>> emitting a constant stream of kernel messages like this:
>>>
>>> [  565.415310] Spurious IRQ: CAUSE=0x1100c300
>>>
>>> This appears to be caused by IP0 firing for some reason without being
>>> handled. Fix this by setting up IP2-6 as a proper chained IRQ handler and
>>> calling do_IRQ for all MIPS CPU interrupts.
>>>
>>> Cc: john@phrozen.org
>>> Cc: stable@vger.kernel.org
>>> Signed-off-by: Felix Fietkau <nbd@nbd.name>
>> 
>> Is this still applicable after Matt's fix is applied?
>> https://patchwork.linux-mips.org/patch/15110/
> 
> Hi,
> 
> I just tried it without Matt's and Felix's fix and I saw the problem,
> then I applied Matt's fix and the problem was gone.
I still think it should be applied, since it replaces some hacks with
cleaner code.

- Felix