linux-kernel - Re: [PATCH v2 0/8] Raspberry Pi 2 support.

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Date:	Sat, 26 Dec 2015 22:38:05 +0100
From:	Noralf Trønnes <noralf@...nnes.org>
To:	Eric Anholt <eric@...olt.net>,
	Alexander Aring <alex.aring@...il.com>,
	Phil <phil@...pberrypi.org>
Cc:	Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org,
	Florian Fainelli <f.fainelli@...il.com>,
	Jason Cooper <jason@...edaemon.net>,
	Scott Branden <sbranden@...adcom.com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Marc Zyngier <marc.zyngier@....com>,
	Ray Jui <rjui@...adcom.com>, linux-kernel@...r.kernel.org,
	Rob Herring <robh+dt@...nel.org>,
	bcm-kernel-feedback-list@...adcom.com,
	linux-rpi-kernel@...ts.infradead.org,
	Kumar Gala <galak@...eaurora.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 0/8] Raspberry Pi 2 support.


Den 22.12.2015 20:01, skrev Eric Anholt:

>
>> After finally booting the RPi2 I get several messages of:
>>
>> unexpected IRQ trap at vector 00
>>
>> while typing _one_ character over uart.
> We were doing some debugging of that recently.  It seems that every once
> in a while we get woken up but nothing shows up in the top-level status
> register.  We need to just make the irqchip ignore instead of trying to
> look up a handler in that case, but I haven't prioritized it because it
> makes me worry that I'm just papering over a problem in our IRQ masking
> or something.
>
> I haven't seen any problems other than the printk, though.

Downstream has this patch[1]:
irq-bcm2836: Prevent spurious interrupts, and trap them early

It has been used in the nightly build of OpenELEC[2] for 5 days now without
any complaints (used with the downstream ARCH_BCM2709).

[1] 
https://github.com/raspberrypi/linux/commit/688a5f2ada4fbd16547b574a17e6d359ab2364d0
[2] http://forum.kodi.tv/showthread.php?tid=250817&pid=2192054#pid2192054

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