linux-kernel - Re: [PATCH] of/irq: Fix msi-map calculation for nonzero rid-base

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Message-ID: <CAL_JsqLScMdfUAtMPDGWphc_PZp4K-c0MfjRZh9G7=A9pLZu9Q@mail.gmail.com>
Date:	Thu, 11 Feb 2016 17:15:27 -0600
From:	Rob Herring <robh+dt@...nel.org>
To:	Marc Zyngier <marc.zyngier@....com>
Cc:	Robin Murphy <robin.murphy@....com>,
	Frank Rowand <frowand.list@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Mark Rutland <mark.rutland@....com>,
	David Daney <david.daney@...ium.com>, stuart.yoder@....com,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	stable <stable@...r.kernel.org>
Subject: Re: [PATCH] of/irq: Fix msi-map calculation for nonzero rid-base

On Thu, Feb 11, 2016 at 5:04 AM, Marc Zyngier <marc.zyngier@....com> wrote:
> On 09/02/16 11:04, Robin Murphy wrote:
>> The existing msi-map code is fine for shifting the entire RID space
>> upwards, but attempting finer-grained remapping reveals a bug. It turns
>> out that we are mistakenly treating the msi-base part as an offset, not
>> as a new base to remap onto, so things get squiffy when rid-base is
>> nonzero. Fix this, and at the same time add a sanity check against
>> having msi-map-mask clash with a nonzero rid-base, as that's another
>> thing one can easily get wrong.
>>
>> CC: <stable@...r.kernel.org>
>> Signed-off-by: Robin Murphy <robin.murphy@....com>
>
> Rob, Frank,
>
> Are you willing to take this one through the OF tree? Or should we route
> it through the IRQ tree? It'd be good if it make it into 4.5.

Applied for 4.5. ATM, I don't have anything else to send to Linus.
I'll give it a week or so if this is not urgent. Or send me a bunch of
DT binding fixes and you can get it in sooner. ;)

Rob