From mboxrd@z Thu Jan  1 00:00:00 1970
From: linux@arm.linux.org.uk (Russell King - ARM Linux)
Date: Wed, 7 Oct 2015 12:29:14 +0100
Subject: PING: [PATCH v4 TRIVIAL 1/2] ARM: Enable GICv2m on 32-bit virt
 machine
In-Reply-To: <01d701d100ef$a5510870$eff31950$@samsung.com>
References: <017801d100dc$77fe3a90$67faafb0$@samsung.com>
 <20151007102313.GG21513@n2100.arm.linux.org.uk>
 <01d701d100ef$a5510870$eff31950$@samsung.com>
Message-ID: <20151007112913.GI21513@n2100.arm.linux.org.uk>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Wed, Oct 07, 2015 at 02:02:23PM +0300, Pavel Fedin wrote:
>  2/2 from this series has been ACKed and picked up by Marc Zynger. He
> told me that 1/2 is your area of competence.

... which is kind of funny, because all of ARM Ltd's platforms that
have PCIe on the board, and thus might have MSI, the PCIe is non-
functional.  So, until SolidRun sent me an Armada 388 platform a few
weeks back, I had zero MSI platforms, and zero MSI knowledge.

Just because code falls into a particular area of the tree does not
mean that the person who's looking after that area knows everything
inside out - especially when it comes to architecture maintanence
and the code in that subtree covers virtually every technology out
there, and the maintainer is kept functional hardware-starved [*].

Now, the Armada 388 doesn't use the GIC for MSI, but uses its own
interrupt controller.  I haven't yet worked out which bits of the
kernel are being used to provide this functionality yet, but I know
it works.  What I don't want to do is to merge your patch and then
have my one and only MSI platform break because of it, so what I'm
looking for is an assurance that this has had some exposure on
non-GIC MSI platforms, or has been reviewed with this in mind.

We're having far too many regressions of the kind of "let's get X
working on platform Y which then causes platform Z to break".


* - I'm not saying that I want more hardware; I've been out of physical
space for new hardware for some time, and the few extra platforms I've
received recently are having to be stacked on top of each other - which
isn't good when they're bare boards.  It would be nice, however, if the
hardware I did have was fully functional!

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