linux-kernel - Re: 4.13.0-rc4 sparc64: can't allocate MSI-X affinity masks for 2 vectors

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Message-ID: <20170822063505.GA6721@lst.de>
Date:   Tue, 22 Aug 2017 08:35:05 +0200
From:   Christoph Hellwig <hch@....de>
To:     David Miller <davem@...emloft.net>
Cc:     mroos@...ux.ee, hch@....de, helgaas@...nel.org,
        sparclinux@...r.kernel.org, linux-pci@...r.kernel.org,
        qla2xxx-upstream@...gic.com, linux-kernel@...r.kernel.org
Subject: Re: 4.13.0-rc4 sparc64: can't allocate MSI-X affinity masks for 2
        vectors

On Mon, Aug 21, 2017 at 01:35:49PM -0700, David Miller wrote:
> I ask because the commit log message indicates that this failure is
> not expected to ever happen on SMP.

I fear my commit message (but not the code) might be wrong.
irq_create_affinity_masks can return NULL any time we don't have any
affinity masks.  I've already had a discussion about this elsewhere
with Bjorn, and I suspect we need to kill the warning or move it
to irq_create_affinity_masks only for genuine failure cases.

> 
> We really need to root cause this.
---end quoted text---