linux-kernel - Re: [PATCH 6/8] pci: provide sensible irq vector alloc/free routines

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Message-ID: <20160502131124.GA18527@localhost>
Date:	Mon, 2 May 2016 08:11:24 -0500
From:	Bjorn Helgaas <helgaas@...nel.org>
To:	Christoph Hellwig <hch@....de>
Cc:	tglx@...utronix.de, linux-block@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-nvme@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Alexander Gordeev <agordeev@...hat.com>
Subject: Re: [PATCH 6/8] pci: provide sensible irq vector alloc/free routines

On Sun, May 01, 2016 at 08:01:49PM +0200, Christoph Hellwig wrote:
> FYI, I spent some time trying to convert more drivers to this, and
> I think we'll need an additional flag to skip MSI or MSI-X as there
> is plenty of hardware claiming support in the capabilities flag,
> but not actually supporting one of them.

Or maybe add a "pdev->msix_broken" bit and quirks to set it?  Or if
pci_fixup_final quirks merely cleared pdev->msix_cap, I think the PCI
core would never try to enable MSI-X.