netdev - RE: [PATCH 5/5] PCI: remove pci_enable

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Date:   Mon, 27 Mar 2017 15:03:30 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Christoph Hellwig' <hch@....de>
CC:     "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "netanel@...apurnalabs.com" <netanel@...apurnalabs.com>,
        "jcliburn@...il.com" <jcliburn@...il.com>,
        "chris.snook@...il.com" <chris.snook@...il.com>,
        "sgoutham@...ium.com" <sgoutham@...ium.com>,
        "rric@...nel.org" <rric@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: RE: [PATCH 5/5] PCI: remove pci_enable_msix

From: 'Christoph Hellwig'
> Sent: 27 March 2017 15:52
> On Mon, Mar 27, 2017 at 02:06:45PM +0000, David Laight wrote:
> > Apart from all the 'out of tree' drivers that will need
> > fixing and a conditional compile added.
> 
> That has never been a reason for stopping linux kernel changes.

I'm aware of that, but sometimes you just make life hard.

> Never mind that your out of tree drivers should probably never have used
> this function anyway, but pci_enable_msix_{exact,range} which would have
> been the better choice even before pci_alloc_irq_vectors.

Indeed, but pci_enable_msix_range() only appeared in 3.14.
We have to support a wide range of kernels.
I think we've finally managed to get most of our customers off 2.6.18.

	David