linux-kernel - RE: [PATCH] pci-hyperv: Use only 16 bit integer for PCI domain

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Message-ID: <BLUPR03MB1412AD9B6C5B4575F354EC4CCAFE0@BLUPR03MB1412.namprd03.prod.outlook.com>
Date:   Wed, 24 May 2017 20:43:08 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     Haiyang Zhang <haiyangz@...rosoft.com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
CC:     KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "olaf@...fle.de" <olaf@...fle.de>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        "driverdev-devel@...uxdriverproject.org" 
        <driverdev-devel@...uxdriverproject.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] pci-hyperv: Use only 16 bit integer for PCI domain



> -----Original Message-----
> From: Haiyang Zhang [mailto:haiyangz@...hange.microsoft.com]
> Sent: Wednesday, May 24, 2017 4:39 PM
> To: bhelgaas@...gle.com; linux-pci@...r.kernel.org
> Cc: Haiyang Zhang <haiyangz@...rosoft.com>; KY Srinivasan
> <kys@...rosoft.com>; Stephen Hemminger <sthemmin@...rosoft.com>;
> olaf@...fle.de; vkuznets@...hat.com; driverdev-
> devel@...uxdriverproject.org; linux-kernel@...r.kernel.org
> Subject: [PATCH] pci-hyperv: Use only 16 bit integer for PCI domain
> 
> [This sender failed our fraud detection checks and may not be who they
> appear to be. Learn about spoofing at http://aka.ms/LearnAboutSpoofing]
> 
> From: Haiyang Zhang <haiyangz@...rosoft.com>
> 
> This patch uses the lower 16 bits of the serial number as PCI
> domain, otherwise some drivers may not be able to handle it.
> 
> Besides Nvidia drivers, we also found X.org, and DPDK handle
> only 16 bit PCI domain.
> 
> Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
> ---

According to Stephen Hemminger <sthemmin@...rosoft.com>, there are
additional programs, like X.org, DPDK, are also using 16-bit only
PCI domain numbers. So, I'm submitting this patch for re-consideration.

Thanks,
- Haiyang