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From: Ron Murray <rjmx@rjmx.net>
To: linux-pci@vger.kernel.org
Subject: PCI device appears intermittently
Date: Thu, 28 Mar 2019 21:22:03 -0400	[thread overview]
Message-ID: <06ca8af7-46e3-2769-cce0-48596ce99211@rjmx.net> (raw)


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I have an ASRock 970A-G/3.1 motherboard, which, with current Linux
kernels, occasionally "finds" an extra PCI device on the initial scan. I
wouldn't mind, but it finds it early in the piece, and that changes the
PCI allocation of my Ethernet board from 02:06.0 to 03:06.0, and, with
systemd, Linux comes up with no network connection. A reboot fixes it,
mostly.

Here's the first few lines of 'lspci' when Linux doesn't find the extra device

> 00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI]
> RD9x0/RX980 Host Bridge (rev 02) 00:00.2 IOMMU: Advanced Micro
> Devices, Inc. [AMD/ATI] RD890S/RD990 I/O Memory Management Unit
> (IOMMU) 00:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI]
> RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GFX port 0) 00:11.0
> SATA controller: Advanced Micro Devices, Inc. [AMD/ATI]
> SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] (rev 40) 

and here's the same thing when it does:

> 00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI]
> RD9x0/RX980 Host Bridge (rev 02) 00:00.2 IOMMU: Advanced Micro
> Devices, Inc. [AMD/ATI] RD890S/RD990 I/O Memory Management Unit
> (IOMMU) 00:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI]
> RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GFX port 0) 00:09.0
> PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980
> PCI to PCI bridge (PCI Express GPP Port 4) 00:11.0 SATA controller:
> Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA
> Controller [AHCI mode] (rev 40) 00:12.0 USB controller: Advanced Micro
> Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller 

The 00:09.0 device is the extra one. Anything else I can provide to assist?

 Thanks,


 .....Ron

-- 
Ron Murray <rjmx@rjmx.net>
PGP Fingerprint: 4D99 70E3 2317 334B 141E  7B63 12F7 E865 B5E2 E761



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             reply	other threads:[~2019-03-29  1:30 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-29  1:22 Ron Murray [this message]
2019-04-02 13:09 ` PCI device appears intermittently Bjorn Helgaas
2019-04-05 14:10   ` Bjorn Helgaas

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