Re: [PATCH] pci-quirks: Unhide 'Overflow' device on i828{6,7}5P/PE chipsets

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From: Robert Hancock

Subject: Re: [PATCH] pci-quirks: Unhide 'Overflow' device on i828{6,7}5P/PE chipsets

Date: Tuesday, December 23, 2008 - 4:35 pm

Michał Mirosław wrote:
quoted text> As I found out from EDAC driver sources for i82875P some BIOSes for
> i82875P/PE hide 'overflow' device 6. The same thing happens for
> i82865P/PE chipsets.
> 
> After testing this patch for couple of days on my laptop (i82856P)
> it looks like something is resetting device 0 (MCH) config register
> 0xF4 to zero and effectively disabling the device again. The delay
> looks random to me. I can easily update the register using
> 'hexedit /sys/bus/pci/devices/0000\:00\:00.0/config' and see
> correct values in lspci output afterwards.

Could be the BIOS is using the device in SMI code or something (and 
that's what disables it), therefore it may be unsafe to unhide this device.

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Messages in current thread:

[PATCH] pci-quirks: Unhide 'Overflow' device on i828{6,7}5 ..., =?iso-8859-2?Q?Micha ..., (Tue Dec 23, 2:50 pm)

Re: [PATCH] pci-quirks: Unhide 'Overflow' device on i828{6 ..., Robert Hancock, (Tue Dec 23, 4:35 pm)

Re: [PATCH] pci-quirks: Unhide 'Overflow' device on i828{6 ..., =?iso-8859-2?Q?Micha ..., (Tue Dec 23, 4:54 pm)

[PATCH 2.6.28 1/3] PCI-quirks: Unhide MCH5/6 memory contro ..., =?iso-8859-2?Q?Micha ..., (Thu Jan 1, 12:02 pm)

[PATCH 2.6.28 2/3] EDAC: Use 'overflow' device for binding ..., =?iso-8859-2?Q?Micha ..., (Thu Jan 1, 12:05 pm)

[PATCH 2.6.28 3/3] EDAC: Add support for i82865P/PE chipsets, =?iso-8859-2?Q?Micha ..., (Thu Jan 1, 12:06 pm)

Re: [PATCH 2.6.28 1/3] PCI-quirks: Unhide MCH5/6 memory co ..., Jesse Barnes, (Mon Jan 5, 12:20 pm)

Re: [PATCH 2.6.28 1/3] PCI-quirks: Unhide MCH5/6 memory co ..., =?iso-8859-2?Q?Micha ..., (Mon Jan 5, 1:28 pm)

[PATCH 2.6.28 1/3] PCI-quirks: Unhide MCH5/6 memory contro ..., =?iso-8859-2?Q?Micha ..., (Mon Jan 5, 1:30 pm)

Re: [PATCH 2.6.28 1/3] PCI-quirks: Unhide MCH5/6 memory co ..., Jesse Barnes, (Mon Jan 5, 2:02 pm)

Re: [PATCH 2.6.28 1/3] PCI-quirks: Unhide MCH5/6 memory co ..., Bjorn Helgaas, (Tue Jan 6, 12:02 pm)

Re: [PATCH 2.6.28 1/3] PCI-quirks: Unhide MCH5/6 memory co ..., Jesse Barnes, (Tue Jan 6, 1:21 pm)


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