Messages in this thread | | | From | "Albert D. Cahalan" <> | Subject | Re: Patch to make ymfpci legacy address 16 bits | Date | Wed, 9 May 2001 22:53:53 -0400 (EDT) |
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Jeff Garzik writes: > Pavel Roskin wrote:
>> You may need to save some data in memory when the system goes >> to suspend and restore them afterwards. I believe that the PCI >> config space should be saved by BIOS. Everything else is the >> responsibility of the driver. > > In ACPI land the kernel should save and restore the PCI device > config space and the PCI bus config space. It is probably that > similar is necessary under APM.
When you write "the kernel", do you mean the driver or generic code? I hope you mean the driver, because I have this:
1. the device looks normal at power on 2. the driver pokes a device-specific config register 3. the config space header changes from type 0 to type 1
(The class code does NOT indicate PCI-to-PCI bridge. You could say this is like CardBus but much weirder)
If the kernel saves type 1 header data, cuts power using motherboard features, restores power, and then tries to restore type 1 header data into a type 0 header... the system will be well and truly screwed IMHO.
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