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SubjectRe: [PATCH 4/9] PCI PM: save and restore configuration state correctly

> This patch updates pci_save_state() and pci_restore_state() to be more
> in line with the PCI PM specification. Specifically, read-only
> registers are no longer saved, BIST is never touched, and the command
> register is handled more carefully. A new data structure "struct
> pci_dev_config" is created to store any context that might need to be
> saved before entering a higher power state.
> The configuration space cache is now obsolete and no longer needed for
> PCI PM. However, this patch does not remove it as it is still
> referenced by the PCI configuration space access restriction code. As
> an unexpected bonus, this patch also fixes a possible memory leak;
> drivers/pci/access.c wasn't expecting the MSI code in pci_save_state().

This should solve problems for people that use 'backwards' PCI space
restoring these days. Thanks, nice!

Thanks for all the (sleeping) penguins.
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