On 04/15/2011 10:54 PM, Alex Williamson wrote:
For KVM device assignment, we'd like to save off the state of a device prior to passing it to the guest and restore it later. We also want to allow pci_reset_funciton() to be called while the device is owned by the guest. This however overwrites and invalidates the struct pci_dev buffers, so we can't just manually call save and restore. Add generic interfaces for the saved state to be stored into a buffer and reloaded back into struct pci_dev at a later time. +/** + * pci_store_saved_state - Store the device saved state into a buffer + * @dev: - PCI device that we're dealing with + * + * Returns an opaque buffer containing the device saved state. + * NULL if no state or error. + */ +void *pci_store_saved_state(struct pci_dev *dev)
This is too opaque - no type safety. You can return a struct pci_state *, leaving it undefined in headers files.
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