The Linux Kernel API | ||
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Transition a device to a new power state, using the Power Management Capabilities in the device's config space.
-EINVAL if trying to enter a lower state than we're already in. 0 if we're already in the requested state. -EIO if device does not support PCI PM. 0 if we can successfully change the power state.
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pci_find_parent_resource | Up | pci_save_state |