PCI/PM: Rearrange pci_set_power_state()

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The part of pci_set_power_state() related to transitions into
low-power states is unnecessary convoluted, so clearly divide it
into the D3cold special case and the general case covering all of
the other states.

Also fix a potential issue with calling pci_bus_set_current_state()
to set the current state of all devices on the subordinate bus to
D3cold without checking if the power state of the parent bridge has
really changed to D3cold.

Link: https://lore.kernel.org/r/2139440.Mh6RI2rZIc@kreacher
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>

...

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Rafael J. Wysocki 2022-05-05 20:16:50 +02:00 • committed by Bjorn Helgaas

parent 0aacdc9574

commit 3cc2a2b270

1 changed files with 17 additions and 11 deletions

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drivers/pci/pci.c

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