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PCI/PM: Expand description of pci_set_power_state() 

Add two reasons for returning 0 value to the description of
pci_set_power_state() to include the cases when:

  - the transition is to D1 or D2 but D1 and D2 are not supported
  - the transition is to D3 but D3 is not supported

Signed-off-by: Piotr Gregor <piotrgregor@rsyncme.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Piotr Gregor 2017-08-02 20:42:18 +01:00 committed by Bjorn Helgaas
parent 16f73eb02d
commit ab4b8a47ab
1 changed files with 2 additions and 0 deletions
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2
drivers/pci/pci.c
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@ -892,7 +892,9 @@ EXPORT_SYMBOL_GPL(__pci_complete_power_transition);
* -EINVAL if the requested state is invalid.
* -EIO if device does not support PCI PM or its PM capabilities register has a
* wrong version, or device doesn't support the requested state.
* 0 if the transition is to D1 or D2 but D1 and D2 are not supported.
* 0 if device already is in the requested state.
* 0 if the transition is to D3 but D3 is not supported.
* 0 if device's power state has been successfully changed.
*/
int pci_set_power_state(struct pci_dev *dev, pci_power_t state)