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>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index af0cc34..9528781 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -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)
