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authorPiotr Gregor <piotrgregor@rsyncme.org>2017-08-02 21:42:18 +0200
committerBjorn Helgaas <bhelgaas@google.com>2017-08-04 01:12:56 +0200
commitab4b8a47abeefad94cdb6b4c0df6a13f4f6ae4e0 (patch)
tree23d50d4c8bcaabd69e0d93d57342eec8bfa6def7
parentLinux 4.13-rc3 (diff)
downloadlinux-ab4b8a47abeefad94cdb6b4c0df6a13f4f6ae4e0.tar.xz
linux-ab4b8a47abeefad94cdb6b4c0df6a13f4f6ae4e0.zip
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>
-rw-r--r--drivers/pci/pci.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index af0cc3456dc1..9528781db4d3 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)