PCI/PM: Make pci_pme_active() ignore devices without PME support

Make pci_pme_active() ignore devices without PME support, so that
it doesn't print the "PME enabled" or "PME disabled" debug messages
for devices that don't support PME.

So that pci_pme_active() doesn't have to check pm_cap in addition
to pme_support, make pci_pm_init() clear pme_support upfront to
make sure that it will be 0 for pm_cap equal to 0.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index fc9bd81e8e3b..a5e0e5f4953c 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1571,7 +1571,7 @@ void pci_pme_active(struct pci_dev *dev, bool enable)
 {
         u16 pmcsr;
 
-        if (!dev->pm_cap)
+        if (!dev->pme_support)
                 return;
 
         pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
@@ -1920,6 +1920,7 @@ void pci_pm_init(struct pci_dev *dev)
         dev->wakeup_prepared = false;
 
         dev->pm_cap = 0;
+        dev->pme_support = 0;
 
         /* find PCI PM capability in list */
         pm = pci_find_capability(dev, PCI_CAP_ID_PM);
@@ -1971,8 +1972,6 @@ void pci_pm_init(struct pci_dev *dev)
                 device_set_wakeup_capable(&dev->dev, true);
                 /* Disable the PME# generation functionality */
                 pci_pme_active(dev, false);
-        } else {
-                dev->pme_support = 0;
         }
 }