PCI PM: Simplify PCI wake-up code

Rework the PCI wake-up code so that it's easier to read without
changing the functionality.

Reviewed-by: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index ea15b05..e798c47 100644 (file)
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -111,12 +111,16 @@ static bool acpi_pci_can_wakeup(struct pci_dev *dev)
 
 static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
 {
-       int error = acpi_pm_device_sleep_wake(&dev->dev, enable);
+       int error;
 
+       if (!acpi_pci_can_wakeup(dev))
+               return 0;
+
+       error = acpi_pm_device_sleep_wake(&dev->dev, enable);
        if (!error)
-               dev_printk(KERN_INFO, &dev->dev,
-                               "wake-up capability %s by ACPI\n",
+               dev_info(&dev->dev, "wake-up capability %s by ACPI\n",
                                enable ? "enabled" : "disabled");
+
        return error;
 }
 

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 8c663d6..84a6d6d 100644 (file)
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1220,8 +1220,7 @@ void pci_pme_active(struct pci_dev *dev, bool enable)
  */
 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable)
 {
-       int error = 0;
-       bool pme_done = false;
+       int ret = 0;
 
        if (enable && !device_may_wakeup(&dev->dev))
                return -EINVAL;
@@ -1232,18 +1231,22 @@ int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable)
         * enable.  To disable wake-up we call the platform first, for symmetry.
         */
 
-       if (!enable && platform_pci_can_wakeup(dev))
-               error = platform_pci_sleep_wake(dev, false);
-
-       if (!enable || pci_pme_capable(dev, state)) {
-               pci_pme_active(dev, enable);
-               pme_done = true;
-       }
+       if (enable) {
+               int error;
 
-       if (enable && platform_pci_can_wakeup(dev))
+               if (pci_pme_capable(dev, state))
+                       pci_pme_active(dev, true);
+               else
+                       ret = 1;
                error = platform_pci_sleep_wake(dev, true);
+               if (ret)
+                       ret = error;
+       } else {
+               platform_pci_sleep_wake(dev, false);
+               pci_pme_active(dev, false);
+       }
 
-       return pme_done ? 0 : error;
+       return ret;
 }
 
 /**