Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: (51 commits)
  PM: Improve error code of pm_notifier_call_chain()
  PM: Add "RTC" to PM trace time stamps to avoid confusion
  PM / Suspend: Export suspend_set_ops, suspend_valid_only_mem
  PM / Suspend: Add .suspend_again() callback to suspend_ops
  PM / OPP: Introduce function to free cpufreq table
  ARM / shmobile: Return -EBUSY from A4LC power off if A3RV is active
  PM / Domains: Take .power_off() error code into account
  ARM / shmobile: Use genpd_queue_power_off_work()
  ARM / shmobile: Use pm_genpd_poweroff_unused()
  PM / Domains: Introduce function to power off all unused PM domains
  OMAP: PM: disable idle on suspend for GPIO and UART
  OMAP: PM: omap_device: add API to disable idle on suspend
  OMAP: PM: omap_device: add system PM methods for PM domain handling
  OMAP: PM: omap_device: conditionally use PM domain runtime helpers
  PM / Runtime: Add new helper function: pm_runtime_status_suspended()
  PM / Domains: Queue up power off work only if it is not pending
  PM / Domains: Improve handling of wakeup devices during system suspend
  PM / Domains: Do not restore all devices on power off error
  PM / Domains: Allow callbacks to execute all runtime PM helpers
  PM / Domains: Do not execute device callbacks under locks
  ...

1 files changed, 17 insertions, 1 deletions

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 46767c5..12d1e81 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -18,6 +18,7 @@
 #include <linux/sched.h>
 #include <linux/cpu.h>
 #include <linux/pm_runtime.h>
+#include <linux/suspend.h>
 #include "pci.h"
 
 struct pci_dynid {
@@ -616,6 +617,21 @@ static int pci_pm_prepare(struct device *dev)
 	int error = 0;
 
 	/*
+	 * If a PCI device configured to wake up the system from sleep states
+	 * has been suspended at run time and there's a resume request pending
+	 * for it, this is equivalent to the device signaling wakeup, so the
+	 * system suspend operation should be aborted.
+	 */
+	pm_runtime_get_noresume(dev);
+	if (pm_runtime_barrier(dev) && device_may_wakeup(dev))
+		pm_wakeup_event(dev, 0);
+
+	if (pm_wakeup_pending()) {
+		pm_runtime_put_sync(dev);
+		return -EBUSY;
+	}
+
+	/*
 	 * PCI devices suspended at run time need to be resumed at this
 	 * point, because in general it is necessary to reconfigure them for
 	 * system suspend.  Namely, if the device is supposed to wake up the
@@ -624,7 +640,7 @@ static int pci_pm_prepare(struct device *dev)
 	 * system from the sleep state, we'll have to prevent it from signaling
 	 * wake-up.
 	 */
-	pm_runtime_get_sync(dev);
+	pm_runtime_resume(dev);
 
 	if (drv && drv->pm && drv->pm->prepare)
 		error = drv->pm->prepare(dev);