Merge branch 'fix/kconfig' into for-linus

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 135df164a4c..12d1e81a8ab 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
@@ -638,6 +654,8 @@ static void pci_pm_complete(struct device *dev)
 
 	if (drv && drv->pm && drv->pm->complete)
 		drv->pm->complete(dev);
+
+	pm_runtime_put_sync(dev);
 }
 
 #else /* !CONFIG_PM_SLEEP */