X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fpci%2Fpci-driver.c;h=12d1e81a8abecd2fc1a6bc7ab3946d53df05542a;hb=ed476418394f12d47f27a75424c237a94d244f10;hp=46767c53917a5e28ee8fcec10d92de6c39609eba;hpb=204d1641d200709c759d8c269458cbc7de378c40;p=karo-tx-linux.git

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 46767c53917a..12d1e81a8abe 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 {
@@ -615,6 +616,21 @@ static int pci_pm_prepare(struct device *dev)
 	struct device_driver *drv = dev->driver;
 	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
@@ -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);