Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[linux-2.6-omap-h63xx.git] / drivers / usb / core / generic.c

diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c
index 9bbcb20e2d94c3bf5ca96f77d0c1050d87d14eb2..b2fc2b115256633a2f19bfd2a013ffaffedcaf28 100644 (file)
--- a/drivers/usb/core/generic.c
+++ b/drivers/usb/core/generic.c
@@ -19,6 +19,7 @@
 
 #include <linux/usb.h>
 #include "usb.h"
+#include "hcd.h"
 
 static inline const char *plural(int n)
 {
@@ -193,16 +194,34 @@ static void generic_disconnect(struct usb_device *udev)
 
 static int generic_suspend(struct usb_device *udev, pm_message_t msg)
 {
-       /* USB devices enter SUSPEND state through their hubs, but can be
-        * marked for FREEZE as soon as their children are already idled.
-        * But those semantics are useless, so we equate the two (sigh).
+       int rc;
+
+       /* Normal USB devices suspend through their upstream port.
+        * Root hubs don't have upstream ports to suspend,
+        * so we have to shut down their downstream HC-to-USB
+        * interfaces manually by doing a bus (or "global") suspend.
         */
-       return usb_port_suspend(udev);
+       if (!udev->parent)
+               rc = hcd_bus_suspend(udev);
+       else
+               rc = usb_port_suspend(udev);
+       return rc;
 }
 
 static int generic_resume(struct usb_device *udev)
 {
-       return usb_port_resume(udev);
+       int rc;
+
+       /* Normal USB devices resume/reset through their upstream port.
+        * Root hubs don't have upstream ports to resume or reset,
+        * so we have to start up their downstream HC-to-USB
+        * interfaces manually by doing a bus (or "global") resume.
+        */
+       if (!udev->parent)
+               rc = hcd_bus_resume(udev);
+       else
+               rc = usb_port_resume(udev);
+       return rc;
 }
 
 #endif /* CONFIG_PM */