usbnet: fix usb_autopm_get_interface failure(v1)

[pandora-kernel.git] / drivers / net / usb / usbnet.c

diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index ca7fc9d..c04d49e 100644 (file)
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -45,6 +45,7 @@
 #include <linux/usb/usbnet.h>
 #include <linux/slab.h>
 #include <linux/kernel.h>
+#include <linux/pm_runtime.h>
 
 #define DRIVER_VERSION         "22-Aug-2005"
 
@@ -1273,6 +1274,16 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
        struct usb_device               *xdev;
        int                             status;
        const char                      *name;
+       struct usb_driver       *driver = to_usb_driver(udev->dev.driver);
+
+       /* usbnet already took usb runtime pm, so have to enable the feature
+        * for usb interface, otherwise usb_autopm_get_interface may return
+        * failure if USB_SUSPEND(RUNTIME_PM) is enabled.
+        */
+       if (!driver->supports_autosuspend) {
+               driver->supports_autosuspend = 1;
+               pm_runtime_enable(&udev->dev);
+       }
 
        name = udev->dev.driver->name;
        info = (struct driver_info *) prod->driver_info;