usb: hub: Fix error loop seen after hub communication errors

[mirror_ubuntu-zesty-kernel.git] / drivers / usb / core / driver.c

diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index cdee5130638b109e5be899c41b8a5f432620c4e3..7ebdf2a4e8fe9e65e02a9eb1f244f847cc17bd33 100644 (file)
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1331,6 +1331,24 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
                 */
                if (udev->parent && !PMSG_IS_AUTO(msg))
                        status = 0;
+
+               /*
+                * If the device is inaccessible, don't try to resume
+                * suspended interfaces and just return the error.
+                */
+               if (status && status != -EBUSY) {
+                       int err;
+                       u16 devstat;
+
+                       err = usb_get_status(udev, USB_RECIP_DEVICE, 0,
+                                            &devstat);
+                       if (err) {
+                               dev_err(&udev->dev,
+                                       "Failed to suspend device, error %d\n",
+                                       status);
+                               goto done;
+                       }
+               }
        }
 
        /* If the suspend failed, resume interfaces that did get suspended */