1 files changed, 56 insertions, 0 deletions

diff --git a/drivers/isdn/gigaset/usb-gigaset.c b/drivers/isdn/gigaset/usb-gigaset.c
index d81c0e3f7702..7028911d91ed 100644
--- a/drivers/isdn/gigaset/usb-gigaset.c
+++ b/drivers/isdn/gigaset/usb-gigaset.c
@@ -109,6 +109,11 @@ static int gigaset_probe(struct usb_interface *interface,
                          const struct usb_device_id *id);
 static void gigaset_disconnect(struct usb_interface *interface);
 
+/* functions called before/after suspend */
+static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
+static int gigaset_resume(struct usb_interface *intf);
+static int gigaset_pre_reset(struct usb_interface *intf);
+
 static struct gigaset_driver *driver = NULL;
 static struct cardstate *cardstate = NULL;
 
@@ -118,6 +123,11 @@ static struct usb_driver gigaset_usb_driver = {
         .probe =        gigaset_probe,
         .disconnect =   gigaset_disconnect,
         .id_table =     gigaset_table,
+        .suspend =      gigaset_suspend,
+        .resume =       gigaset_resume,
+        .reset_resume = gigaset_resume,
+        .pre_reset =    gigaset_pre_reset,
+        .post_reset =   gigaset_resume,
 };
 
 struct usb_cardstate {
@@ -845,6 +855,52 @@ static void gigaset_disconnect(struct usb_interface *interface)
         gigaset_unassign(cs);
 }
 
+/* gigaset_suspend
+ * This function is called before the USB connection is suspended or reset.
+ */
+static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
+{
+        struct cardstate *cs = usb_get_intfdata(intf);
+
+        /* stop activity */
+        cs->connected = 0;      /* prevent rescheduling */
+        usb_kill_urb(cs->hw.usb->read_urb);
+        tasklet_kill(&cs->write_tasklet);
+        usb_kill_urb(cs->hw.usb->bulk_out_urb);
+
+        gig_dbg(DEBUG_SUSPEND, "suspend complete");
+        return 0;
+}
+
+/* gigaset_resume
+ * This function is called after the USB connection has been resumed or reset.
+ */
+static int gigaset_resume(struct usb_interface *intf)
+{
+        struct cardstate *cs = usb_get_intfdata(intf);
+        int rc;
+
+        /* resubmit interrupt URB */
+        cs->connected = 1;
+        rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
+        if (rc) {
+                dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
+                return rc;
+        }
+
+        gig_dbg(DEBUG_SUSPEND, "resume complete");
+        return 0;
+}
+
+/* gigaset_pre_reset
+ * This function is called before the USB connection is reset.
+ */
+static int gigaset_pre_reset(struct usb_interface *intf)
+{
+        /* same as suspend */
+        return gigaset_suspend(intf, PMSG_ON);
+}
+
 static const struct gigaset_ops ops = {
         gigaset_write_cmd,
         gigaset_write_room,