+ gigaset_freecs(cs);
+}
+
+/* gigaset_suspend
+ * This function is called before the USB connection is suspended.
+ */
+static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct cardstate *cs = usb_get_intfdata(intf);
+ struct bas_cardstate *ucs = cs->hw.bas;
+ int rc;
+
+ /* set suspend flag; this stops AT command/response traffic */
+ if (update_basstate(ucs, BS_SUSPEND, 0) & BS_SUSPEND) {
+ gig_dbg(DEBUG_SUSPEND, "already suspended");
+ return 0;
+ }
+
+ /* wait a bit for blocking conditions to go away */
+ rc = wait_event_timeout(ucs->waitqueue,
+ !(ucs->basstate &
+ (BS_B1OPEN|BS_B2OPEN|BS_ATRDPEND|BS_ATWRPEND)),
+ BAS_TIMEOUT*HZ/10);
+ gig_dbg(DEBUG_SUSPEND, "wait_event_timeout() -> %d", rc);
+
+ /* check for conditions preventing suspend */
+ if (ucs->basstate & (BS_B1OPEN|BS_B2OPEN|BS_ATRDPEND|BS_ATWRPEND)) {
+ dev_warn(cs->dev, "cannot suspend:\n");
+ if (ucs->basstate & BS_B1OPEN)
+ dev_warn(cs->dev, " B channel 1 open\n");
+ if (ucs->basstate & BS_B2OPEN)
+ dev_warn(cs->dev, " B channel 2 open\n");
+ if (ucs->basstate & BS_ATRDPEND)
+ dev_warn(cs->dev, " receiving AT reply\n");
+ if (ucs->basstate & BS_ATWRPEND)
+ dev_warn(cs->dev, " sending AT command\n");
+ update_basstate(ucs, 0, BS_SUSPEND);
+ return -EBUSY;
+ }
+
+ /* close AT channel if open */
+ if (ucs->basstate & BS_ATOPEN) {
+ gig_dbg(DEBUG_SUSPEND, "closing AT channel");
+ rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, 0);
+ if (rc) {
+ update_basstate(ucs, 0, BS_SUSPEND);
+ return rc;
+ }
+ wait_event_timeout(ucs->waitqueue, !ucs->pending,
+ BAS_TIMEOUT*HZ/10);
+ /* in case of timeout, proceed anyway */
+ }
+
+ /* kill all URBs and timers that might still be pending */
+ usb_kill_urb(ucs->urb_ctrl);
+ usb_kill_urb(ucs->urb_int_in);
+ del_timer_sync(&ucs->timer_ctrl);
+
+ gig_dbg(DEBUG_SUSPEND, "suspend complete");
+ return 0;