Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6

* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (172 commits)
  USB: Add support for SuperSpeed isoc endpoints
  xhci: Clean up cycle bit math used during stalls.
  xhci: Fix cycle bit calculation during stall handling.
  xhci: Update internal dequeue pointers after stalls.
  USB: Disable auto-suspend for USB 3.0 hubs.
  USB: Remove bogus USB_PORT_STAT_SUPER_SPEED symbol.
  xhci: Return canceled URBs immediately when host is halted.
  xhci: Fixes for suspend/resume of shared HCDs.
  xhci: Fix re-init on power loss after resume.
  xhci: Make roothub functions deal with device removal.
  xhci: Limit roothub ports to 15 USB3 & 31 USB2 ports.
  xhci: Return a USB 3.0 hub descriptor for USB3 roothub.
  xhci: Register second xHCI roothub.
  xhci: Change xhci_find_slot_id_by_port() API.
  xhci: Refactor bus suspend state into a struct.
  xhci: Index with a port array instead of PORTSC addresses.
  USB: Set usb_hcd->state and flags for shared roothubs.
  usb: Make core allocate resources per PCI-device.
  usb: Store bus type in usb_hcd, not in driver flags.
  usb: Change usb_hcd->bandwidth_mutex to a pointer.
  ...

1 files changed, 36 insertions, 7 deletions

diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index 9c014e2ecd68..eb95aecc0015 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -261,7 +261,8 @@ int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
 				intfdata->in_flight--;
 				spin_unlock_irqrestore(&intfdata->susp_lock,
 						       flags);
-				continue;
+				usb_autopm_put_interface_async(port->serial->interface);
+				break;
 			}
 		}
 
@@ -308,11 +309,16 @@ static void usb_wwan_indat_callback(struct urb *urb)
 		/* Resubmit urb so we continue receiving */
 		if (status != -ESHUTDOWN) {
 			err = usb_submit_urb(urb, GFP_ATOMIC);
-			if (err && err != -EPERM)
-				printk(KERN_ERR "%s: resubmit read urb failed. "
-				       "(%d)", __func__, err);
-			else
+			if (err) {
+				if (err != -EPERM) {
+					printk(KERN_ERR "%s: resubmit read urb failed. "
+						"(%d)", __func__, err);
+					/* busy also in error unless we are killed */
+					usb_mark_last_busy(port->serial->dev);
+				}
+			} else {
 				usb_mark_last_busy(port->serial->dev);
+			}
 		}
 
 	}
@@ -421,6 +427,7 @@ int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port)
 	spin_lock_irq(&intfdata->susp_lock);
 	portdata->opened = 1;
 	spin_unlock_irq(&intfdata->susp_lock);
+	/* this balances a get in the generic USB serial code */
 	usb_autopm_put_interface(serial->interface);
 
 	return 0;
@@ -447,7 +454,8 @@ void usb_wwan_close(struct usb_serial_port *port)
 			usb_kill_urb(portdata->in_urbs[i]);
 		for (i = 0; i < N_OUT_URB; i++)
 			usb_kill_urb(portdata->out_urbs[i]);
-		usb_autopm_get_interface(serial->interface);
+		/* balancing - important as an error cannot be handled*/
+		usb_autopm_get_interface_no_resume(serial->interface);
 		serial->interface->needs_remote_wakeup = 0;
 	}
 }
@@ -661,6 +669,18 @@ int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message)
 }
 EXPORT_SYMBOL(usb_wwan_suspend);
 
+static void unbusy_queued_urb(struct urb *urb, struct usb_wwan_port_private *portdata)
+{
+	int i;
+
+	for (i = 0; i < N_OUT_URB; i++) {
+		if (urb == portdata->out_urbs[i]) {
+			clear_bit(i, &portdata->out_busy);
+			break;
+		}
+	}
+}
+
 static void play_delayed(struct usb_serial_port *port)
 {
 	struct usb_wwan_intf_private *data;
@@ -672,8 +692,17 @@ static void play_delayed(struct usb_serial_port *port)
 	data = port->serial->private;
 	while ((urb = usb_get_from_anchor(&portdata->delayed))) {
 		err = usb_submit_urb(urb, GFP_ATOMIC);
-		if (!err)
+		if (!err) {
 			data->in_flight++;
+		} else {
+			/* we have to throw away the rest */
+			do {
+				unbusy_queued_urb(urb, portdata);
+				//extremely dirty
+				atomic_dec(&port->serial->interface->dev.power.usage_count);
+			} while ((urb = usb_get_from_anchor(&portdata->delayed)));
+			break;
+		}
 	}
 }