usb_wwan: error case of resume
If an error happens during resumption.
The remaining data has to be cleanly discarded and the pm
counters have to be adjusted.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index 84fe1b6..fe5e48e 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -664,6 +664,18 @@
}
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;
@@ -675,8 +687,17 @@
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;
+ }
}
}