irda-usb: suspend/resume support

This patch adds power management suspend/resume hooks for irda-usb.

Signed-off-by: Tadashi Abe <tabe@mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 40 insertions, 0 deletions

diff --git a/drivers/net/irda/irda-usb.c b/drivers/net/irda/irda-usb.c
index 006ba23110db..394b2b17075e 100644
--- a/drivers/net/irda/irda-usb.c
+++ b/drivers/net/irda/irda-usb.c
@@ -1859,6 +1859,42 @@ static void irda_usb_disconnect(struct usb_interface *intf)
         IRDA_DEBUG(0, "%s(), USB IrDA Disconnected\n", __func__);
 }
 
+#ifdef CONFIG_PM
+/* USB suspend, so power off the transmitter/receiver */
+static int irda_usb_suspend(struct usb_interface *intf, pm_message_t message)
+{
+        struct irda_usb_cb *self = usb_get_intfdata(intf);
+        int i;
+
+        netif_device_detach(self->netdev);
+
+        if (self->tx_urb != NULL)
+                usb_kill_urb(self->tx_urb);
+        if (self->speed_urb != NULL)
+                usb_kill_urb(self->speed_urb);
+        for (i = 0; i < self->max_rx_urb; i++) {
+                if (self->rx_urb[i] != NULL)
+                        usb_kill_urb(self->rx_urb[i]);
+        }
+        return 0;
+}
+
+/* Coming out of suspend, so reset hardware */
+static int irda_usb_resume(struct usb_interface *intf)
+{
+        struct irda_usb_cb *self = usb_get_intfdata(intf);
+        int i;
+
+        for (i = 0; i < self->max_rx_urb; i++) {
+                if (self->rx_urb[i] != NULL)
+                        usb_submit_urb(self->rx_urb[i], GFP_KERNEL);
+        }
+
+        netif_device_attach(self->netdev);
+        return 0;
+}
+#endif
+
 /*------------------------------------------------------------------*/
 /*
  * USB device callbacks
@@ -1868,6 +1904,10 @@ static struct usb_driver irda_driver = {
         .probe          = irda_usb_probe,
         .disconnect     = irda_usb_disconnect,
         .id_table       = dongles,
+#ifdef CONFIG_PM
+        .suspend        = irda_usb_suspend,
+        .resume         = irda_usb_resume,
+#endif
 };
 
 /************************* MODULE CALLBACKS *************************/