Staging: wlan-ng prism2usb: add suspend/resume

There is no need trying to load the (even in most cases) not availible
firmware after suspend. This saves about 30 secounds on reset waiting
for timeout.

Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 65 insertions, 0 deletions

diff --git a/drivers/staging/wlan-ng/prism2usb.c b/drivers/staging/wlan-ng/prism2usb.c
index 501d27f74c7d..f5cff751db2f 100644
--- a/drivers/staging/wlan-ng/prism2usb.c
+++ b/drivers/staging/wlan-ng/prism2usb.c
@@ -285,11 +285,76 @@ exit:
         usb_set_intfdata(interface, NULL);
 }
 
+#ifdef CONFIG_PM
+static int prism2sta_suspend(struct usb_interface *interface,
+                                pm_message_t message)
+{
+        hfa384x_t *hw = NULL;
+        wlandevice_t *wlandev;
+        wlandev = (wlandevice_t *) usb_get_intfdata(interface);
+        if (!wlandev)
+                return -ENODEV;
+
+        hw = wlandev->priv;
+        if (!hw)
+                return -ENODEV;
+
+        prism2sta_ifstate(wlandev, P80211ENUM_ifstate_disable);
+
+        usb_kill_urb(&hw->rx_urb);
+        usb_kill_urb(&hw->tx_urb);
+        usb_kill_urb(&hw->ctlx_urb);
+
+        return 0;
+}
+
+static int prism2sta_resume(struct usb_interface *interface)
+{
+        int result = 0;
+        hfa384x_t *hw = NULL;
+        wlandevice_t *wlandev;
+        wlandev = (wlandevice_t *) usb_get_intfdata(interface);
+        if (!wlandev)
+                return -ENODEV;
+
+        hw = wlandev->priv;
+        if (!hw)
+                return -ENODEV;
+
+        /* Do a chip-level reset on the MAC */
+        if (prism2_doreset) {
+                result = hfa384x_corereset(hw,
+                                           prism2_reset_holdtime,
+                                           prism2_reset_settletime, 0);
+                if (result != 0) {
+                        unregister_wlandev(wlandev);
+                        hfa384x_destroy(hw);
+                        printk(KERN_ERR
+                               "%s: hfa384x_corereset() failed.\n", dev_info);
+                        kfree(wlandev);
+                        kfree(hw);
+                        wlandev = NULL;
+                        return -ENODEV;
+                }
+        }
+
+        prism2sta_ifstate(wlandev, P80211ENUM_ifstate_enable);
+
+        return 0;
+}
+#else
+#define prism2sta_suspend NULL
+#define prism2sta_resume NULL
+#endif /* CONFIG_PM */
+
 static struct usb_driver prism2_usb_driver = {
         .name = "prism2_usb",
         .probe = prism2sta_probe_usb,
         .disconnect = prism2sta_disconnect_usb,
         .id_table = usb_prism_tbl,
+        .suspend = prism2sta_suspend,
+        .resume = prism2sta_resume,
+        .reset_resume = prism2sta_resume,
         /* fops, minor? */
 };