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authorMarcel Holtmann <marcel@holtmann.org>2006-07-03 12:02:24 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2006-07-04 06:53:52 +0400
commitdcdcf63ef12dc3fbaa17a6d04f16ada8e63bb4d0 (patch)
treeebcd16f8c4221305782fd1643eef018b546df36e /drivers/bluetooth
parent2b86ad21deec4c47a1f0089298f12e4038c2aa68 (diff)
downloadlinux-dcdcf63ef12dc3fbaa17a6d04f16ada8e63bb4d0.tar.xz
[Bluetooth] Add suspend/resume support to the HCI USB driver
This patch implements the suspend/resume methods for the HCI USB driver by killing all outstanding URBs on suspend, and re-issuing them on resume. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r--drivers/bluetooth/hci_usb.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_usb.c b/drivers/bluetooth/hci_usb.c
index 95afce1cb465..987a3dff8af9 100644
--- a/drivers/bluetooth/hci_usb.c
+++ b/drivers/bluetooth/hci_usb.c
@@ -1045,10 +1045,81 @@ static void hci_usb_disconnect(struct usb_interface *intf)
hci_free_dev(hdev);
}
+static int hci_usb_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct hci_usb *husb = usb_get_intfdata(intf);
+ struct list_head killed;
+ unsigned long flags;
+ int i;
+
+ if (!husb || intf == husb->isoc_iface)
+ return 0;
+
+ hci_suspend_dev(husb->hdev);
+
+ INIT_LIST_HEAD(&killed);
+
+ for (i = 0; i < 4; i++) {
+ struct _urb_queue *q = &husb->pending_q[i];
+ struct _urb *_urb, *_tmp;
+
+ while ((_urb = _urb_dequeue(q))) {
+ /* reset queue since _urb_dequeue sets it to NULL */
+ _urb->queue = q;
+ usb_kill_urb(&_urb->urb);
+ list_add(&_urb->list, &killed);
+ }
+
+ spin_lock_irqsave(&q->lock, flags);
+
+ list_for_each_entry_safe(_urb, _tmp, &killed, list) {
+ list_move_tail(&_urb->list, &q->head);
+ }
+
+ spin_unlock_irqrestore(&q->lock, flags);
+ }
+
+ return 0;
+}
+
+static int hci_usb_resume(struct usb_interface *intf)
+{
+ struct hci_usb *husb = usb_get_intfdata(intf);
+ unsigned long flags;
+ int i, err = 0;
+
+ if (!husb || intf == husb->isoc_iface)
+ return 0;
+
+ for (i = 0; i < 4; i++) {
+ struct _urb_queue *q = &husb->pending_q[i];
+ struct _urb *_urb;
+
+ spin_lock_irqsave(&q->lock, flags);
+
+ list_for_each_entry(_urb, &q->head, list) {
+ err = usb_submit_urb(&_urb->urb, GFP_ATOMIC);
+ if (err)
+ break;
+ }
+
+ spin_unlock_irqrestore(&q->lock, flags);
+
+ if (err)
+ return -EIO;
+ }
+
+ hci_resume_dev(husb->hdev);
+
+ return 0;
+}
+
static struct usb_driver hci_usb_driver = {
.name = "hci_usb",
.probe = hci_usb_probe,
.disconnect = hci_usb_disconnect,
+ .suspend = hci_usb_suspend,
+ .resume = hci_usb_resume,
.id_table = bluetooth_ids,
};