Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5c5482266537fdb24d6b8462540d8f65a6007a97
Commit: 5c5482266537fdb24d6b8462540d8f65a6007a97
Parent: f951375d470c1a20d92c34377991197e6bf17990
Author: Ohad Ben-Cohen <[EMAIL PROTECTED]>
AuthorDate: Thu Jan 10 22:24:43 2008 -0800
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Thu Jan 10 22:24:43 2008 -0800
[BLUETOOTH]: Always send explicit hci_ll wake-up acks.
In the (rare) event of simultaneous mutual wake up requests,
do send the chip an explicit wake-up ack. This is required
for Texas Instruments's BRF6350 chip.
Signed-off-by: Ohad Ben-Cohen <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
drivers/bluetooth/hci_ll.c | 23 ++++++++++++++---------
1 files changed, 14 insertions(+), 9 deletions(-)
diff --git a/drivers/bluetooth/hci_ll.c b/drivers/bluetooth/hci_ll.c
index 8c3e62a..b91d45a 100644
--- a/drivers/bluetooth/hci_ll.c
+++ b/drivers/bluetooth/hci_ll.c
@@ -204,6 +204,19 @@ static void ll_device_want_to_wakeup(struct hci_uart *hu)
spin_lock_irqsave(&ll->hcill_lock, flags);
switch (ll->hcill_state) {
+ case HCILL_ASLEEP_TO_AWAKE:
+ /*
+ * This state means that both the host and the BRF chip
+ * have simultaneously sent a wake-up-indication packet.
+ * Traditionaly, in this case, receiving a wake-up-indication
+ * was enough and an additional wake-up-ack wasn't needed.
+ * This has changed with the BRF6350, which does require an
+ * explicit wake-up-ack. Other BRF versions, which do not
+ * require an explicit ack here, do accept it, thus it is
+ * perfectly safe to always send one.
+ */
+ BT_DBG("dual wake-up-indication");
+ /* deliberate fall-through - do not add break */
case HCILL_ASLEEP:
/* acknowledge device wake up */
if (send_hcill_cmd(HCILL_WAKE_UP_ACK, hu) < 0) {
@@ -211,16 +224,8 @@ static void ll_device_want_to_wakeup(struct hci_uart *hu)
goto out;
}
break;
- case HCILL_ASLEEP_TO_AWAKE:
- /*
- * this state means that a wake-up-indication
- * is already on its way to the device,
- * and will serve as the required wake-up-ack
- */
- BT_DBG("dual wake-up-indication");
- break;
default:
- /* any other state are illegal */
+ /* any other state is illegal */
BT_ERR("received HCILL_WAKE_UP_IND in state %ld",
ll->hcill_state);
break;
}
-
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