From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
The wait_on_bit_timeout() is a simpler and race-free way of waiting for
a bit to be cleared than the current code in btusb.c. This patch updates
the code to use the helper function (its btusb copy - to be later
updated to use a global one).
Signed-off-by: Johan Hedberg <johan.hedberg@xxxxxxxxx>
---
drivers/bluetooth/btusb.c | 44 +++++++++++++++++++-------------------------
1 file changed, 19 insertions(+), 25 deletions(-)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 808568d2722f..f67bf761144e 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -1822,8 +1822,10 @@ static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
*/
if (skb->len == 9 && hdr->evt == 0xff && hdr->plen == 0x07 &&
skb->data[2] == 0x02) {
- if (test_and_clear_bit(BTUSB_BOOTING, &data->flags))
- wake_up_interruptible(&hdev->req_wait_q);
+ if (test_and_clear_bit(BTUSB_BOOTING, &data->flags)) {
+ smp_mb__after_atomic();
+ wake_up_bit(&data->flags, BTUSB_BOOTING);
+ }
}
}
@@ -2236,33 +2238,25 @@ done:
/* The bootloader will not indicate when the device is ready. This
* is done by the operational firmware sending bootup notification.
+ *
+ * Booting into operational firmware should not take longer than
+ * 1 second. However if that happens, then just fail the setup
+ * since something went wrong.
*/
- if (test_bit(BTUSB_BOOTING, &data->flags)) {
- DECLARE_WAITQUEUE(wait, current);
- signed long timeout;
-
- BT_INFO("%s: Waiting for device to boot", hdev->name);
-
- add_wait_queue(&hdev->req_wait_q, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
-
- /* Booting into operational firmware should not take
- * longer than 1 second. However if that happens, then
- * just fail the setup since something went wrong.
- */
- timeout = schedule_timeout(msecs_to_jiffies(1000));
+ BT_INFO("%s: Waiting for device to boot", hdev->name);
- remove_wait_queue(&hdev->req_wait_q, &wait);
+ err = btusb_wait_on_bit_timeout(&data->flags, BTUSB_BOOTING,
+ msecs_to_jiffies(1000),
+ TASK_INTERRUPTIBLE);
- if (signal_pending(current)) {
- BT_ERR("%s: Device boot interrupted", hdev->name);
- return -EINTR;
- }
+ if (err == 1) {
+ BT_ERR("%s: Device boot interrupted", hdev->name);
+ return -EINTR;
+ }
- if (!timeout) {
- BT_ERR("%s: Device boot timeout", hdev->name);
- return -ETIMEDOUT;
- }
+ if (err) {
+ BT_ERR("%s: Device boot timeout", hdev->name);
+ return -ETIMEDOUT;
}
rettime = ktime_get();
--
2.1.0
--
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