diff options
| author | Johan Hedberg <johan.hedberg@nokia.com> | 2010-12-22 00:01:27 +0300 |
|---|---|---|
| committer | Gustavo F. Padovan <padovan@profusion.mobi> | 2010-12-23 03:58:07 +0300 |
| commit | 23bb57633df97ede067ea26f3cdc8a7ba2cd8109 (patch) | |
| tree | 3aa9a25b17da84975691af7159b030f810560e38 /net/bluetooth/hci_core.c | |
| parent | c71e97bfaadfa727669fcfcf12301744fd169091 (diff) | |
| download | linux-23bb57633df97ede067ea26f3cdc8a7ba2cd8109.tar.xz | |
Bluetooth: Fix __hci_request synchronization for hci_open_dev
The initialization function used by hci_open_dev (hci_init_req) sends
many different HCI commands. The __hci_request function should only
return when all of these commands have completed (or a timeout occurs).
Several of these commands cause hci_req_complete to be called which
causes __hci_request to return prematurely.
This patch fixes the issue by adding a new hdev->req_last_cmd variable
which is set during the initialization procedure. The hci_req_complete
function will no longer mark the request as complete until the command
matching hdev->req_last_cmd completes.
Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Diffstat (limited to 'net/bluetooth/hci_core.c')
| -rw-r--r-- | net/bluetooth/hci_core.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 1a4ec97d5ac4..8b602d881fd7 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -91,9 +91,16 @@ static void hci_notify(struct hci_dev *hdev, int event) /* ---- HCI requests ---- */ -void hci_req_complete(struct hci_dev *hdev, int result) +void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result) { - BT_DBG("%s result 0x%2.2x", hdev->name, result); + BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result); + + /* If the request has set req_last_cmd (typical for multi-HCI + * command requests) check if the completed command matches + * this, and if not just return. Single HCI command requests + * typically leave req_last_cmd as 0 */ + if (hdev->req_last_cmd && cmd != hdev->req_last_cmd) + return; if (hdev->req_status == HCI_REQ_PEND) { hdev->req_result = result; @@ -149,7 +156,7 @@ static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, break; } - hdev->req_status = hdev->req_result = 0; + hdev->req_last_cmd = hdev->req_status = hdev->req_result = 0; BT_DBG("%s end: err %d", hdev->name, err); @@ -252,6 +259,8 @@ static void hci_init_req(struct hci_dev *hdev, unsigned long opt) /* Connection accept timeout ~20 secs */ param = cpu_to_le16(0x7d00); hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); + + hdev->req_last_cmd = HCI_OP_WRITE_CA_TIMEOUT; } static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) |