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authorJohan Hedberg <johan.hedberg@intel.com>2012-03-01 23:35:55 +0400
committerJohan Hedberg <johan.hedberg@intel.com>2012-03-01 23:44:55 +0400
commit75fb0e324daa48ec458fb5c2960eb07b80cfad9d (patch)
tree78229ecbcf7b08b1aa3a47ce9e5927e8e64dd6a2 /net/bluetooth
parent8b90129cc5789a4c65547c91c9a7b1fd3a4d56a4 (diff)
downloadlinux-75fb0e324daa48ec458fb5c2960eb07b80cfad9d.tar.xz
Bluetooth: Fix init sequence for some CSR based controllers
Some CSR controllers will generate a spontaneous reset during init and just eat up any pending command without sending a command complete for it. This patch solves the issue by just resending whatever was the last sent command. hci_send_cmd is not used since we need to bypass all other commands in the send queue. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth')
-rw-r--r--net/bluetooth/hci_core.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index db484a8e7364..d3ddc0ba9cd4 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -82,8 +82,28 @@ void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
/* If this is the init phase check if the completed command matches
* the last init command, and if not just return.
*/
- if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd)
+ if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {
+ struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
+ struct sk_buff *skb;
+
+ /* Some CSR based controllers generate a spontaneous
+ * reset complete event during init and any pending
+ * command will never be completed. In such a case we
+ * need to resend whatever was the last sent
+ * command.
+ */
+
+ if (cmd != HCI_OP_RESET || sent->opcode == HCI_OP_RESET)
+ return;
+
+ skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC);
+ if (skb) {
+ skb_queue_head(&hdev->cmd_q, skb);
+ queue_work(hdev->workqueue, &hdev->cmd_work);
+ }
+
return;
+ }
if (hdev->req_status == HCI_REQ_PEND) {
hdev->req_result = result;