Bluetooth: Add HCI Read Flow Control Mode function

Upstream Code Aurora function with minor trivial fixes.
Origin: git://codeaurora.org/kernel/msm.git

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

3 files changed, 27 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 376c57420abe..ee83c36d35aa 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -677,6 +677,12 @@ struct hci_rp_read_local_oob_data {
 
 #define HCI_OP_READ_INQ_RSP_TX_POWER    0x0c58
 
+#define HCI_OP_READ_FLOW_CONTROL_MODE   0x0c66
+struct hci_rp_read_flow_control_mode {
+        __u8     status;
+        __u8     mode;
+} __packed;
+
 #define HCI_OP_WRITE_LE_HOST_SUPPORTED  0x0c6d
 struct hci_cp_write_le_host_supported {
         __u8 le;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index e7b2e25397d7..44f130f6fb5e 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -170,6 +170,8 @@ struct hci_dev {
         __u32           amp_max_flush_to;
         __u32           amp_be_flush_to;
 
+        __u8            flow_ctl_mode;
+
         unsigned int    auto_accept_delay;
 
         unsigned long   quirks;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 980da08e253e..ab4922831b9a 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -717,6 +717,21 @@ static void hci_cc_read_local_ext_features(struct hci_dev *hdev,
         hci_req_complete(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES, rp->status);
 }
 
+static void hci_cc_read_flow_control_mode(struct hci_dev *hdev,
+                                                struct sk_buff *skb)
+{
+        struct hci_rp_read_flow_control_mode *rp = (void *) skb->data;
+
+        BT_DBG("%s status 0x%x", hdev->name, rp->status);
+
+        if (rp->status)
+                return;
+
+        hdev->flow_ctl_mode = rp->mode;
+
+        hci_req_complete(hdev, HCI_OP_READ_FLOW_CONTROL_MODE, rp->status);
+}
+
 static void hci_cc_read_buffer_size(struct hci_dev *hdev, struct sk_buff *skb)
 {
         struct hci_rp_read_buffer_size *rp = (void *) skb->data;
@@ -1998,6 +2013,10 @@ static inline void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *sk
                 hci_cc_write_ca_timeout(hdev, skb);
                 break;
 
+        case HCI_OP_READ_FLOW_CONTROL_MODE:
+                hci_cc_read_flow_control_mode(hdev, skb);
+                break;
+
         case HCI_OP_READ_LOCAL_AMP_INFO:
                 hci_cc_read_local_amp_info(hdev, skb);
                 break;