Bluetooth: Expose default supervision timeout setting via debugfs

The controller has a default value for the supervision timeout. Expose
this via debugfs for testing purposes.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 79d292cfb867..6c28687c9286 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -879,6 +879,34 @@ static int conn_latency_get(void *data, u64 *val)
 DEFINE_SIMPLE_ATTRIBUTE(conn_latency_fops, conn_latency_get,
                         conn_latency_set, "%llu\n");
 
+static int supervision_timeout_set(void *data, u64 val)
+{
+        struct hci_dev *hdev = data;
+
+        if (val < 0x000a || val > 0x0c80)
+                return -EINVAL;
+
+        hci_dev_lock(hdev);
+        hdev->le_supv_timeout = val;
+        hci_dev_unlock(hdev);
+
+        return 0;
+}
+
+static int supervision_timeout_get(void *data, u64 *val)
+{
+        struct hci_dev *hdev = data;
+
+        hci_dev_lock(hdev);
+        *val = hdev->le_supv_timeout;
+        hci_dev_unlock(hdev);
+
+        return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(supervision_timeout_fops, supervision_timeout_get,
+                        supervision_timeout_set, "%llu\n");
+
 static int adv_channel_map_set(void *data, u64 val)
 {
         struct hci_dev *hdev = data;
@@ -1738,6 +1766,8 @@ static int __hci_init(struct hci_dev *hdev)
                                     hdev, &conn_max_interval_fops);
                 debugfs_create_file("conn_latency", 0644, hdev->debugfs,
                                     hdev, &conn_latency_fops);
+                debugfs_create_file("supervision_timeout", 0644, hdev->debugfs,
+                                    hdev, &supervision_timeout_fops);
                 debugfs_create_file("adv_channel_map", 0644, hdev->debugfs,
                                     hdev, &adv_channel_map_fops);
                 debugfs_create_file("device_list", 0444, hdev->debugfs, hdev,