From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
If user space attempts to set the local name to the same value that's
already set we should simply return a direct command complete for this
mgmt command.
Signed-off-by: Johan Hedberg <johan.hedberg@xxxxxxxxx>
---
net/bluetooth/mgmt.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index b704148..9ea0505 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -2382,6 +2382,17 @@ static int set_local_name(struct sock *sk, struct hci_dev *hdev, void *data,
hci_dev_lock(hdev);
+ /* If the old values are the same as the new ones just return a
+ * direct command complete event.
+ */
+ if (!memcmp(hdev->dev_name, cp->name, sizeof(hdev->dev_name)) &&
+ !memcmp(hdev->short_name, cp->short_name,
+ sizeof(hdev->short_name))) {
+ err = cmd_complete(sk, hdev->id, MGMT_OP_SET_LOCAL_NAME, 0,
+ data, len);
+ goto failed;
+ }
+
memcpy(hdev->short_name, cp->short_name, sizeof(hdev->short_name));
if (!hdev_is_powered(hdev)) {
--
1.7.10.4
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