Bluetooth: hidp: Let hidp_send_message return number of queued bytes

Let hidp_send_message return the number of successfully queued bytes
instead of an unconditional 0.

With the return value fixed to 0, other drivers relying on hidp, such as
hidraw, can not return meaningful values from their respective
implementations of write(). In particular, with the current behavior, a
hidraw device's write() will have different return values depending on
whether the device is connected via USB or Bluetooth, which makes it
harder to abstract away the transport layer.

Signed-off-by: Fabian Henneke <fabian.henneke@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index 5abd423b55fa9c3839eb37d412c16a8735f901a5..8d889969ae7edaf2acf653098aaae0d98618776b 100644 (file)
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -101,6 +101,7 @@ static int hidp_send_message(struct hidp_session *session, struct socket *sock,
 {
        struct sk_buff *skb;
        struct sock *sk = sock->sk;
+       int ret;
 
        BT_DBG("session %p data %p size %d", session, data, size);
 
@@ -114,13 +115,17 @@ static int hidp_send_message(struct hidp_session *session, struct socket *sock,
        }
 
        skb_put_u8(skb, hdr);
-       if (data && size > 0)
+       if (data && size > 0) {
                skb_put_data(skb, data, size);
+               ret = size;
+       } else {
+               ret = 0;
+       }
 
        skb_queue_tail(transmit, skb);
        wake_up_interruptible(sk_sleep(sk));
 
-       return 0;
+       return ret;
 }
 
 static int hidp_send_ctrl_message(struct hidp_session *session,