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authorLuiz Augusto von Dentz <luiz.von.dentz@intel.com>2021-09-04 01:27:31 +0300
committerMarcel Holtmann <marcel@holtmann.org>2021-09-13 22:53:23 +0300
commit0771cbb3b97d3c1d68eecd7f00055f599954c34e (patch)
tree36b3c8f2a30daacf27064e7459b6b063341abc4b /net/bluetooth/sco.c
parent97e4e80299844bb5f6ce5a7540742ffbffae3d97 (diff)
downloadlinux-0771cbb3b97d3c1d68eecd7f00055f599954c34e.tar.xz
Bluetooth: SCO: Replace use of memcpy_from_msg with bt_skb_sendmsg
This makes use of bt_skb_sendmsg instead of allocating a different buffer to be used with memcpy_from_msg which cause one extra copy. Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/sco.c')
-rw-r--r--net/bluetooth/sco.c34
1 files changed, 11 insertions, 23 deletions
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index a7dd4650e142..446f871f11ed 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -281,27 +281,19 @@ static int sco_connect(struct hci_dev *hdev, struct sock *sk)
return err;
}
-static int sco_send_frame(struct sock *sk, void *buf, int len,
- unsigned int msg_flags)
+static int sco_send_frame(struct sock *sk, struct sk_buff *skb)
{
struct sco_conn *conn = sco_pi(sk)->conn;
- struct sk_buff *skb;
- int err;
/* Check outgoing MTU */
- if (len > conn->mtu)
+ if (skb->len > conn->mtu)
return -EINVAL;
- BT_DBG("sk %p len %d", sk, len);
+ BT_DBG("sk %p len %d", sk, skb->len);
- skb = bt_skb_send_alloc(sk, len, msg_flags & MSG_DONTWAIT, &err);
- if (!skb)
- return err;
-
- memcpy(skb_put(skb, len), buf, len);
hci_send_sco(conn->hcon, skb);
- return len;
+ return skb->len;
}
static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
@@ -728,7 +720,7 @@ static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
size_t len)
{
struct sock *sk = sock->sk;
- void *buf;
+ struct sk_buff *skb;
int err;
BT_DBG("sock %p, sk %p", sock, sk);
@@ -740,24 +732,20 @@ static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
if (msg->msg_flags & MSG_OOB)
return -EOPNOTSUPP;
- buf = kmalloc(len, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- if (memcpy_from_msg(buf, msg, len)) {
- kfree(buf);
- return -EFAULT;
- }
+ skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
+ if (IS_ERR_OR_NULL(skb))
+ return PTR_ERR(skb);
lock_sock(sk);
if (sk->sk_state == BT_CONNECTED)
- err = sco_send_frame(sk, buf, len, msg->msg_flags);
+ err = sco_send_frame(sk, skb);
else
err = -ENOTCONN;
release_sock(sk);
- kfree(buf);
+ if (err)
+ kfree_skb(skb);
return err;
}