networking: introduce and use skb_put_data()
A common pattern with skb_put() is to just want to memcpy()
some data into the new space, introduce skb_put_data() for
this.
An spatch similar to the one for skb_put_zero() converts many
of the places using it:
@@
identifier p, p2;
expression len, skb, data;
type t, t2;
@@
(
-p = skb_put(skb, len);
+p = skb_put_data(skb, data, len);
|
-p = (t)skb_put(skb, len);
+p = skb_put_data(skb, data, len);
)
(
p2 = (t2)p;
-memcpy(p2, data, len);
|
-memcpy(p, data, len);
)
@@
type t, t2;
identifier p, p2;
expression skb, data;
@@
t *p;
...
(
-p = skb_put(skb, sizeof(t));
+p = skb_put_data(skb, data, sizeof(t));
|
-p = (t *)skb_put(skb, sizeof(t));
+p = skb_put_data(skb, data, sizeof(t));
)
(
p2 = (t2)p;
-memcpy(p2, data, sizeof(*p));
|
-memcpy(p, data, sizeof(*p));
)
@@
expression skb, len, data;
@@
-memcpy(skb_put(skb, len), data, len);
+skb_put_data(skb, data, len);
(again, manually post-processed to retain some comments)
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index bfd5f4b..c7ea398 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -478,7 +478,7 @@ static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
}
len = min_t(uint, hci_skb_expect(skb), count);
- memcpy(skb_put(skb, len), buffer, len);
+ skb_put_data(skb, buffer, len);
count -= len;
buffer += len;
@@ -533,7 +533,7 @@ static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
}
len = min_t(uint, hci_skb_expect(skb), count);
- memcpy(skb_put(skb, len), buffer, len);
+ skb_put_data(skb, buffer, len);
count -= len;
buffer += len;
@@ -590,7 +590,7 @@ static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
}
len = min_t(uint, hci_skb_expect(skb), count);
- memcpy(skb_put(skb, len), buffer, len);
+ skb_put_data(skb, buffer, len);
count -= len;
buffer += len;
@@ -934,8 +934,8 @@ static void btusb_diag_complete(struct urb *urb)
skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
if (skb) {
- memcpy(skb_put(skb, urb->actual_length),
- urb->transfer_buffer, urb->actual_length);
+ skb_put_data(skb, urb->transfer_buffer,
+ urb->actual_length);
hci_recv_diag(hdev, skb);
}
} else if (urb->status == -ENOENT) {
@@ -2395,7 +2395,7 @@ static int marvell_config_oob_wake(struct hci_dev *hdev)
return -ENOMEM;
}
- memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
+ skb_put_data(skb, cmd, sizeof(cmd));
hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
ret = btusb_send_frame(hdev, skb);