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/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c
index 910ec96..d880f4e 100644
--- a/drivers/bluetooth/hci_bcsp.c
+++ b/drivers/bluetooth/hci_bcsp.c
@@ -125,7 +125,7 @@ static void bcsp_slip_msgdelim(struct sk_buff *skb)
{
const char pkt_delim = 0xc0;
- memcpy(skb_put(skb, 1), &pkt_delim, 1);
+ skb_put_data(skb, &pkt_delim, 1);
}
static void bcsp_slip_one_byte(struct sk_buff *skb, u8 c)
@@ -135,13 +135,13 @@ static void bcsp_slip_one_byte(struct sk_buff *skb, u8 c)
switch (c) {
case 0xc0:
- memcpy(skb_put(skb, 2), &esc_c0, 2);
+ skb_put_data(skb, &esc_c0, 2);
break;
case 0xdb:
- memcpy(skb_put(skb, 2), &esc_db, 2);
+ skb_put_data(skb, &esc_db, 2);
break;
default:
- memcpy(skb_put(skb, 1), &c, 1);
+ skb_put_data(skb, &c, 1);
}
}
@@ -423,7 +423,7 @@ static void bcsp_handle_le_pkt(struct hci_uart *hu)
BT_DBG("Found a LE conf pkt");
if (!nskb)
return;
- memcpy(skb_put(nskb, 4), conf_rsp_pkt, 4);
+ skb_put_data(nskb, conf_rsp_pkt, 4);
hci_skb_pkt_type(nskb) = BCSP_LE_PKT;
skb_queue_head(&bcsp->unrel, nskb);
@@ -447,7 +447,7 @@ static inline void bcsp_unslip_one_byte(struct bcsp_struct *bcsp, unsigned char
bcsp->rx_esc_state = BCSP_ESCSTATE_ESC;
break;
default:
- memcpy(skb_put(bcsp->rx_skb, 1), &byte, 1);
+ skb_put_data(bcsp->rx_skb, &byte, 1);
if ((bcsp->rx_skb->data[0] & 0x40) != 0 &&
bcsp->rx_state != BCSP_W4_CRC)
bcsp_crc_update(&bcsp->message_crc, byte);
@@ -458,7 +458,7 @@ static inline void bcsp_unslip_one_byte(struct bcsp_struct *bcsp, unsigned char
case BCSP_ESCSTATE_ESC:
switch (byte) {
case 0xdc:
- memcpy(skb_put(bcsp->rx_skb, 1), &c0, 1);
+ skb_put_data(bcsp->rx_skb, &c0, 1);
if ((bcsp->rx_skb->data[0] & 0x40) != 0 &&
bcsp->rx_state != BCSP_W4_CRC)
bcsp_crc_update(&bcsp->message_crc, 0xc0);
@@ -467,7 +467,7 @@ static inline void bcsp_unslip_one_byte(struct bcsp_struct *bcsp, unsigned char
break;
case 0xdd:
- memcpy(skb_put(bcsp->rx_skb, 1), &db, 1);
+ skb_put_data(bcsp->rx_skb, &db, 1);
if ((bcsp->rx_skb->data[0] & 0x40) != 0 &&
bcsp->rx_state != BCSP_W4_CRC)
bcsp_crc_update(&bcsp->message_crc, 0xdb);