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authorJohannes Berg <johannes.berg@intel.com>2017-06-16 14:29:20 +0200
committerDavid S. Miller <davem@davemloft.net>2017-06-16 17:48:37 +0200
commit59ae1d127ac0ae404baf414c434ba2651b793f46 (patch)
tree043e71496aa7a7db86bcc8219a3a51f533aac982 /net/nfc/llcp_commands.c
parentnetworking: convert many more places to skb_put_zero() (diff)
downloadlinux-59ae1d127ac0ae404baf414c434ba2651b793f46.tar.xz
linux-59ae1d127ac0ae404baf414c434ba2651b793f46.zip
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>
Diffstat (limited to 'net/nfc/llcp_commands.c')
-rw-r--r--net/nfc/llcp_commands.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/net/nfc/llcp_commands.c b/net/nfc/llcp_commands.c
index c5959ce503e6..367d8c027101 100644
--- a/net/nfc/llcp_commands.c
+++ b/net/nfc/llcp_commands.c
@@ -298,7 +298,7 @@ static struct sk_buff *llcp_add_header(struct sk_buff *pdu,
pr_debug("header 0x%x 0x%x\n", header[0], header[1]);
- memcpy(skb_put(pdu, LLCP_HEADER_SIZE), header, LLCP_HEADER_SIZE);
+ skb_put_data(pdu, header, LLCP_HEADER_SIZE);
return pdu;
}
@@ -311,7 +311,7 @@ static struct sk_buff *llcp_add_tlv(struct sk_buff *pdu, u8 *tlv,
if (tlv == NULL)
return NULL;
- memcpy(skb_put(pdu, tlv_length), tlv, tlv_length);
+ skb_put_data(pdu, tlv, tlv_length);
return pdu;
}
@@ -549,7 +549,7 @@ int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local,
return PTR_ERR(skb);
hlist_for_each_entry_safe(sdp, n, tlv_list, node) {
- memcpy(skb_put(skb, sdp->tlv_len), sdp->tlv, sdp->tlv_len);
+ skb_put_data(skb, sdp->tlv, sdp->tlv_len);
hlist_del(&sdp->node);
@@ -581,8 +581,7 @@ int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local,
hlist_for_each_entry_safe(sdreq, n, tlv_list, node) {
pr_debug("tid %d for %s\n", sdreq->tid, sdreq->uri);
- memcpy(skb_put(skb, sdreq->tlv_len), sdreq->tlv,
- sdreq->tlv_len);
+ skb_put_data(skb, sdreq->tlv, sdreq->tlv_len);
hlist_del(&sdreq->node);
@@ -622,7 +621,7 @@ int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason)
skb = llcp_add_header(skb, dsap, ssap, LLCP_PDU_DM);
- memcpy(skb_put(skb, 1), &reason, 1);
+ skb_put_data(skb, &reason, 1);
skb_queue_head(&local->tx_queue, skb);
@@ -693,7 +692,7 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
skb_put(pdu, LLCP_SEQUENCE_SIZE);
if (likely(frag_len > 0))
- memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
+ skb_put_data(pdu, msg_ptr, frag_len);
skb_queue_tail(&sock->tx_queue, pdu);
@@ -759,7 +758,7 @@ int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
pdu = llcp_add_header(pdu, dsap, ssap, LLCP_PDU_UI);
if (likely(frag_len > 0))
- memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
+ skb_put_data(pdu, msg_ptr, frag_len);
/* No need to check for the peer RW for UI frames */
skb_queue_tail(&local->tx_queue, pdu);