From 59ae1d127ac0ae404baf414c434ba2651b793f46 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 16 Jun 2017 14:29:20 +0200 Subject: 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 Signed-off-by: Johannes Berg Signed-off-by: David S. Miller --- net/nfc/nci/core.c | 4 ++-- net/nfc/nci/data.c | 2 +- net/nfc/nci/hci.c | 7 ++++--- net/nfc/nci/uart.c | 2 +- 4 files changed, 8 insertions(+), 7 deletions(-) (limited to 'net/nfc/nci') diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c index 61fff422424f..17b9f1ce23db 100644 --- a/net/nfc/nci/core.c +++ b/net/nfc/nci/core.c @@ -462,7 +462,7 @@ int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len, return -ENOMEM; skb_reserve(skb, NCI_DATA_HDR_SIZE); - memcpy(skb_put(skb, data_len), data, data_len); + skb_put_data(skb, data, data_len); loopback_data.conn_id = conn_id; loopback_data.data = skb; @@ -1350,7 +1350,7 @@ int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload) nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST); if (plen) - memcpy(skb_put(skb, plen), payload, plen); + skb_put_data(skb, payload, plen); skb_queue_tail(&ndev->cmd_q, skb); queue_work(ndev->cmd_wq, &ndev->cmd_work); diff --git a/net/nfc/nci/data.c b/net/nfc/nci/data.c index dbd24254412a..2488d9241f1d 100644 --- a/net/nfc/nci/data.c +++ b/net/nfc/nci/data.c @@ -138,7 +138,7 @@ static int nci_queue_tx_data_frags(struct nci_dev *ndev, skb_reserve(skb_frag, NCI_DATA_HDR_SIZE); /* first, copy the data */ - memcpy(skb_put(skb_frag, frag_len), data, frag_len); + skb_put_data(skb_frag, data, frag_len); /* second, set the header */ nci_push_data_hdr(ndev, conn_id, skb_frag, diff --git a/net/nfc/nci/hci.c b/net/nfc/nci/hci.c index a0ab26d535dc..d4a53ce818c3 100644 --- a/net/nfc/nci/hci.c +++ b/net/nfc/nci/hci.c @@ -187,7 +187,7 @@ static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe, *skb_push(skb, 1) = cb; if (len > 0) - memcpy(skb_put(skb, len), data + i, len); + skb_put_data(skb, data + i, len); r = nci_send_data(ndev, conn_info->conn_id, skb); if (r < 0) @@ -476,8 +476,9 @@ void nci_hci_data_received_cb(void *context, skb_queue_walk(&ndev->hci_dev->rx_hcp_frags, frag_skb) { msg_len = frag_skb->len - NCI_HCI_HCP_PACKET_HEADER_LEN; - memcpy(skb_put(hcp_skb, msg_len), frag_skb->data + - NCI_HCI_HCP_PACKET_HEADER_LEN, msg_len); + skb_put_data(hcp_skb, + frag_skb->data + NCI_HCI_HCP_PACKET_HEADER_LEN, + msg_len); } skb_queue_purge(&ndev->hci_dev->rx_hcp_frags); diff --git a/net/nfc/nci/uart.c b/net/nfc/nci/uart.c index c468eabd6943..cfa7f352c1c3 100644 --- a/net/nfc/nci/uart.c +++ b/net/nfc/nci/uart.c @@ -371,7 +371,7 @@ static int nci_uart_default_recv_buf(struct nci_uart *nu, const u8 *data, chunk_len = nu->rx_packet_len - nu->rx_skb->len; if (count < chunk_len) chunk_len = count; - memcpy(skb_put(nu->rx_skb, chunk_len), data, chunk_len); + skb_put_data(nu->rx_skb, data, chunk_len); data += chunk_len; count -= chunk_len; -- cgit v1.2.3