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authorJohannes Berg <johannes.berg@intel.com>2017-06-16 14:29:24 +0200
committerDavid S. Miller <davem@davemloft.net>2017-06-16 11:48:40 -0400
commit634fef61076d644b989b86abc2f560d81a089a31 (patch)
tree41e0cfc0c640666a75ad07588df34addb18176d0 /net/nfc
parentd58ff35122847a83ba55394e2ae3a1527b6febf5 (diff)
downloadlinux-634fef61076d644b989b86abc2f560d81a089a31.tar.bz2
networking: add and use skb_put_u8()
Joe and Bjørn suggested that it'd be nicer to not have the cast in the fairly common case of doing *(u8 *)skb_put(skb, 1) = c; Add skb_put_u8() for this case, and use it across the code, using the following spatch: @@ expression SKB, C, S; typedef u8; identifier fn = {skb_put}; fresh identifier fn2 = fn ## "_u8"; @@ - *(u8 *)fn(SKB, S) = C; + fn2(SKB, C); Note that due to the "S", the spatch isn't perfect, it should have checked that S is 1, but there's also places that use a sizeof expression like sizeof(var) or sizeof(u8) etc. Turns out that nobody ever did something like *(u8 *)skb_put(skb, 2) = c; which would be wrong anyway since the second byte wouldn't be initialized. Suggested-by: Joe Perches <joe@perches.com> Suggested-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/digital_core.c4
-rw-r--r--net/nfc/digital_dep.c2
-rw-r--r--net/nfc/digital_technology.c12
-rw-r--r--net/nfc/hci/core.c2
-rw-r--r--net/nfc/hci/llc_shdlc.c4
-rw-r--r--net/nfc/nci/hci.c2
-rw-r--r--net/nfc/nci/spi.c8
-rw-r--r--net/nfc/nci/uart.c2
8 files changed, 18 insertions, 18 deletions
diff --git a/net/nfc/digital_core.c b/net/nfc/digital_core.c
index fec47a7d0092..ebeace7a8278 100644
--- a/net/nfc/digital_core.c
+++ b/net/nfc/digital_core.c
@@ -74,8 +74,8 @@ void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init,
if (msb_first)
crc = __fswab16(crc);
- *(u8 *)skb_put(skb, 1) = crc & 0xFF;
- *(u8 *)skb_put(skb, 1) = (crc >> 8) & 0xFF;
+ skb_put_u8(skb, crc & 0xFF);
+ skb_put_u8(skb, (crc >> 8) & 0xFF);
}
int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func,
diff --git a/net/nfc/digital_dep.c b/net/nfc/digital_dep.c
index f948fc2099d2..74ccc2dd79d0 100644
--- a/net/nfc/digital_dep.c
+++ b/net/nfc/digital_dep.c
@@ -654,7 +654,7 @@ static int digital_in_send_rtox(struct nfc_digital_dev *ddev,
if (!skb)
return -ENOMEM;
- *(u8 *)skb_put(skb, 1) = rtox;
+ skb_put_u8(skb, rtox);
skb_push(skb, sizeof(struct digital_dep_req_res));
diff --git a/net/nfc/digital_technology.c b/net/nfc/digital_technology.c
index 492204e440ec..3cc3448da524 100644
--- a/net/nfc/digital_technology.c
+++ b/net/nfc/digital_technology.c
@@ -266,8 +266,8 @@ static int digital_in_send_rats(struct nfc_digital_dev *ddev,
if (!skb)
return -ENOMEM;
- *(u8 *)skb_put(skb, 1) = DIGITAL_RATS_BYTE1;
- *(u8 *)skb_put(skb, 1) = DIGITAL_RATS_PARAM;
+ skb_put_u8(skb, DIGITAL_RATS_BYTE1);
+ skb_put_u8(skb, DIGITAL_RATS_PARAM);
rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_ats,
target);
@@ -470,8 +470,8 @@ static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev,
else
sel_cmd = DIGITAL_CMD_SEL_REQ_CL3;
- *(u8 *)skb_put(skb, sizeof(u8)) = sel_cmd;
- *(u8 *)skb_put(skb, sizeof(u8)) = DIGITAL_SDD_REQ_SEL_PAR;
+ skb_put_u8(skb, sel_cmd);
+ skb_put_u8(skb, DIGITAL_SDD_REQ_SEL_PAR);
return digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res,
target);
@@ -541,7 +541,7 @@ int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech)
if (!skb)
return -ENOMEM;
- *(u8 *)skb_put(skb, sizeof(u8)) = DIGITAL_CMD_SENS_REQ;
+ skb_put_u8(skb, DIGITAL_CMD_SENS_REQ);
rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL);
if (rc)
@@ -937,7 +937,7 @@ static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev)
if (!skb)
return -ENOMEM;
- *(u8 *)skb_put(skb, 1) = DIGITAL_SEL_RES_NFC_DEP;
+ skb_put_u8(skb, DIGITAL_SEL_RES_NFC_DEP);
if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
digital_skb_add_crc_a(skb);
diff --git a/net/nfc/hci/core.c b/net/nfc/hci/core.c
index 7b2bdda1514c..b740fef0acc5 100644
--- a/net/nfc/hci/core.c
+++ b/net/nfc/hci/core.c
@@ -874,7 +874,7 @@ static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb)
return;
}
- *(u8 *)skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe;
+ skb_put_u8(hcp_skb, pipe);
skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN;
diff --git a/net/nfc/hci/llc_shdlc.c b/net/nfc/hci/llc_shdlc.c
index 5bd4529279f5..17e59a009ce6 100644
--- a/net/nfc/hci/llc_shdlc.c
+++ b/net/nfc/hci/llc_shdlc.c
@@ -382,8 +382,8 @@ static int llc_shdlc_connect_initiate(struct llc_shdlc *shdlc)
if (skb == NULL)
return -ENOMEM;
- *(u8 *)skb_put(skb, 1) = SHDLC_MAX_WINDOW;
- *(u8 *)skb_put(skb, 1) = SHDLC_SREJ_SUPPORT ? 1 : 0;
+ skb_put_u8(skb, SHDLC_MAX_WINDOW);
+ skb_put_u8(skb, SHDLC_SREJ_SUPPORT ? 1 : 0);
return llc_shdlc_send_u_frame(shdlc, skb, U_FRAME_RSET);
}
diff --git a/net/nfc/nci/hci.c b/net/nfc/nci/hci.c
index 3f93df58d9f1..ddfc52ac1f9b 100644
--- a/net/nfc/nci/hci.c
+++ b/net/nfc/nci/hci.c
@@ -472,7 +472,7 @@ void nci_hci_data_received_cb(void *context,
return;
}
- *(u8 *)skb_put(hcp_skb, NCI_HCI_HCP_PACKET_HEADER_LEN) = pipe;
+ skb_put_u8(hcp_skb, pipe);
skb_queue_walk(&ndev->hci_dev->rx_hcp_frags, frag_skb) {
msg_len = frag_skb->len - NCI_HCI_HCP_PACKET_HEADER_LEN;
diff --git a/net/nfc/nci/spi.c b/net/nfc/nci/spi.c
index 3b4512731a2f..452f4c16b7a9 100644
--- a/net/nfc/nci/spi.c
+++ b/net/nfc/nci/spi.c
@@ -86,8 +86,8 @@ int nci_spi_send(struct nci_spi *nspi,
u16 crc;
crc = crc_ccitt(CRC_INIT, skb->data, skb->len);
- *(u8 *)skb_put(skb, 1) = crc >> 8;
- *(u8 *)skb_put(skb, 1) = crc & 0xFF;
+ skb_put_u8(skb, crc >> 8);
+ skb_put_u8(skb, crc & 0xFF);
}
if (write_handshake_completion) {
@@ -172,8 +172,8 @@ static int send_acknowledge(struct nci_spi *nspi, u8 acknowledge)
hdr[3] = 0;
crc = crc_ccitt(CRC_INIT, skb->data, skb->len);
- *(u8 *)skb_put(skb, 1) = crc >> 8;
- *(u8 *)skb_put(skb, 1) = crc & 0xFF;
+ skb_put_u8(skb, crc >> 8);
+ skb_put_u8(skb, crc & 0xFF);
ret = __nci_spi_send(nspi, skb, 0);
diff --git a/net/nfc/nci/uart.c b/net/nfc/nci/uart.c
index 442f8eadfc76..8d104c1db628 100644
--- a/net/nfc/nci/uart.c
+++ b/net/nfc/nci/uart.c
@@ -355,7 +355,7 @@ static int nci_uart_default_recv_buf(struct nci_uart *nu, const u8 *data,
/* Eat byte after byte till full packet header is received */
if (nu->rx_skb->len < NCI_CTRL_HDR_SIZE) {
- *(u8 *)skb_put(nu->rx_skb, 1) = *data++;
+ skb_put_u8(nu->rx_skb, *data++);
--count;
continue;
}