xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

networking: make skb_put & friends return void pointers

Browse Source 
It seems like a historic accident that these return unsigned char *,
and in many places that means casts are required, more often than not.

Make these functions (skb_put, __skb_put and pskb_put) return void *
and remove all the casts across the tree, adding a (u8 *) cast only
where the unsigned char pointer was used directly, all done with the
following spatch:

    @@
    expression SKB, LEN;
    typedef u8;
    identifier fn = { skb_put, __skb_put };
    @@
    - *(fn(SKB, LEN))
    + *(u8 *)fn(SKB, LEN)

    @@
    expression E, SKB, LEN;
    identifier fn = { skb_put, __skb_put };
    type T;
    @@
    - E = ((T *)(fn(SKB, LEN)))
    + E = fn(SKB, LEN)

which actually doesn't cover pskb_put since there are only three
users overall.

A handful of stragglers were converted manually, notably a macro in
drivers/isdn/i4l/isdn_bsdcomp.c and, oddly enough, one of the many
instances in net/bluetooth/hci_sock.c. In the former file, I also
had to fix one whitespace problem spatch introduced.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg
2017-06-16 14:29:21 +02:00
committed by David S. Miller
parent 59ae1d127a
commit 4df864c1d9
145 changed files with 486 additions and 547 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
net/nfc/digital_core.c
View File

@@ -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);
*skb_put(skb, 1) = crc & 0xFF;
*skb_put(skb, 1) = (crc >> 8) & 0xFF;
*(u8 *)skb_put(skb, 1) = crc & 0xFF;
*(u8 *)skb_put(skb, 1) = (crc >> 8) & 0xFF;
}
int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func,

2
net/nfc/digital_dep.c
View File

@@ -654,7 +654,7 @@ static int digital_in_send_rtox(struct nfc_digital_dev *ddev,
if (!skb)
return -ENOMEM;
*skb_put(skb, 1) = rtox;
*(u8 *)skb_put(skb, 1) = rtox;
skb_push(skb, sizeof(struct digital_dep_req_res));

18
net/nfc/digital_technology.c
View File

@@ -266,8 +266,8 @@ static int digital_in_send_rats(struct nfc_digital_dev *ddev,
if (!skb)
return -ENOMEM;
*skb_put(skb, 1) = DIGITAL_RATS_BYTE1;
*skb_put(skb, 1) = DIGITAL_RATS_PARAM;
*(u8 *)skb_put(skb, 1) = DIGITAL_RATS_BYTE1;
*(u8 *)skb_put(skb, 1) = 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;
*skb_put(skb, sizeof(u8)) = sel_cmd;
*skb_put(skb, sizeof(u8)) = DIGITAL_SDD_REQ_SEL_PAR;
*(u8 *)skb_put(skb, sizeof(u8)) = sel_cmd;
*(u8 *)skb_put(skb, sizeof(u8)) = 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;
*skb_put(skb, sizeof(u8)) = DIGITAL_CMD_SENS_REQ;
*(u8 *)skb_put(skb, sizeof(u8)) = DIGITAL_CMD_SENS_REQ;
rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL);
if (rc)
@@ -625,8 +625,7 @@ static int digital_in_send_attrib_req(struct nfc_digital_dev *ddev,
if (!skb)
return -ENOMEM;
attrib_req = (struct digital_attrib_req *)skb_put(skb,
sizeof(*attrib_req));
attrib_req = skb_put(skb, sizeof(*attrib_req));
attrib_req->cmd = DIGITAL_CMD_ATTRIB_REQ;
memcpy(attrib_req->nfcid0, sensb_res->nfcid0,
@@ -730,8 +729,7 @@ int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech)
if (!skb)
return -ENOMEM;
sensb_req = (struct digital_sensb_req *)skb_put(skb,
sizeof(*sensb_req));
sensb_req = skb_put(skb, sizeof(*sensb_req));
sensb_req->cmd = DIGITAL_CMD_SENSB_REQ;
sensb_req->afi = 0x00; /* All families and sub-families */
@@ -939,7 +937,7 @@ static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev)
if (!skb)
return -ENOMEM;
*skb_put(skb, 1) = DIGITAL_SEL_RES_NFC_DEP;
*(u8 *)skb_put(skb, 1) = DIGITAL_SEL_RES_NFC_DEP;
if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
digital_skb_add_crc_a(skb);

2
net/nfc/hci/core.c
View File

@@ -874,7 +874,7 @@ static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb)
return;
}
*skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe;
*(u8 *)skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe;
skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN;

4
net/nfc/hci/llc_shdlc.c
View File

@@ -382,8 +382,8 @@ static int llc_shdlc_connect_initiate(struct llc_shdlc *shdlc)
if (skb == NULL)
return -ENOMEM;
*skb_put(skb, 1) = SHDLC_MAX_WINDOW;
*skb_put(skb, 1) = SHDLC_SREJ_SUPPORT ? 1 : 0;
*(u8 *)skb_put(skb, 1) = SHDLC_MAX_WINDOW;
*(u8 *)skb_put(skb, 1) = SHDLC_SREJ_SUPPORT ? 1 : 0;
return llc_shdlc_send_u_frame(shdlc, skb, U_FRAME_RSET);
}

2
net/nfc/nci/core.c
View File

@@ -1341,7 +1341,7 @@ int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload)
return -ENOMEM;
}
hdr = (struct nci_ctrl_hdr *) skb_put(skb, NCI_CTRL_HDR_SIZE);
hdr = skb_put(skb, NCI_CTRL_HDR_SIZE);
hdr->gid = nci_opcode_gid(opcode);
hdr->oid = nci_opcode_oid(opcode);
hdr->plen = plen;

2
net/nfc/nci/hci.c
View File

@@ -472,7 +472,7 @@ void nci_hci_data_received_cb(void *context,
return;
}
*skb_put(hcp_skb, NCI_HCI_HCP_PACKET_HEADER_LEN) = pipe;
*(u8 *)skb_put(hcp_skb, NCI_HCI_HCP_PACKET_HEADER_LEN) = pipe;
skb_queue_walk(&ndev->hci_dev->rx_hcp_frags, frag_skb) {
msg_len = frag_skb->len - NCI_HCI_HCP_PACKET_HEADER_LEN;

8
net/nfc/nci/spi.c
View File

@@ -86,8 +86,8 @@ int nci_spi_send(struct nci_spi *nspi,
u16 crc;
crc = crc_ccitt(CRC_INIT, skb->data, skb->len);
*skb_put(skb, 1) = crc >> 8;
*skb_put(skb, 1) = crc & 0xFF;
*(u8 *)skb_put(skb, 1) = crc >> 8;
*(u8 *)skb_put(skb, 1) = 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);
*skb_put(skb, 1) = crc >> 8;
*skb_put(skb, 1) = crc & 0xFF;
*(u8 *)skb_put(skb, 1) = crc >> 8;
*(u8 *)skb_put(skb, 1) = crc & 0xFF;
ret = __nci_spi_send(nspi, skb, 0);

2
net/nfc/nci/uart.c
View File

@@ -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) {
*skb_put(nu->rx_skb, 1) = *data++;
*(u8 *)skb_put(nu->rx_skb, 1) = *data++;
--count;
continue;
}