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Message-Id: <20210730065625.34010-7-krzysztof.kozlowski@canonical.com>
Date: Fri, 30 Jul 2021 08:56:23 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>, linux-nfc@...ts.01.org,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 6/8] nfc: nci: constify several pointers to u8, sk_buff and other structs
Several functions receive pointers to u8, sk_buff or other structs but
do not modify the contents so make them const. This allows doing the
same for local variables and in total makes the code a little bit safer.
This makes const also data passed as "unsigned long opt" argument to
nci_request() function. Usual flow for such functions is:
1. Receive "u8 *" and store it (the pointer) in a structure
allocated on stack (e.g. struct nci_set_config_param),
2. Call nci_request() or __nci_request() passing a callback function an
the pointer to the structure via an "unsigned long opt",
3. nci_request() calls the callback which dereferences "unsigned long
opt" in a read-only way.
This converts all above paths to use proper pointer to const data, so
entire flow is safer.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
---
include/net/nfc/nci_core.h | 14 ++++---
net/nfc/nci/core.c | 40 +++++++++---------
net/nfc/nci/data.c | 12 +++---
net/nfc/nci/hci.c | 24 +++++------
net/nfc/nci/ntf.c | 83 +++++++++++++++++++++-----------------
net/nfc/nci/rsp.c | 46 +++++++++++----------
net/nfc/nci/spi.c | 2 +-
7 files changed, 118 insertions(+), 103 deletions(-)
diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h
index 00f2c60971d7..4770a81f4aa7 100644
--- a/include/net/nfc/nci_core.h
+++ b/include/net/nfc/nci_core.h
@@ -278,23 +278,25 @@ int nci_request(struct nci_dev *ndev,
void (*req)(struct nci_dev *ndev,
unsigned long opt),
unsigned long opt, __u32 timeout);
-int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload);
-int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len, __u8 *payload);
+int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len,
+ const __u8 *payload);
+int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len,
+ const __u8 *payload);
int nci_core_reset(struct nci_dev *ndev);
int nci_core_init(struct nci_dev *ndev);
int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb);
-int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val);
+int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, const __u8 *val);
int nci_nfcee_discover(struct nci_dev *ndev, u8 action);
int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode);
int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
u8 number_destination_params,
size_t params_len,
- struct core_conn_create_dest_spec_params *params);
+ const struct core_conn_create_dest_spec_params *params);
int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id);
-int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len,
+int nci_nfcc_loopback(struct nci_dev *ndev, const void *data, size_t data_len,
struct sk_buff **resp);
struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev);
@@ -378,7 +380,7 @@ void nci_req_complete(struct nci_dev *ndev, int result);
struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
int conn_id);
int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type,
- struct dest_spec_params *params);
+ const struct dest_spec_params *params);
/* ----- NCI status code ----- */
int nci_to_errno(__u8 code);
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index 400d66c4e210..774ddf957388 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -53,9 +53,9 @@ struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
}
int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type,
- struct dest_spec_params *params)
+ const struct dest_spec_params *params)
{
- struct nci_conn_info *conn_info;
+ const struct nci_conn_info *conn_info;
list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
if (conn_info->dest_type == dest_type) {
@@ -210,14 +210,15 @@ static void nci_init_complete_req(struct nci_dev *ndev, unsigned long opt)
}
struct nci_set_config_param {
- __u8 id;
- size_t len;
- __u8 *val;
+ __u8 id;
+ size_t len;
+ const __u8 *val;
};
static void nci_set_config_req(struct nci_dev *ndev, unsigned long opt)
{
- struct nci_set_config_param *param = (struct nci_set_config_param *)opt;
+ const struct nci_set_config_param *param =
+ (struct nci_set_config_param *)opt;
struct nci_core_set_config_cmd cmd;
BUG_ON(param->len > NCI_MAX_PARAM_LEN);
@@ -237,7 +238,7 @@ struct nci_rf_discover_param {
static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
{
- struct nci_rf_discover_param *param =
+ const struct nci_rf_discover_param *param =
(struct nci_rf_discover_param *)opt;
struct nci_rf_disc_cmd cmd;
@@ -303,7 +304,7 @@ struct nci_rf_discover_select_param {
static void nci_rf_discover_select_req(struct nci_dev *ndev, unsigned long opt)
{
- struct nci_rf_discover_select_param *param =
+ const struct nci_rf_discover_select_param *param =
(struct nci_rf_discover_select_param *)opt;
struct nci_rf_discover_select_cmd cmd;
@@ -341,18 +342,18 @@ static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt)
struct nci_cmd_param {
__u16 opcode;
size_t len;
- __u8 *payload;
+ const __u8 *payload;
};
static void nci_generic_req(struct nci_dev *ndev, unsigned long opt)
{
- struct nci_cmd_param *param =
+ const struct nci_cmd_param *param =
(struct nci_cmd_param *)opt;
nci_send_cmd(ndev, param->opcode, param->len, param->payload);
}
-int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload)
+int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, const __u8 *payload)
{
struct nci_cmd_param param;
@@ -365,7 +366,8 @@ int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload)
}
EXPORT_SYMBOL(nci_prop_cmd);
-int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len, __u8 *payload)
+int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len,
+ const __u8 *payload)
{
struct nci_cmd_param param;
@@ -399,7 +401,7 @@ struct nci_loopback_data {
static void nci_send_data_req(struct nci_dev *ndev, unsigned long opt)
{
- struct nci_loopback_data *data = (struct nci_loopback_data *)opt;
+ const struct nci_loopback_data *data = (struct nci_loopback_data *)opt;
nci_send_data(ndev, data->conn_id, data->data);
}
@@ -420,7 +422,7 @@ static void nci_nfcc_loopback_cb(void *context, struct sk_buff *skb, int err)
nci_req_complete(ndev, NCI_STATUS_OK);
}
-int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len,
+int nci_nfcc_loopback(struct nci_dev *ndev, const void *data, size_t data_len,
struct sk_buff **resp)
{
int r;
@@ -624,7 +626,7 @@ static int nci_dev_down(struct nfc_dev *nfc_dev)
return nci_close_device(ndev);
}
-int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val)
+int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, const __u8 *val)
{
struct nci_set_config_param param;
@@ -659,7 +661,7 @@ EXPORT_SYMBOL(nci_nfcee_discover);
static void nci_nfcee_mode_set_req(struct nci_dev *ndev, unsigned long opt)
{
- struct nci_nfcee_mode_set_cmd *cmd =
+ const struct nci_nfcee_mode_set_cmd *cmd =
(struct nci_nfcee_mode_set_cmd *)opt;
nci_send_cmd(ndev, NCI_OP_NFCEE_MODE_SET_CMD,
@@ -681,7 +683,7 @@ EXPORT_SYMBOL(nci_nfcee_mode_set);
static void nci_core_conn_create_req(struct nci_dev *ndev, unsigned long opt)
{
- struct core_conn_create_data *data =
+ const struct core_conn_create_data *data =
(struct core_conn_create_data *)opt;
nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, data->length, data->cmd);
@@ -690,7 +692,7 @@ static void nci_core_conn_create_req(struct nci_dev *ndev, unsigned long opt)
int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
u8 number_destination_params,
size_t params_len,
- struct core_conn_create_dest_spec_params *params)
+ const struct core_conn_create_dest_spec_params *params)
{
int r;
struct nci_core_conn_create_cmd *cmd;
@@ -863,7 +865,7 @@ static int nci_activate_target(struct nfc_dev *nfc_dev,
{
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
struct nci_rf_discover_select_param param;
- struct nfc_target *nci_target = NULL;
+ const struct nfc_target *nci_target = NULL;
int i;
int rc = 0;
diff --git a/net/nfc/nci/data.c b/net/nfc/nci/data.c
index ce3382be937f..6055dc9a82aa 100644
--- a/net/nfc/nci/data.c
+++ b/net/nfc/nci/data.c
@@ -26,7 +26,7 @@
void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
__u8 conn_id, int err)
{
- struct nci_conn_info *conn_info;
+ const struct nci_conn_info *conn_info;
data_exchange_cb_t cb;
void *cb_context;
@@ -80,7 +80,7 @@ static inline void nci_push_data_hdr(struct nci_dev *ndev,
int nci_conn_max_data_pkt_payload_size(struct nci_dev *ndev, __u8 conn_id)
{
- struct nci_conn_info *conn_info;
+ const struct nci_conn_info *conn_info;
conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
if (!conn_info)
@@ -93,9 +93,9 @@ EXPORT_SYMBOL(nci_conn_max_data_pkt_payload_size);
static int nci_queue_tx_data_frags(struct nci_dev *ndev,
__u8 conn_id,
struct sk_buff *skb) {
- struct nci_conn_info *conn_info;
+ const struct nci_conn_info *conn_info;
int total_len = skb->len;
- unsigned char *data = skb->data;
+ const unsigned char *data = skb->data;
unsigned long flags;
struct sk_buff_head frags_q;
struct sk_buff *skb_frag;
@@ -166,7 +166,7 @@ static int nci_queue_tx_data_frags(struct nci_dev *ndev,
/* Send NCI data */
int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb)
{
- struct nci_conn_info *conn_info;
+ const struct nci_conn_info *conn_info;
int rc = 0;
pr_debug("conn_id 0x%x, plen %d\n", conn_id, skb->len);
@@ -269,7 +269,7 @@ void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb)
__u8 pbf = nci_pbf(skb->data);
__u8 status = 0;
__u8 conn_id = nci_conn_id(skb->data);
- struct nci_conn_info *conn_info;
+ const struct nci_conn_info *conn_info;
pr_debug("len %d\n", skb->len);
diff --git a/net/nfc/nci/hci.c b/net/nfc/nci/hci.c
index d6732e5e8958..71a306b29735 100644
--- a/net/nfc/nci/hci.c
+++ b/net/nfc/nci/hci.c
@@ -142,7 +142,7 @@ static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe,
const u8 data_type, const u8 *data,
size_t data_len)
{
- struct nci_conn_info *conn_info;
+ const struct nci_conn_info *conn_info;
struct sk_buff *skb;
int len, i, r;
u8 cb = pipe;
@@ -197,7 +197,7 @@ static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe,
static void nci_hci_send_data_req(struct nci_dev *ndev, unsigned long opt)
{
- struct nci_data *data = (struct nci_data *)opt;
+ const struct nci_data *data = (struct nci_data *)opt;
nci_hci_send_data(ndev, data->pipe, data->cmd,
data->data, data->data_len);
@@ -221,8 +221,8 @@ int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate, u8 cmd,
const u8 *param, size_t param_len,
struct sk_buff **skb)
{
- struct nci_hcp_message *message;
- struct nci_conn_info *conn_info;
+ const struct nci_hcp_message *message;
+ const struct nci_conn_info *conn_info;
struct nci_data data;
int r;
u8 pipe = ndev->hci_dev->gate2pipe[gate];
@@ -406,7 +406,7 @@ static void nci_hci_msg_rx_work(struct work_struct *work)
struct nci_hci_dev *hdev =
container_of(work, struct nci_hci_dev, msg_rx_work);
struct sk_buff *skb;
- struct nci_hcp_message *message;
+ const struct nci_hcp_message *message;
u8 pipe, type, instruction;
while ((skb = skb_dequeue(&hdev->msg_rx_queue)) != NULL) {
@@ -498,7 +498,7 @@ void nci_hci_data_received_cb(void *context,
int nci_hci_open_pipe(struct nci_dev *ndev, u8 pipe)
{
struct nci_data data;
- struct nci_conn_info *conn_info;
+ const struct nci_conn_info *conn_info;
conn_info = ndev->hci_dev->conn_info;
if (!conn_info)
@@ -523,7 +523,7 @@ static u8 nci_hci_create_pipe(struct nci_dev *ndev, u8 dest_host,
u8 pipe;
struct sk_buff *skb;
struct nci_hci_create_pipe_params params;
- struct nci_hci_create_pipe_resp *resp;
+ const struct nci_hci_create_pipe_resp *resp;
pr_debug("gate=%d\n", dest_gate);
@@ -557,8 +557,8 @@ static int nci_hci_delete_pipe(struct nci_dev *ndev, u8 pipe)
int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx,
const u8 *param, size_t param_len)
{
- struct nci_hcp_message *message;
- struct nci_conn_info *conn_info;
+ const struct nci_hcp_message *message;
+ const struct nci_conn_info *conn_info;
struct nci_data data;
int r;
u8 *tmp;
@@ -605,8 +605,8 @@ EXPORT_SYMBOL(nci_hci_set_param);
int nci_hci_get_param(struct nci_dev *ndev, u8 gate, u8 idx,
struct sk_buff **skb)
{
- struct nci_hcp_message *message;
- struct nci_conn_info *conn_info;
+ const struct nci_hcp_message *message;
+ const struct nci_conn_info *conn_info;
struct nci_data data;
int r;
u8 pipe = ndev->hci_dev->gate2pipe[gate];
@@ -697,7 +697,7 @@ EXPORT_SYMBOL(nci_hci_connect_gate);
static int nci_hci_dev_connect_gates(struct nci_dev *ndev,
u8 gate_count,
- struct nci_hci_gate *gates)
+ const struct nci_hci_gate *gates)
{
int r;
diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c
index 98af04c86b2c..0a2ed25b9797 100644
--- a/net/nfc/nci/ntf.c
+++ b/net/nfc/nci/ntf.c
@@ -28,10 +28,10 @@
/* Handle NCI Notification packets */
static void nci_core_reset_ntf_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
/* Handle NCI 2.x core reset notification */
- struct nci_core_reset_ntf *ntf = (void *)skb->data;
+ const struct nci_core_reset_ntf *ntf = (void *)skb->data;
ndev->nci_ver = ntf->nci_ver;
pr_debug("nci_ver 0x%x, config_status 0x%x\n",
@@ -80,7 +80,7 @@ static void nci_core_conn_credits_ntf_packet(struct nci_dev *ndev,
}
static void nci_core_generic_error_ntf_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
__u8 status = skb->data[0];
@@ -107,9 +107,10 @@ static void nci_core_conn_intf_error_ntf_packet(struct nci_dev *ndev,
nci_data_exchange_complete(ndev, NULL, ntf->conn_id, -EIO);
}
-static __u8 *nci_extract_rf_params_nfca_passive_poll(struct nci_dev *ndev,
- struct rf_tech_specific_params_nfca_poll *nfca_poll,
- __u8 *data)
+static const __u8 *
+nci_extract_rf_params_nfca_passive_poll(struct nci_dev *ndev,
+ struct rf_tech_specific_params_nfca_poll *nfca_poll,
+ const __u8 *data)
{
nfca_poll->sens_res = __le16_to_cpu(*((__le16 *)data));
data += 2;
@@ -134,9 +135,10 @@ static __u8 *nci_extract_rf_params_nfca_passive_poll(struct nci_dev *ndev,
return data;
}
-static __u8 *nci_extract_rf_params_nfcb_passive_poll(struct nci_dev *ndev,
- struct rf_tech_specific_params_nfcb_poll *nfcb_poll,
- __u8 *data)
+static const __u8 *
+nci_extract_rf_params_nfcb_passive_poll(struct nci_dev *ndev,
+ struct rf_tech_specific_params_nfcb_poll *nfcb_poll,
+ const __u8 *data)
{
nfcb_poll->sensb_res_len = min_t(__u8, *data++, NFC_SENSB_RES_MAXSIZE);
@@ -148,9 +150,10 @@ static __u8 *nci_extract_rf_params_nfcb_passive_poll(struct nci_dev *ndev,
return data;
}
-static __u8 *nci_extract_rf_params_nfcf_passive_poll(struct nci_dev *ndev,
- struct rf_tech_specific_params_nfcf_poll *nfcf_poll,
- __u8 *data)
+static const __u8 *
+nci_extract_rf_params_nfcf_passive_poll(struct nci_dev *ndev,
+ struct rf_tech_specific_params_nfcf_poll *nfcf_poll,
+ const __u8 *data)
{
nfcf_poll->bit_rate = *data++;
nfcf_poll->sensf_res_len = min_t(__u8, *data++, NFC_SENSF_RES_MAXSIZE);
@@ -164,9 +167,10 @@ static __u8 *nci_extract_rf_params_nfcf_passive_poll(struct nci_dev *ndev,
return data;
}
-static __u8 *nci_extract_rf_params_nfcv_passive_poll(struct nci_dev *ndev,
- struct rf_tech_specific_params_nfcv_poll *nfcv_poll,
- __u8 *data)
+static const __u8 *
+nci_extract_rf_params_nfcv_passive_poll(struct nci_dev *ndev,
+ struct rf_tech_specific_params_nfcv_poll *nfcv_poll,
+ const __u8 *data)
{
++data;
nfcv_poll->dsfid = *data++;
@@ -175,9 +179,10 @@ static __u8 *nci_extract_rf_params_nfcv_passive_poll(struct nci_dev *ndev,
return data;
}
-static __u8 *nci_extract_rf_params_nfcf_passive_listen(struct nci_dev *ndev,
- struct rf_tech_specific_params_nfcf_listen *nfcf_listen,
- __u8 *data)
+static const __u8 *
+nci_extract_rf_params_nfcf_passive_listen(struct nci_dev *ndev,
+ struct rf_tech_specific_params_nfcf_listen *nfcf_listen,
+ const __u8 *data)
{
nfcf_listen->local_nfcid2_len = min_t(__u8, *data++,
NFC_NFCID2_MAXSIZE);
@@ -198,12 +203,12 @@ static int nci_add_new_protocol(struct nci_dev *ndev,
struct nfc_target *target,
__u8 rf_protocol,
__u8 rf_tech_and_mode,
- void *params)
+ const void *params)
{
- struct rf_tech_specific_params_nfca_poll *nfca_poll;
- struct rf_tech_specific_params_nfcb_poll *nfcb_poll;
- struct rf_tech_specific_params_nfcf_poll *nfcf_poll;
- struct rf_tech_specific_params_nfcv_poll *nfcv_poll;
+ const struct rf_tech_specific_params_nfca_poll *nfca_poll;
+ const struct rf_tech_specific_params_nfcb_poll *nfcb_poll;
+ const struct rf_tech_specific_params_nfcf_poll *nfcf_poll;
+ const struct rf_tech_specific_params_nfcv_poll *nfcv_poll;
__u32 protocol;
if (rf_protocol == NCI_RF_PROTOCOL_T1T)
@@ -274,7 +279,7 @@ static int nci_add_new_protocol(struct nci_dev *ndev,
}
static void nci_add_new_target(struct nci_dev *ndev,
- struct nci_rf_discover_ntf *ntf)
+ const struct nci_rf_discover_ntf *ntf)
{
struct nfc_target *target;
int i, rc;
@@ -319,10 +324,10 @@ void nci_clear_target_list(struct nci_dev *ndev)
}
static void nci_rf_discover_ntf_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
struct nci_rf_discover_ntf ntf;
- __u8 *data = skb->data;
+ const __u8 *data = skb->data;
bool add_target = true;
ntf.rf_discovery_id = *data++;
@@ -382,7 +387,8 @@ static void nci_rf_discover_ntf_packet(struct nci_dev *ndev,
}
static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev,
- struct nci_rf_intf_activated_ntf *ntf, __u8 *data)
+ struct nci_rf_intf_activated_ntf *ntf,
+ const __u8 *data)
{
struct activation_params_nfca_poll_iso_dep *nfca_poll;
struct activation_params_nfcb_poll_iso_dep *nfcb_poll;
@@ -418,7 +424,8 @@ static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev,
}
static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev,
- struct nci_rf_intf_activated_ntf *ntf, __u8 *data)
+ struct nci_rf_intf_activated_ntf *ntf,
+ const __u8 *data)
{
struct activation_params_poll_nfc_dep *poll;
struct activation_params_listen_nfc_dep *listen;
@@ -454,7 +461,7 @@ static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev,
}
static void nci_target_auto_activated(struct nci_dev *ndev,
- struct nci_rf_intf_activated_ntf *ntf)
+ const struct nci_rf_intf_activated_ntf *ntf)
{
struct nfc_target *target;
int rc;
@@ -477,7 +484,7 @@ static void nci_target_auto_activated(struct nci_dev *ndev,
}
static int nci_store_general_bytes_nfc_dep(struct nci_dev *ndev,
- struct nci_rf_intf_activated_ntf *ntf)
+ const struct nci_rf_intf_activated_ntf *ntf)
{
ndev->remote_gb_len = 0;
@@ -519,11 +526,11 @@ static int nci_store_general_bytes_nfc_dep(struct nci_dev *ndev,
}
static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
struct nci_conn_info *conn_info;
struct nci_rf_intf_activated_ntf ntf;
- __u8 *data = skb->data;
+ const __u8 *data = skb->data;
int err = NCI_STATUS_OK;
ntf.rf_discovery_id = *data++;
@@ -681,10 +688,10 @@ static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev,
}
static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
- struct nci_conn_info *conn_info;
- struct nci_rf_deactivate_ntf *ntf = (void *) skb->data;
+ const struct nci_conn_info *conn_info;
+ const struct nci_rf_deactivate_ntf *ntf = (void *) skb->data;
pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason);
@@ -725,10 +732,10 @@ static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev,
}
static void nci_nfcee_discover_ntf_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
u8 status = NCI_STATUS_OK;
- struct nci_nfcee_discover_ntf *nfcee_ntf =
+ const struct nci_nfcee_discover_ntf *nfcee_ntf =
(struct nci_nfcee_discover_ntf *)skb->data;
pr_debug("\n");
@@ -745,7 +752,7 @@ static void nci_nfcee_discover_ntf_packet(struct nci_dev *ndev,
}
static void nci_nfcee_action_ntf_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
pr_debug("\n");
}
diff --git a/net/nfc/nci/rsp.c b/net/nfc/nci/rsp.c
index e9605922a322..ebed2a7a0071 100644
--- a/net/nfc/nci/rsp.c
+++ b/net/nfc/nci/rsp.c
@@ -25,9 +25,10 @@
/* Handle NCI Response packets */
-static void nci_core_reset_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
+static void nci_core_reset_rsp_packet(struct nci_dev *ndev,
+ const struct sk_buff *skb)
{
- struct nci_core_reset_rsp *rsp = (void *) skb->data;
+ const struct nci_core_reset_rsp *rsp = (void *) skb->data;
pr_debug("status 0x%x\n", rsp->status);
@@ -43,10 +44,11 @@ static void nci_core_reset_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
}
}
-static u8 nci_core_init_rsp_packet_v1(struct nci_dev *ndev, struct sk_buff *skb)
+static u8 nci_core_init_rsp_packet_v1(struct nci_dev *ndev,
+ const struct sk_buff *skb)
{
- struct nci_core_init_rsp_1 *rsp_1 = (void *) skb->data;
- struct nci_core_init_rsp_2 *rsp_2;
+ const struct nci_core_init_rsp_1 *rsp_1 = (void *) skb->data;
+ const struct nci_core_init_rsp_2 *rsp_2;
pr_debug("status 0x%x\n", rsp_1->status);
@@ -81,10 +83,11 @@ static u8 nci_core_init_rsp_packet_v1(struct nci_dev *ndev, struct sk_buff *skb)
return NCI_STATUS_OK;
}
-static u8 nci_core_init_rsp_packet_v2(struct nci_dev *ndev, struct sk_buff *skb)
+static u8 nci_core_init_rsp_packet_v2(struct nci_dev *ndev,
+ const struct sk_buff *skb)
{
- struct nci_core_init_rsp_nci_ver2 *rsp = (void *)skb->data;
- u8 *supported_rf_interface = rsp->supported_rf_interfaces;
+ const struct nci_core_init_rsp_nci_ver2 *rsp = (void *)skb->data;
+ const u8 *supported_rf_interface = rsp->supported_rf_interfaces;
u8 rf_interface_idx = 0;
u8 rf_extension_cnt = 0;
@@ -118,7 +121,7 @@ static u8 nci_core_init_rsp_packet_v2(struct nci_dev *ndev, struct sk_buff *skb)
return NCI_STATUS_OK;
}
-static void nci_core_init_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
+static void nci_core_init_rsp_packet(struct nci_dev *ndev, const struct sk_buff *skb)
{
u8 status = 0;
@@ -160,9 +163,9 @@ static void nci_core_init_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
}
static void nci_core_set_config_rsp_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
- struct nci_core_set_config_rsp *rsp = (void *) skb->data;
+ const struct nci_core_set_config_rsp *rsp = (void *) skb->data;
pr_debug("status 0x%x\n", rsp->status);
@@ -170,7 +173,7 @@ static void nci_core_set_config_rsp_packet(struct nci_dev *ndev,
}
static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
__u8 status = skb->data[0];
@@ -179,7 +182,8 @@ static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
nci_req_complete(ndev, status);
}
-static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
+static void nci_rf_disc_rsp_packet(struct nci_dev *ndev,
+ const struct sk_buff *skb)
{
struct nci_conn_info *conn_info;
__u8 status = skb->data[0];
@@ -210,7 +214,7 @@ static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
}
static void nci_rf_disc_select_rsp_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
__u8 status = skb->data[0];
@@ -222,7 +226,7 @@ static void nci_rf_disc_select_rsp_packet(struct nci_dev *ndev,
}
static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
__u8 status = skb->data[0];
@@ -238,9 +242,9 @@ static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev,
}
static void nci_nfcee_discover_rsp_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
- struct nci_nfcee_discover_rsp *discover_rsp;
+ const struct nci_nfcee_discover_rsp *discover_rsp;
if (skb->len != 2) {
nci_req_complete(ndev, NCI_STATUS_NFCEE_PROTOCOL_ERROR);
@@ -255,7 +259,7 @@ static void nci_nfcee_discover_rsp_packet(struct nci_dev *ndev,
}
static void nci_nfcee_mode_set_rsp_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
__u8 status = skb->data[0];
@@ -264,11 +268,11 @@ static void nci_nfcee_mode_set_rsp_packet(struct nci_dev *ndev,
}
static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
__u8 status = skb->data[0];
struct nci_conn_info *conn_info = NULL;
- struct nci_core_conn_create_rsp *rsp;
+ const struct nci_core_conn_create_rsp *rsp;
pr_debug("status 0x%x\n", status);
@@ -319,7 +323,7 @@ static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev,
}
static void nci_core_conn_close_rsp_packet(struct nci_dev *ndev,
- struct sk_buff *skb)
+ const struct sk_buff *skb)
{
struct nci_conn_info *conn_info;
__u8 status = skb->data[0];
diff --git a/net/nfc/nci/spi.c b/net/nfc/nci/spi.c
index 7d8e10e27c20..0935527d1d12 100644
--- a/net/nfc/nci/spi.c
+++ b/net/nfc/nci/spi.c
@@ -27,7 +27,7 @@
#define CRC_INIT 0xFFFF
-static int __nci_spi_send(struct nci_spi *nspi, struct sk_buff *skb,
+static int __nci_spi_send(struct nci_spi *nspi, const struct sk_buff *skb,
int cs_change)
{
struct spi_message m;
--
2.27.0
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