[BLUETOOTH]: Introduce skb->data accessor methods for hci_{acl,event,sco}_hdr

For consistency with other skb data accessors, reducing the number of direct
accesses to skb->data.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

5 files changed, 30 insertions, 12 deletions

diff --git a/drivers/bluetooth/bluecard_cs.c b/drivers/bluetooth/bluecard_cs.c
index acfb6a430dcc..851de4d5b7de 100644
--- a/drivers/bluetooth/bluecard_cs.c
+++ b/drivers/bluetooth/bluecard_cs.c
@@ -461,20 +461,20 @@ static void bluecard_receive(bluecard_info_t *info, unsigned int offset)
                                 switch (info->rx_state) {
 
                                 case RECV_WAIT_EVENT_HEADER:
-                                        eh = (struct hci_event_hdr *)(info->rx_skb->data);
+                                        eh = hci_event_hdr(info->rx_skb);
                                         info->rx_state = RECV_WAIT_DATA;
                                         info->rx_count = eh->plen;
                                         break;
 
                                 case RECV_WAIT_ACL_HEADER:
-                                        ah = (struct hci_acl_hdr *)(info->rx_skb->data);
+                                        ah = hci_acl_hdr(info->rx_skb);
                                         dlen = __le16_to_cpu(ah->dlen);
                                         info->rx_state = RECV_WAIT_DATA;
                                         info->rx_count = dlen;
                                         break;
 
                                 case RECV_WAIT_SCO_HEADER:
-                                        sh = (struct hci_sco_hdr *)(info->rx_skb->data);
+                                        sh = hci_sco_hdr(info->rx_skb);
                                         info->rx_state = RECV_WAIT_DATA;
                                         info->rx_count = sh->dlen;
                                         break;
diff --git a/drivers/bluetooth/bt3c_cs.c b/drivers/bluetooth/bt3c_cs.c
index 18b0f3992c5b..39516074636b 100644
--- a/drivers/bluetooth/bt3c_cs.c
+++ b/drivers/bluetooth/bt3c_cs.c
@@ -303,20 +303,20 @@ static void bt3c_receive(bt3c_info_t *info)
                                 switch (info->rx_state) {
 
                                 case RECV_WAIT_EVENT_HEADER:
-                                        eh = (struct hci_event_hdr *)(info->rx_skb->data);
+                                        eh = hci_event_hdr(info->rx_skb);
                                         info->rx_state = RECV_WAIT_DATA;
                                         info->rx_count = eh->plen;
                                         break;
 
                                 case RECV_WAIT_ACL_HEADER:
-                                        ah = (struct hci_acl_hdr *)(info->rx_skb->data);
+                                        ah = hci_acl_hdr(info->rx_skb);
                                         dlen = __le16_to_cpu(ah->dlen);
                                         info->rx_state = RECV_WAIT_DATA;
                                         info->rx_count = dlen;
                                         break;
 
                                 case RECV_WAIT_SCO_HEADER:
-                                        sh = (struct hci_sco_hdr *)(info->rx_skb->data);
+                                        sh = hci_sco_hdr(info->rx_skb);
                                         info->rx_state = RECV_WAIT_DATA;
                                         info->rx_count = sh->dlen;
                                         break;
diff --git a/drivers/bluetooth/btuart_cs.c b/drivers/bluetooth/btuart_cs.c
index c1bce75148fe..d7d2ea0d86a1 100644
--- a/drivers/bluetooth/btuart_cs.c
+++ b/drivers/bluetooth/btuart_cs.c
@@ -250,20 +250,20 @@ static void btuart_receive(btuart_info_t *info)
                                 switch (info->rx_state) {
 
                                 case RECV_WAIT_EVENT_HEADER:
-                                        eh = (struct hci_event_hdr *)(info->rx_skb->data);
+                                        eh = hci_event_hdr(info->rx_skb);
                                         info->rx_state = RECV_WAIT_DATA;
                                         info->rx_count = eh->plen;
                                         break;
 
                                 case RECV_WAIT_ACL_HEADER:
-                                        ah = (struct hci_acl_hdr *)(info->rx_skb->data);
+                                        ah = hci_acl_hdr(info->rx_skb);
                                         dlen = __le16_to_cpu(ah->dlen);
                                         info->rx_state = RECV_WAIT_DATA;
                                         info->rx_count = dlen;
                                         break;
 
                                 case RECV_WAIT_SCO_HEADER:
-                                        sh = (struct hci_sco_hdr *)(info->rx_skb->data);
+                                        sh = hci_sco_hdr(info->rx_skb);
                                         info->rx_state = RECV_WAIT_DATA;
                                         info->rx_count = sh->dlen;
                                         break;
diff --git a/drivers/bluetooth/hci_h4.c b/drivers/bluetooth/hci_h4.c
index 34f0afc42407..bfbae14cf93d 100644
--- a/drivers/bluetooth/hci_h4.c
+++ b/drivers/bluetooth/hci_h4.c
@@ -188,7 +188,7 @@ static int h4_recv(struct hci_uart *hu, void *data, int count)
                                 continue;
 
                         case H4_W4_EVENT_HDR:
-                                eh = (struct hci_event_hdr *) h4->rx_skb->data;
+                                eh = hci_event_hdr(h4->rx_skb);
 
                                 BT_DBG("Event header: evt 0x%2.2x plen %d", eh->evt, eh->plen);
 
@@ -196,7 +196,7 @@ static int h4_recv(struct hci_uart *hu, void *data, int count)
                                 continue;
 
                         case H4_W4_ACL_HDR:
-                                ah = (struct hci_acl_hdr *) h4->rx_skb->data;
+                                ah = hci_acl_hdr(h4->rx_skb);
                                 dlen = __le16_to_cpu(ah->dlen);
 
                                 BT_DBG("ACL header: dlen %d", dlen);
@@ -205,7 +205,7 @@ static int h4_recv(struct hci_uart *hu, void *data, int count)
                                 continue;
 
                         case H4_W4_SCO_HDR:
-                                sh = (struct hci_sco_hdr *) h4->rx_skb->data;
+                                sh = hci_sco_hdr(h4->rx_skb);
 
                                 BT_DBG("SCO header: dlen %d", sh->dlen);
 
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 41456c148842..93ce272a5d27 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -709,6 +709,24 @@ struct hci_sco_hdr {
         __u8    dlen;
 } __attribute__ ((packed));
 
+#ifdef __KERNEL__
+#include <linux/skbuff.h>
+static inline struct hci_event_hdr *hci_event_hdr(const struct sk_buff *skb)
+{
+        return (struct hci_event_hdr *)skb->data;
+}
+
+static inline struct hci_acl_hdr *hci_acl_hdr(const struct sk_buff *skb)
+{
+        return (struct hci_acl_hdr *)skb->data;
+}
+
+static inline struct hci_sco_hdr *hci_sco_hdr(const struct sk_buff *skb)
+{
+        return (struct hci_sco_hdr *)skb->data;
+}
+#endif
+
 /* Command opcode pack/unpack */
 #define hci_opcode_pack(ogf, ocf)       (__u16) ((ocf & 0x03ff)|(ogf << 10))
 #define hci_opcode_ogf(op)              (op >> 10)