brcm80211: use container_of to resolve dma_info from dma_pub

Use container_of instead of casting first structure member.

Compiled but untested.
Signed-off-by: NFabian Frederick <fabf@skynet.be>
Acked-by: NArend van Spriel <arend@broadcom.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmsmac/dma.c

@@ -746,7 +746,7 @@ dma64_dd_upd(struct dma_info *di, struct dma64desc *ddring,
 /* !! may be called with core in reset */
 void dma_detach(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 
 	brcms_dbg_dma(di->core, "%s:\n", di->name);
 
@@ -842,7 +842,7 @@ static void _dma_rxenable(struct dma_info *di)
 
 void dma_rxinit(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 
 	brcms_dbg_dma(di->core, "%s:\n", di->name);
 
@@ -924,7 +924,7 @@ static struct sk_buff *_dma_getnextrxp(struct dma_info *di, bool forceall)
  */
 int dma_rx(struct dma_pub *pub, struct sk_buff_head *skb_list)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	struct sk_buff_head dma_frames;
 	struct sk_buff *p, *next;
 	uint len;
@@ -1022,7 +1022,7 @@ static bool dma64_txidle(struct dma_info *di)
  */
 bool dma_rxfill(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	struct sk_buff *p;
 	u16 rxin, rxout;
 	u32 flags = 0;
@@ -1106,7 +1106,7 @@ bool dma_rxfill(struct dma_pub *pub)
 
 void dma_rxreclaim(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	struct sk_buff *p;
 
 	brcms_dbg_dma(di->core, "%s:\n", di->name);
@@ -1126,7 +1126,7 @@ void dma_counterreset(struct dma_pub *pub)
 /* get the address of the var in order to change later */
 unsigned long dma_getvar(struct dma_pub *pub, const char *name)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 
 	if (!strcmp(name, "&txavail"))
 		return (unsigned long)&(di->dma.txavail);
@@ -1137,7 +1137,7 @@ unsigned long dma_getvar(struct dma_pub *pub, const char *name)
 
 void dma_txinit(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	u32 control = D64_XC_XE;
 
 	brcms_dbg_dma(di->core, "%s:\n", di->name);
@@ -1170,7 +1170,7 @@ void dma_txinit(struct dma_pub *pub)
 
 void dma_txsuspend(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 
 	brcms_dbg_dma(di->core, "%s:\n", di->name);
 
@@ -1182,7 +1182,7 @@ void dma_txsuspend(struct dma_pub *pub)
 
 void dma_txresume(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 
 	brcms_dbg_dma(di->core, "%s:\n", di->name);
 
@@ -1194,7 +1194,7 @@ void dma_txresume(struct dma_pub *pub)
 
 bool dma_txsuspended(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 
 	return (di->ntxd == 0) ||
 	       ((bcma_read32(di->core,
@@ -1204,7 +1204,7 @@ bool dma_txsuspended(struct dma_pub *pub)
 
 void dma_txreclaim(struct dma_pub *pub, enum txd_range range)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	struct sk_buff *p;
 
 	brcms_dbg_dma(di->core, "%s: %s\n",
@@ -1225,7 +1225,7 @@ void dma_txreclaim(struct dma_pub *pub, enum txd_range range)
 
 bool dma_txreset(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	u32 status;
 
 	if (di->ntxd == 0)
@@ -1252,7 +1252,7 @@ bool dma_txreset(struct dma_pub *pub)
 
 bool dma_rxreset(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	u32 status;
 
 	if (di->nrxd == 0)
@@ -1377,7 +1377,7 @@ static void dma_update_txavail(struct dma_info *di)
 int dma_txfast(struct brcms_c_info *wlc, struct dma_pub *pub,
 	       struct sk_buff *p)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	struct brcms_ampdu_session *session = &di->ampdu_session;
 	struct ieee80211_tx_info *tx_info;
 	bool is_ampdu;
@@ -1427,7 +1427,7 @@ int dma_txfast(struct brcms_c_info *wlc, struct dma_pub *pub,
 
 void dma_txflush(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	struct brcms_ampdu_session *session = &di->ampdu_session;
 
 	if (!skb_queue_empty(&session->skb_list))
@@ -1436,7 +1436,7 @@ void dma_txflush(struct dma_pub *pub)
 
 int dma_txpending(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	return ntxdactive(di, di->txin, di->txout);
 }
 
@@ -1446,7 +1446,7 @@ int dma_txpending(struct dma_pub *pub)
  */
 void dma_kick_tx(struct dma_pub *pub)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	struct brcms_ampdu_session *session = &di->ampdu_session;
 
 	if (!skb_queue_empty(&session->skb_list) && dma64_txidle(di))
@@ -1465,7 +1465,7 @@ void dma_kick_tx(struct dma_pub *pub)
  */
 struct sk_buff *dma_getnexttxp(struct dma_pub *pub, enum txd_range range)
 {
-	struct dma_info *di = (struct dma_info *)pub;
+	struct dma_info *di = container_of(pub, struct dma_info, dma);
 	u16 start, end, i;
 	u16 active_desc;
 	struct sk_buff *txp;
@@ -1547,7 +1547,7 @@ struct sk_buff *dma_getnexttxp(struct dma_pub *pub, enum txd_range range)
 void dma_walk_packets(struct dma_pub *dmah, void (*callback_fnc)
 		      (void *pkt, void *arg_a), void *arg_a)
 {
-	struct dma_info *di = (struct dma_info *) dmah;
+	struct dma_info *di = container_of(dmah, struct dma_info, dma);
 	uint i =   di->txin;
 	uint end = di->txout;
 	struct sk_buff *skb;