staging: ks7010: fix complete_handler

complete_handler() takes void * types as parameters. void * parameters are then
cast to struct types. Call sites for this function either pass in NULL
or pointers to the struct types cast to void *. This casting is
unnecessary and can be removed.

Struct tx_device_buffer (which contains a pointer member to the
complete_handler() function) has as member 'ks_wlan_priv *priv' this is
unnecessary, we always have a pointer to this struct there is no need
to store it here.

The complete_handler can be more clearly defined by using struct
pointer types instead of void * types. The code is currently
unnecessarily complex, storing and passing extraneous pointer
parameters.

Remove unnecessary parameters, unnecessary casting to/from 'void
*'. Fix all call sites involving complete_handler().
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ks7010/ks7010_sdio.c

@@ -237,8 +237,9 @@ int ks_wlan_hw_power_save(struct ks_wlan_private *priv)
 
 static int enqueue_txdev(struct ks_wlan_private *priv, unsigned char *p,
 			 unsigned long size,
-			 void (*complete_handler)(void *arg1, void *arg2),
-			 void *arg1, void *arg2)
+			 void (*complete_handler)(struct ks_wlan_private *priv,
+						  struct sk_buff *skb),
+			 struct sk_buff *skb)
 {
 	struct tx_device_buffer *sp;
 	int ret;
@@ -259,8 +260,7 @@ static int enqueue_txdev(struct ks_wlan_private *priv, unsigned char *p,
 	sp->sendp = p;
 	sp->size = size;
 	sp->complete_handler = complete_handler;
-	sp->arg1 = arg1;
-	sp->arg2 = arg2;
+	sp->skb = skb;
 	inc_txqtail(priv);
 
 	return 0;
@@ -268,7 +268,7 @@ static int enqueue_txdev(struct ks_wlan_private *priv, unsigned char *p,
 err_complete:
 	kfree(p);
 	if (complete_handler)
-		(*complete_handler) (arg1, arg2);
+		(*complete_handler)(priv, skb);
 
 	return ret;
 }
@@ -327,7 +327,7 @@ static void tx_device_task(struct ks_wlan_private *priv)
 	}
 	kfree(sp->sendp);
 	if (sp->complete_handler)	/* TX Complete */
-		(*sp->complete_handler) (sp->arg1, sp->arg2);
+		(*sp->complete_handler)(priv, sp->skb);
 	inc_txqhead(priv);
 
 	if (cnt_txqbody(priv) > 0) {
@@ -337,8 +337,9 @@ static void tx_device_task(struct ks_wlan_private *priv)
 }
 
 int ks_wlan_hw_tx(struct ks_wlan_private *priv, void *p, unsigned long size,
-		  void (*complete_handler)(void *arg1, void *arg2),
-		  void *arg1, void *arg2)
+		  void (*complete_handler)(struct ks_wlan_private *priv,
+					   struct sk_buff *skb),
+		  struct sk_buff *skb)
 {
 	int result = 0;
 	struct hostif_hdr *hdr;
@@ -356,7 +357,7 @@ int ks_wlan_hw_tx(struct ks_wlan_private *priv, void *p, unsigned long size,
 
 	DPRINTK(4, "event=%04X\n", hdr->event);
 	spin_lock(&priv->tx_dev.tx_dev_lock);
-	result = enqueue_txdev(priv, p, size, complete_handler, arg1, arg2);
+	result = enqueue_txdev(priv, p, size, complete_handler, skb);
 	spin_unlock(&priv->tx_dev.tx_dev_lock);
 
 	if (cnt_txqbody(priv) > 0) {
@@ -628,7 +629,7 @@ static void trx_device_exit(struct ks_wlan_private *priv)
 		sp = &priv->tx_dev.tx_dev_buff[priv->tx_dev.qhead];
 		kfree(sp->sendp);	/* allocated memory free */
 		if (sp->complete_handler)	/* TX Complete */
-			(*sp->complete_handler) (sp->arg1, sp->arg2);
+			(*sp->complete_handler)(priv, sp->skb);
 		inc_txqhead(priv);
 	}
 

drivers/staging/ks7010/ks7010_sdio.h

@@ -108,9 +108,9 @@ struct ks_sdio_card {
 struct tx_device_buffer {
 	unsigned char *sendp;	/* pointer of send req data */
 	unsigned int size;
-	void (*complete_handler)(void *arg1, void *arg2);
-	void *arg1;
-	void *arg2;
+	void (*complete_handler)(struct ks_wlan_private *priv,
+				 struct sk_buff *skb);
+	struct sk_buff *skb;
 };
 
 struct tx_device {

drivers/staging/ks7010/ks_hostif.c

@@ -1254,10 +1254,8 @@ int hostif_data_request(struct ks_wlan_private *priv, struct sk_buff *skb)
 	pp->header.event = cpu_to_le16((uint16_t)HIF_DATA_REQ);
 
 	/* tx request */
-	result =
-	    ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp) + skb_len),
-			  (void *)send_packet_complete, (void *)priv,
-			  (void *)skb);
+	result = ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp) + skb_len),
+			       send_packet_complete, skb);
 
 	/* MIC FAILURE REPORT check */
 	if (eth_proto == ETHER_PROTOCOL_TYPE_EAP &&
@@ -1308,7 +1306,7 @@ void hostif_mib_get_request(struct ks_wlan_private *priv,
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 }
 
 static
@@ -1343,8 +1341,7 @@ void hostif_mib_set_request(struct ks_wlan_private *priv,
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp) + size), NULL, NULL,
-		      NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp) + size), NULL, NULL);
 }
 
 static
@@ -1367,7 +1364,7 @@ void hostif_start_request(struct ks_wlan_private *priv, unsigned char mode)
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 
 	priv->aplist.size = 0;
 	priv->scan_ind_count = 0;
@@ -1413,7 +1410,7 @@ void hostif_ps_adhoc_set_request(struct ks_wlan_private *priv)
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 }
 
 static
@@ -1480,7 +1477,7 @@ void hostif_infrastructure_set_request(struct ks_wlan_private *priv)
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 }
 
 static void hostif_infrastructure_set2_request(struct ks_wlan_private *priv)
@@ -1548,7 +1545,7 @@ static void hostif_infrastructure_set2_request(struct ks_wlan_private *priv)
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 }
 
 static
@@ -1593,7 +1590,7 @@ void hostif_adhoc_set_request(struct ks_wlan_private *priv)
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 }
 
 static
@@ -1641,7 +1638,7 @@ void hostif_adhoc_set2_request(struct ks_wlan_private *priv)
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 }
 
 static
@@ -1663,7 +1660,7 @@ void hostif_stop_request(struct ks_wlan_private *priv)
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 }
 
 static
@@ -1692,7 +1689,7 @@ void hostif_phy_information_request(struct ks_wlan_private *priv)
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 }
 
 static
@@ -1719,7 +1716,7 @@ void hostif_power_mngmt_request(struct ks_wlan_private *priv,
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 }
 
 static
@@ -1742,7 +1739,7 @@ void hostif_sleep_request(struct ks_wlan_private *priv, unsigned long mode)
 
 		/* send to device request */
 		ps_confirm_wait_inc(priv);
-		ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL,
+		ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL,
 			      NULL);
 	} else if (mode == SLP_ACTIVE) {
 		atomic_set(&priv->sleepstatus.wakeup_request, 1);
@@ -1804,7 +1801,7 @@ void hostif_bss_scan_request(struct ks_wlan_private *priv,
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 
 	priv->aplist.size = 0;
 	priv->scan_ind_count = 0;
@@ -1832,7 +1829,7 @@ void hostif_mic_failure_request(struct ks_wlan_private *priv,
 
 	/* send to device request */
 	ps_confirm_wait_inc(priv);
-	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL, NULL);
+	ks_wlan_hw_tx(priv, pp, hif_align_size(sizeof(*pp)), NULL, NULL);
 }
 
 /* Device I/O Receive indicate */

drivers/staging/ks7010/ks_hostif.h

@@ -656,9 +656,10 @@ void hostif_sme_enqueue(struct ks_wlan_private *priv, uint16_t event);
 int hostif_init(struct ks_wlan_private *priv);
 void hostif_exit(struct ks_wlan_private *priv);
 int ks_wlan_hw_tx(struct ks_wlan_private *priv, void *p, unsigned long size,
-		  void (*complete_handler)(void *arg1, void *arg2),
-		  void *arg1, void *arg2);
-void send_packet_complete(void *arg1, void *arg2);
+		  void (*complete_handler)(struct ks_wlan_private *priv,
+					   struct sk_buff *skb),
+		  struct sk_buff *skb);
+void send_packet_complete(struct ks_wlan_private *priv, struct sk_buff *skb);
 
 void ks_wlan_hw_wakeup_request(struct ks_wlan_private *priv);
 int ks_wlan_hw_power_save(struct ks_wlan_private *priv);

drivers/staging/ks7010/ks_wlan_net.c

@@ -2908,11 +2908,8 @@ int ks_wlan_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	return 0;
 }
 
-void send_packet_complete(void *arg1, void *arg2)
+void send_packet_complete(struct ks_wlan_private *priv, struct sk_buff *skb)
 {
-	struct ks_wlan_private *priv = (struct ks_wlan_private *)arg1;
-	struct sk_buff *packet = (struct sk_buff *)arg2;
-
 	DPRINTK(3, "\n");
 
 	priv->nstats.tx_packets++;
@@ -2920,10 +2917,9 @@ void send_packet_complete(void *arg1, void *arg2)
 	if (netif_queue_stopped(priv->net_dev))
 		netif_wake_queue(priv->net_dev);
 
-	if (packet) {
-		priv->nstats.tx_bytes += packet->len;
-		dev_kfree_skb(packet);
-		packet = NULL;
+	if (skb) {
+		priv->nstats.tx_bytes += skb->len;
+		dev_kfree_skb(skb);
 	}
 }