staging: rtl8192u: r8192U_core.c: Cleaning up unclear and confusing code

Removes confusing and unclear code.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/r8192U_core.c

@@ -1237,12 +1237,11 @@ u8 DrvAggr_GetAggregatibleList(struct net_device *dev, struct sk_buff *skb,
 static void rtl8192_tx_isr(struct urb *tx_urb)
 {
 	struct sk_buff *skb = (struct sk_buff *)tx_urb->context;
-	struct net_device *dev = NULL;
+	struct net_device *dev = (struct net_device *)(skb->cb);
 	struct r8192_priv *priv = NULL;
 	cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
 	u8  queue_index = tcb_desc->queue_index;
 
-	memcpy(&dev, (struct net_device *)(skb->cb), sizeof(struct net_device *));
 	priv = ieee80211_priv(dev);
 
 	if (tcb_desc->queue_index != TXCMD_QUEUE) {
@@ -1448,7 +1447,7 @@ static void rtl8192_net_update(struct net_device *dev)
 	net = &priv->ieee80211->current_network;
 
 	rtl8192_config_rate(dev, &rate_config);
-	priv->basic_rate = rate_config &= 0x15f;
+	priv->basic_rate = rate_config & 0x15f;
 
 	write_nic_dword(dev, BSSIDR, ((u32 *)net->bssid)[0]);
 	write_nic_word(dev, BSSIDR+4, ((u16 *)net->bssid)[2]);