b43: Pass more RX flags to mac80211

This changes the RX handler to pass more status flags to mac80211.
It also changes part of the drop policy, if bad frames were requested. (Note that
currently mac80211 will throw a WARN_ON in that case. But nothing bad will happen).

This also removes some obsolete unused timestamping code.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/b43.h

@@ -550,9 +550,6 @@ struct b43_noise_calculation {
 
 struct b43_stats {
 	u8 link_noise;
-	/* Store the last TX/RX times here for updating the leds. */
-	unsigned long last_tx;
-	unsigned long last_rx;
 };
 
 struct b43_key {

drivers/net/wireless/b43/dma.c

@@ -1425,7 +1425,6 @@ void b43_dma_handle_txstatus(struct b43_wldev *dev,
 			break;
 		slot = next_slot(ring, slot);
 	}
-	dev->stats.last_tx = jiffies;
 	if (ring->stopped) {
 		B43_WARN_ON(free_slots(ring) < TX_SLOTS_PER_FRAME);
 		ieee80211_wake_queue(dev->wl->hw, ring->queue_prio);

drivers/net/wireless/b43/xmit.c

@@ -538,8 +538,14 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
 	chanstat = le16_to_cpu(rxhdr->channel);
 	phytype = chanstat & B43_RX_CHAN_PHYTYPE;
 
-	if (macstat & B43_RX_MAC_FCSERR)
+	if (unlikely(macstat & B43_RX_MAC_FCSERR)) {
 		dev->wl->ieee_stats.dot11FCSErrorCount++;
+		status.flag |= RX_FLAG_FAILED_FCS_CRC;
+	}
+	if (unlikely(phystat0 & (B43_RX_PHYST0_PLCPHCF | B43_RX_PHYST0_PLCPFV)))
+		status.flag |= RX_FLAG_FAILED_PLCP_CRC;
+	if (phystat0 & B43_RX_PHYST0_SHORTPRMBL)
+		status.flag |= RX_FLAG_SHORTPRE;
 	if (macstat & B43_RX_MAC_DECERR) {
 		/* Decryption with the given key failed.
 		 * Drop the packet. We also won't be able to decrypt it with
@@ -606,8 +612,12 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
 						phytype == B43_PHYTYPE_A);
 	else
 		status.rate_idx = b43_plcp_get_bitrate_idx_cck(plcp);
-	if (unlikely(status.rate_idx == -1))
+	if (unlikely(status.rate_idx == -1)) {
+		/* PLCP seems to be corrupted.
+		 * Drop the frame, if we are not interested in corrupted frames. */
+		if (!(dev->wl->filter_flags & FIF_PLCPFAIL))
 			goto drop;
+	}
 	status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
 
 	/*
@@ -661,7 +671,6 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
 		goto drop;
 	}
 
-	dev->stats.last_rx = jiffies;
 	ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);
 
 	return;