Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem

11 files changed, 126 insertions, 122 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2400pci.c b/drivers/net/wireless/rt2x00/rt2400pci.c
index d49e830..4f420a9 100644
--- a/drivers/net/wireless/rt2x00/rt2400pci.c
+++ b/drivers/net/wireless/rt2x00/rt2400pci.c
@@ -1104,7 +1104,7 @@ static void rt2400pci_write_beacon(struct queue_entry *entry,
 	rt2x00_set_field32(&reg, CSR14_BEACON_GEN, 0);
 	rt2x00pci_register_write(rt2x00dev, CSR14, reg);
 
-	rt2x00queue_map_txskb(rt2x00dev, entry->skb);
+	rt2x00queue_map_txskb(entry);
 
 	/*
 	 * Write the TX descriptor for the beacon.
diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c
index 2214c32..97feb7a 100644
--- a/drivers/net/wireless/rt2x00/rt2500pci.c
+++ b/drivers/net/wireless/rt2x00/rt2500pci.c
@@ -1258,7 +1258,7 @@ static void rt2500pci_write_beacon(struct queue_entry *entry,
 	rt2x00_set_field32(&reg, CSR14_BEACON_GEN, 0);
 	rt2x00pci_register_write(rt2x00dev, CSR14, reg);
 
-	rt2x00queue_map_txskb(rt2x00dev, entry->skb);
+	rt2x00queue_map_txskb(entry);
 
 	/*
 	 * Write the TX descriptor for the beacon.
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 10aefc4..5f00e00 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -499,7 +499,7 @@ void rt2800_write_tx_data(struct queue_entry *entry,
 }
 EXPORT_SYMBOL_GPL(rt2800_write_tx_data);
 
-static int rt2800_agc_to_rssi(struct rt2x00_dev *rt2x00dev, int rxwi_w2)
+static int rt2800_agc_to_rssi(struct rt2x00_dev *rt2x00dev, u32 rxwi_w2)
 {
 	int rssi0 = rt2x00_get_field32(rxwi_w2, RXWI_W2_RSSI0);
 	int rssi1 = rt2x00_get_field32(rxwi_w2, RXWI_W2_RSSI1);
diff --git a/drivers/net/wireless/rt2x00/rt2800pci.c b/drivers/net/wireless/rt2x00/rt2800pci.c
index 85a134c..b267395 100644
--- a/drivers/net/wireless/rt2x00/rt2800pci.c
+++ b/drivers/net/wireless/rt2x00/rt2800pci.c
@@ -573,7 +573,7 @@ static void rt2800pci_kick_tx_queue(struct data_queue *queue)
 {
 	struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
 	struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX);
-	unsigned int qidx = 0;
+	unsigned int qidx;
 
 	if (queue->qid == QID_MGMT)
 		qidx = 5;
@@ -676,7 +676,7 @@ static void rt2800pci_txdone(struct rt2x00_dev *rt2x00dev)
 			break;
 		}
 
-		qid = rt2x00_get_field32(status, TX_STA_FIFO_PID_TYPE) - 1;
+		qid = rt2x00_get_field32(status, TX_STA_FIFO_PID_QUEUE);
 		if (qid >= QID_RX) {
 			/*
 			 * Unknown queue, this shouldn't happen. Just drop
diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index 75ac662..94fe589 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -338,6 +338,11 @@ struct link {
 
 	/*
 	 * Work structure for scheduling periodic watchdog monitoring.
+	 * This work must be scheduled on the kernel workqueue, while
+	 * all other work structures must be queued on the mac80211
+	 * workqueue. This guarantees that the watchdog can schedule
+	 * other work structures and wait for their completion in order
+	 * to bring the device/driver back into the desired state.
 	 */
 	struct delayed_work watchdog_work;
 };
@@ -1036,17 +1041,15 @@ static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev)
 
 /**
  * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes.
- * @rt2x00dev: Pointer to &struct rt2x00_dev.
- * @skb: The skb to map.
+ * @entry: Pointer to &struct queue_entry
  */
-void rt2x00queue_map_txskb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb);
+void rt2x00queue_map_txskb(struct queue_entry *entry);
 
 /**
  * rt2x00queue_unmap_skb - Unmap a skb from DMA.
- * @rt2x00dev: Pointer to &struct rt2x00_dev.
- * @skb: The skb to unmap.
+ * @entry: Pointer to &struct queue_entry
  */
-void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb);
+void rt2x00queue_unmap_skb(struct queue_entry *entry);
 
 /**
  * rt2x00queue_get_queue - Convert queue index to queue pointer
@@ -1093,8 +1096,7 @@ void rt2x00lib_dmadone(struct queue_entry *entry);
 void rt2x00lib_txdone(struct queue_entry *entry,
 		      struct txdone_entry_desc *txdesc);
 void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status);
-void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
-		      struct queue_entry *entry);
+void rt2x00lib_rxdone(struct queue_entry *entry);
 
 /*
  * mac80211 handlers.
diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index 6f442b0..5ba79b9 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -253,6 +253,7 @@ EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt);
 
 void rt2x00lib_dmadone(struct queue_entry *entry)
 {
+	clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
 	rt2x00queue_index_inc(entry->queue, Q_INDEX_DMA_DONE);
 }
 EXPORT_SYMBOL_GPL(rt2x00lib_dmadone);
@@ -273,7 +274,7 @@ void rt2x00lib_txdone(struct queue_entry *entry,
 	/*
 	 * Unmap the skb.
 	 */
-	rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
+	rt2x00queue_unmap_skb(entry);
 
 	/*
 	 * Remove the extra tx headroom from the skb.
@@ -432,42 +433,50 @@ static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev,
 	struct ieee80211_supported_band *sband;
 	const struct rt2x00_rate *rate;
 	unsigned int i;
-	int signal;
-	int type;
+	int signal = rxdesc->signal;
+	int type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK);
 
-	/*
-	 * For non-HT rates the MCS value needs to contain the
-	 * actually used rate modulation (CCK or OFDM).
-	 */
-	if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS)
-		signal = RATE_MCS(rxdesc->rate_mode, rxdesc->signal);
-	else
-		signal = rxdesc->signal;
-
-	type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK);
-
-	sband = &rt2x00dev->bands[rt2x00dev->curr_band];
-	for (i = 0; i < sband->n_bitrates; i++) {
-		rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
-
-		if (((type == RXDONE_SIGNAL_PLCP) &&
-		     (rate->plcp == signal)) ||
-		    ((type == RXDONE_SIGNAL_BITRATE) &&
-		      (rate->bitrate == signal)) ||
-		    ((type == RXDONE_SIGNAL_MCS) &&
-		      (rate->mcs == signal))) {
-			return i;
+	switch (rxdesc->rate_mode) {
+	case RATE_MODE_CCK:
+	case RATE_MODE_OFDM:
+		/*
+		 * For non-HT rates the MCS value needs to contain the
+		 * actually used rate modulation (CCK or OFDM).
+		 */
+		if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS)
+			signal = RATE_MCS(rxdesc->rate_mode, signal);
+
+		sband = &rt2x00dev->bands[rt2x00dev->curr_band];
+		for (i = 0; i < sband->n_bitrates; i++) {
+			rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
+			if (((type == RXDONE_SIGNAL_PLCP) &&
+			     (rate->plcp == signal)) ||
+			    ((type == RXDONE_SIGNAL_BITRATE) &&
+			      (rate->bitrate == signal)) ||
+			    ((type == RXDONE_SIGNAL_MCS) &&
+			      (rate->mcs == signal))) {
+				return i;
+			}
 		}
+		break;
+	case RATE_MODE_HT_MIX:
+	case RATE_MODE_HT_GREENFIELD:
+		if (signal >= 0 && signal <= 76)
+			return signal;
+		break;
+	default:
+		break;
 	}
 
 	WARNING(rt2x00dev, "Frame received with unrecognized signal, "
-		"signal=0x%.4x, type=%d.\n", signal, type);
+		"mode=0x%.4x, signal=0x%.4x, type=%d.\n",
+		rxdesc->rate_mode, signal, type);
 	return 0;
 }
 
-void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
-		      struct queue_entry *entry)
+void rt2x00lib_rxdone(struct queue_entry *entry)
 {
+	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 	struct rxdone_entry_desc rxdesc;
 	struct sk_buff *skb;
 	struct ieee80211_rx_status *rx_status;
@@ -481,14 +490,14 @@ void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
 	 * Allocate a new sk_buffer. If no new buffer available, drop the
 	 * received frame and reuse the existing buffer.
 	 */
-	skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry);
+	skb = rt2x00queue_alloc_rxskb(entry);
 	if (!skb)
-		return;
+		goto submit_entry;
 
 	/*
 	 * Unmap the skb.
 	 */
-	rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
+	rt2x00queue_unmap_skb(entry);
 
 	/*
 	 * Extract the RXD details.
@@ -523,18 +532,12 @@ void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
 	skb_trim(entry->skb, rxdesc.size);
 
 	/*
-	 * Check if the frame was received using HT. In that case,
-	 * the rate is the MCS index and should be passed to mac80211
-	 * directly. Otherwise we need to translate the signal to
-	 * the correct bitrate index.
+	 * Translate the signal to the correct bitrate index.
 	 */
-	if (rxdesc.rate_mode == RATE_MODE_CCK ||
-	    rxdesc.rate_mode == RATE_MODE_OFDM) {
-		rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc);
-	} else {
+	rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc);
+	if (rxdesc.rate_mode == RATE_MODE_HT_MIX ||
+	    rxdesc.rate_mode == RATE_MODE_HT_GREENFIELD)
 		rxdesc.flags |= RX_FLAG_HT;
-		rate_idx = rxdesc.signal;
-	}
 
 	/*
 	 * Update extra components
diff --git a/drivers/net/wireless/rt2x00/rt2x00lib.h b/drivers/net/wireless/rt2x00/rt2x00lib.h
index 70c85ac..619da23 100644
--- a/drivers/net/wireless/rt2x00/rt2x00lib.h
+++ b/drivers/net/wireless/rt2x00/rt2x00lib.h
@@ -100,18 +100,15 @@ void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
 
 /**
  * rt2x00queue_alloc_rxskb - allocate a skb for RX purposes.
- * @rt2x00dev: Pointer to &struct rt2x00_dev.
- * @queue: The queue for which the skb will be applicable.
+ * @entry: The entry for which the skb will be applicable.
  */
-struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev,
-					struct queue_entry *entry);
+struct sk_buff *rt2x00queue_alloc_rxskb(struct queue_entry *entry);
 
 /**
  * rt2x00queue_free_skb - free a skb
- * @rt2x00dev: Pointer to &struct rt2x00_dev.
- * @skb: The skb to free.
+ * @entry: The entry for which the skb will be applicable.
  */
-void rt2x00queue_free_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb);
+void rt2x00queue_free_skb(struct queue_entry *entry);
 
 /**
  * rt2x00queue_align_frame - Align 802.11 frame to 4-byte boundary
diff --git a/drivers/net/wireless/rt2x00/rt2x00link.c b/drivers/net/wireless/rt2x00/rt2x00link.c
index 4d534e9..b971d87 100644
--- a/drivers/net/wireless/rt2x00/rt2x00link.c
+++ b/drivers/net/wireless/rt2x00/rt2x00link.c
@@ -236,6 +236,12 @@ void rt2x00link_update_stats(struct rt2x00_dev *rt2x00dev,
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 
 	/*
+	 * No need to update the stats for !=STA interfaces
+	 */
+	if (!rt2x00dev->intf_sta_count)
+		return;
+
+	/*
 	 * Frame was received successfully since non-succesfull
 	 * frames would have been dropped by the hardware.
 	 */
@@ -411,8 +417,7 @@ void rt2x00link_start_watchdog(struct rt2x00_dev *rt2x00dev)
 	    !test_bit(DRIVER_SUPPORT_WATCHDOG, &rt2x00dev->flags))
 		return;
 
-	ieee80211_queue_delayed_work(rt2x00dev->hw,
-				     &link->watchdog_work, WATCHDOG_INTERVAL);
+	schedule_delayed_work(&link->watchdog_work, WATCHDOG_INTERVAL);
 }
 
 void rt2x00link_stop_watchdog(struct rt2x00_dev *rt2x00dev)
@@ -436,8 +441,7 @@ static void rt2x00link_watchdog(struct work_struct *work)
 	rt2x00dev->ops->lib->watchdog(rt2x00dev);
 
 	if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
-		ieee80211_queue_delayed_work(rt2x00dev->hw,
-					     &link->watchdog_work, WATCHDOG_INTERVAL);
+		schedule_delayed_work(&link->watchdog_work, WATCHDOG_INTERVAL);
 }
 
 void rt2x00link_register(struct rt2x00_dev *rt2x00dev)
diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.c b/drivers/net/wireless/rt2x00/rt2x00pci.c
index 63c2cc4..2449d78 100644
--- a/drivers/net/wireless/rt2x00/rt2x00pci.c
+++ b/drivers/net/wireless/rt2x00/rt2x00pci.c
@@ -84,7 +84,7 @@ void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
 		/*
 		 * Send the frame to rt2x00lib for further processing.
 		 */
-		rt2x00lib_rxdone(rt2x00dev, entry);
+		rt2x00lib_rxdone(entry);
 	}
 }
 EXPORT_SYMBOL_GPL(rt2x00pci_rxdone);
diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c
index eede999..e360d28 100644
--- a/drivers/net/wireless/rt2x00/rt2x00queue.c
+++ b/drivers/net/wireless/rt2x00/rt2x00queue.c
@@ -33,9 +33,9 @@
 #include "rt2x00.h"
 #include "rt2x00lib.h"
 
-struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev,
-					struct queue_entry *entry)
+struct sk_buff *rt2x00queue_alloc_rxskb(struct queue_entry *entry)
 {
+	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 	struct sk_buff *skb;
 	struct skb_frame_desc *skbdesc;
 	unsigned int frame_size;
@@ -97,41 +97,42 @@ struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev,
 	return skb;
 }
 
-void rt2x00queue_map_txskb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb)
+void rt2x00queue_map_txskb(struct queue_entry *entry)
 {
-	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
+	struct device *dev = entry->queue->rt2x00dev->dev;
+	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
 
 	skbdesc->skb_dma =
-	    dma_map_single(rt2x00dev->dev, skb->data, skb->len, DMA_TO_DEVICE);
+	    dma_map_single(dev, entry->skb->data, entry->skb->len, DMA_TO_DEVICE);
 	skbdesc->flags |= SKBDESC_DMA_MAPPED_TX;
 }
 EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb);
 
-void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb)
+void rt2x00queue_unmap_skb(struct queue_entry *entry)
 {
-	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
+	struct device *dev = entry->queue->rt2x00dev->dev;
+	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
 
 	if (skbdesc->flags & SKBDESC_DMA_MAPPED_RX) {
-		dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, skb->len,
+		dma_unmap_single(dev, skbdesc->skb_dma, entry->skb->len,
 				 DMA_FROM_DEVICE);
 		skbdesc->flags &= ~SKBDESC_DMA_MAPPED_RX;
-	}
-
-	if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) {
-		dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, skb->len,
+	} else if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) {
+		dma_unmap_single(dev, skbdesc->skb_dma, entry->skb->len,
 				 DMA_TO_DEVICE);
 		skbdesc->flags &= ~SKBDESC_DMA_MAPPED_TX;
 	}
 }
 EXPORT_SYMBOL_GPL(rt2x00queue_unmap_skb);
 
-void rt2x00queue_free_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb)
+void rt2x00queue_free_skb(struct queue_entry *entry)
 {
-	if (!skb)
+	if (!entry->skb)
 		return;
 
-	rt2x00queue_unmap_skb(rt2x00dev, skb);
-	dev_kfree_skb_any(skb);
+	rt2x00queue_unmap_skb(entry);
+	dev_kfree_skb_any(entry->skb);
+	entry->skb = NULL;
 }
 
 void rt2x00queue_align_frame(struct sk_buff *skb)
@@ -440,7 +441,7 @@ static int rt2x00queue_write_tx_data(struct queue_entry *entry,
 	 * Map the skb to DMA.
 	 */
 	if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags))
-		rt2x00queue_map_txskb(rt2x00dev, entry->skb);
+		rt2x00queue_map_txskb(entry);
 
 	return 0;
 }
@@ -491,7 +492,8 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb,
 	if (unlikely(rt2x00queue_full(queue)))
 		return -ENOBUFS;
 
-	if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) {
+	if (unlikely(test_and_set_bit(ENTRY_OWNER_DEVICE_DATA,
+				      &entry->flags))) {
 		ERROR(queue->rt2x00dev,
 		      "Arrived at non-free entry in the non-full queue %d.\n"
 		      "Please file bug report to %s.\n",
@@ -586,8 +588,7 @@ int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev,
 	/*
 	 * Clean up the beacon skb.
 	 */
-	rt2x00queue_free_skb(rt2x00dev, intf->beacon->skb);
-	intf->beacon->skb = NULL;
+	rt2x00queue_free_skb(intf->beacon);
 
 	if (!enable_beacon) {
 		rt2x00dev->ops->lib->kill_tx_queue(intf->beacon->queue);
@@ -828,8 +829,7 @@ static int rt2x00queue_alloc_entries(struct data_queue *queue,
 	return 0;
 }
 
-static void rt2x00queue_free_skbs(struct rt2x00_dev *rt2x00dev,
-				  struct data_queue *queue)
+static void rt2x00queue_free_skbs(struct data_queue *queue)
 {
 	unsigned int i;
 
@@ -837,19 +837,17 @@ static void rt2x00queue_free_skbs(struct rt2x00_dev *rt2x00dev,
 		return;
 
 	for (i = 0; i < queue->limit; i++) {
-		if (queue->entries[i].skb)
-			rt2x00queue_free_skb(rt2x00dev, queue->entries[i].skb);
+		rt2x00queue_free_skb(&queue->entries[i]);
 	}
 }
 
-static int rt2x00queue_alloc_rxskbs(struct rt2x00_dev *rt2x00dev,
-				    struct data_queue *queue)
+static int rt2x00queue_alloc_rxskbs(struct data_queue *queue)
 {
 	unsigned int i;
 	struct sk_buff *skb;
 
 	for (i = 0; i < queue->limit; i++) {
-		skb = rt2x00queue_alloc_rxskb(rt2x00dev, &queue->entries[i]);
+		skb = rt2x00queue_alloc_rxskb(&queue->entries[i]);
 		if (!skb)
 			return -ENOMEM;
 		queue->entries[i].skb = skb;
@@ -884,7 +882,7 @@ int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev)
 			goto exit;
 	}
 
-	status = rt2x00queue_alloc_rxskbs(rt2x00dev, rt2x00dev->rx);
+	status = rt2x00queue_alloc_rxskbs(rt2x00dev->rx);
 	if (status)
 		goto exit;
 
@@ -902,7 +900,7 @@ void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev)
 {
 	struct data_queue *queue;
 
-	rt2x00queue_free_skbs(rt2x00dev, rt2x00dev->rx);
+	rt2x00queue_free_skbs(rt2x00dev->rx);
 
 	queue_for_each(rt2x00dev, queue) {
 		kfree(queue->entries);
diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index 4c5ae3d..b3317df 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -208,7 +208,7 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb)
 	struct queue_entry *entry = (struct queue_entry *)urb->context;
 	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 
-	if (!__test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
+	if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
 		return;
 
 	/*
@@ -220,7 +220,7 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb)
 	 * Check if the frame was correctly uploaded
 	 */
 	if (urb->status)
-		__set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
+		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
 
 	/*
 	 * Schedule the delayed work for reading the TX status
@@ -253,7 +253,10 @@ static void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
 			  entry->skb->data, length,
 			  rt2x00usb_interrupt_txdone, entry);
 
-	usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
+	if (usb_submit_urb(entry_priv->urb, GFP_ATOMIC)) {
+		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
+		rt2x00lib_dmadone(entry);
+	}
 }
 
 void rt2x00usb_kick_tx_queue(struct data_queue *queue)
@@ -280,14 +283,6 @@ static void rt2x00usb_kill_tx_entry(struct queue_entry *entry)
 	if ((entry->queue->qid == QID_BEACON) &&
 	    (test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)))
 		usb_kill_urb(bcn_priv->guardian_urb);
-
-	/*
-	 * We need a short delay here to wait for
-	 * the URB to be canceled
-	 */
-	do {
-		udelay(100);
-	} while (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags));
 }
 
 void rt2x00usb_kill_tx_queue(struct data_queue *queue)
@@ -363,10 +358,12 @@ void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev)
 	struct data_queue *queue;
 
 	tx_queue_for_each(rt2x00dev, queue) {
-		if (rt2x00queue_dma_timeout(queue))
-			rt2x00usb_watchdog_tx_dma(queue);
-		if (rt2x00queue_timeout(queue))
-			rt2x00usb_watchdog_tx_status(queue);
+		if (!rt2x00queue_empty(queue)) {
+			if (rt2x00queue_dma_timeout(queue))
+				rt2x00usb_watchdog_tx_dma(queue);
+			if (rt2x00queue_timeout(queue))
+				rt2x00usb_watchdog_tx_status(queue);
+		}
 	}
 }
 EXPORT_SYMBOL_GPL(rt2x00usb_watchdog);
@@ -398,7 +395,7 @@ static void rt2x00usb_work_rxdone(struct work_struct *work)
 		/*
 		 * Send the frame to rt2x00lib for further processing.
 		 */
-		rt2x00lib_rxdone(rt2x00dev, entry);
+		rt2x00lib_rxdone(entry);
 	}
 }
 
@@ -407,7 +404,7 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb)
 	struct queue_entry *entry = (struct queue_entry *)urb->context;
 	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 
-	if (!__test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
+	if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
 		return;
 
 	/*
@@ -421,7 +418,7 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb)
 	 * a problem.
 	 */
 	if (urb->actual_length < entry->queue->desc_size || urb->status)
-		__set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
+		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
 
 	/*
 	 * Schedule the delayed work for reading the RX status
@@ -467,7 +464,10 @@ void rt2x00usb_clear_entry(struct queue_entry *entry)
 				rt2x00usb_interrupt_rxdone, entry);
 
 		set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
-		usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
+		if (usb_submit_urb(entry_priv->urb, GFP_ATOMIC)) {
+			set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
+			rt2x00lib_dmadone(entry);
+		}
 	}
 }
 EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);
@@ -542,9 +542,9 @@ static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev)
 	return 0;
 }
 
-static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev,
-			       struct data_queue *queue)
+static int rt2x00usb_alloc_entries(struct data_queue *queue)
 {
+	struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
 	struct queue_entry_priv_usb *entry_priv;
 	struct queue_entry_priv_usb_bcn *bcn_priv;
 	unsigned int i;
@@ -561,7 +561,7 @@ static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev,
 	 * no guardian byte was required for the beacon,
 	 * then we are done.
 	 */
-	if (rt2x00dev->bcn != queue ||
+	if (queue->qid != QID_BEACON ||
 	    !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
 		return 0;
 
@@ -575,9 +575,9 @@ static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev,
 	return 0;
 }
 
-static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev,
-			       struct data_queue *queue)
+static void rt2x00usb_free_entries(struct data_queue *queue)
 {
+	struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
 	struct queue_entry_priv_usb *entry_priv;
 	struct queue_entry_priv_usb_bcn *bcn_priv;
 	unsigned int i;
@@ -596,7 +596,7 @@ static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev,
 	 * no guardian byte was required for the beacon,
 	 * then we are done.
 	 */
-	if (rt2x00dev->bcn != queue ||
+	if (queue->qid != QID_BEACON ||
 	    !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
 		return;
 
@@ -623,7 +623,7 @@ int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
 	 * Allocate DMA
 	 */
 	queue_for_each(rt2x00dev, queue) {
-		status = rt2x00usb_alloc_urb(rt2x00dev, queue);
+		status = rt2x00usb_alloc_entries(queue);
 		if (status)
 			goto exit;
 	}
@@ -642,7 +642,7 @@ void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
 	struct data_queue *queue;
 
 	queue_for_each(rt2x00dev, queue)
-		rt2x00usb_free_urb(rt2x00dev, queue);
+		rt2x00usb_free_entries(queue);
 }
 EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize);