rt2x00: Correctly set ACK bit in tx descriptors

Add a flag to struct txdata_entry_desc that specifies whether an ack for the
frame is to be expected. Use this flag to set the ACK bit in the tx descriptor.
Previously, the ACK bit could be set incorrectly on CTS-to-self frames, so they
caused retries and were reported to be failed in the txdone handlers.

Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/wireless/rt2x00/rt2400pci.c

@@ -1072,7 +1072,7 @@ static void rt2400pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 	rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
 			   test_bit(ENTRY_TXD_MORE_FRAG, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_ACK,
-			   !(control->flags & IEEE80211_TXCTL_NO_ACK));
+			   test_bit(ENTRY_TXD_ACK, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
 			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_RTS,

drivers/net/wireless/rt2x00/rt2500pci.c

@@ -1203,7 +1203,7 @@ static void rt2500pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 	rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
 			   test_bit(ENTRY_TXD_MORE_FRAG, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_ACK,
-			   !(control->flags & IEEE80211_TXCTL_NO_ACK));
+			   test_bit(ENTRY_TXD_ACK, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
 			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_OFDM,

drivers/net/wireless/rt2x00/rt2500usb.c

@@ -1058,7 +1058,7 @@ static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 	rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
 			   test_bit(ENTRY_TXD_MORE_FRAG, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_ACK,
-			   !(control->flags & IEEE80211_TXCTL_NO_ACK));
+			   test_bit(ENTRY_TXD_ACK, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
 			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_OFDM,

drivers/net/wireless/rt2x00/rt2x00dev.c

@@ -628,13 +628,22 @@ void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 
 	tx_rate = control->tx_rate;
 
+	/*
+	 * Check whether this frame is to be acked
+	 */
+	if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
+		__set_bit(ENTRY_TXD_ACK, &desc.flags);
+
 	/*
 	 * Check if this is a RTS/CTS frame
 	 */
 	if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
 		__set_bit(ENTRY_TXD_BURST, &desc.flags);
-		if (is_rts_frame(frame_control))
+		if (is_rts_frame(frame_control)) {
 			__set_bit(ENTRY_TXD_RTS_FRAME, &desc.flags);
+			__set_bit(ENTRY_TXD_ACK, &desc.flags);
+		} else
+			__clear_bit(ENTRY_TXD_ACK, &desc.flags);
 		if (control->rts_cts_rate)
 			tx_rate = control->rts_cts_rate;
 	}

drivers/net/wireless/rt2x00/rt2x00ring.h

@@ -52,6 +52,7 @@ struct txdata_entry_desc {
 #define ENTRY_TXD_MORE_FRAG	4
 #define ENTRY_TXD_REQ_TIMESTAMP	5
 #define ENTRY_TXD_BURST		6
+#define ENTRY_TXD_ACK		7
 
 /*
  * Queue ID. ID's 0-4 are data TX rings

drivers/net/wireless/rt2x00/rt61pci.c

@@ -1578,7 +1578,7 @@ static void rt61pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 	rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
 			   test_bit(ENTRY_TXD_MORE_FRAG, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_ACK,
-			   !(control->flags & IEEE80211_TXCTL_NO_ACK));
+			   test_bit(ENTRY_TXD_ACK, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
 			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_OFDM,

drivers/net/wireless/rt2x00/rt73usb.c

@@ -1275,7 +1275,7 @@ static void rt73usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 	rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
 			   test_bit(ENTRY_TXD_MORE_FRAG, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_ACK,
-			   !(control->flags & IEEE80211_TXCTL_NO_ACK));
+			   test_bit(ENTRY_TXD_ACK, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
 			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc->flags));
 	rt2x00_set_field32(&word, TXD_W0_OFDM,