rt2x00: Fix tx status reporting for reordered frames in rt2800pci

rt2800 hardware sometimes reorders tx frames when transmitting to
multiple BA enabled STAs concurrently.

For example a tx queue
	[ STA1 | STA2 | STA1 | STA2 ]
can result in the tx status reports
	[ STA1 | STA1 | STA2 | STA2 ]
when the hw decides to put the frames for STA1 in one AMPDU.

To mitigate this effect associate the currently processed tx status
to the first frame in the tx queue with a matching wcid.

This patch fixes several problems related to incorrect tx status
reporting. Furthermore the tx rate selection is much more stable when
communicating with multiple STAs.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.h b/drivers/net/wireless/rt2x00/rt2x00queue.h
index 5f1392c72673..3d0137193da0 100644
--- a/drivers/net/wireless/rt2x00/rt2x00queue.h
+++ b/drivers/net/wireless/rt2x00/rt2x00queue.h
@@ -359,6 +359,7 @@ enum queue_entry_flags {
 	ENTRY_DATA_PENDING,
 	ENTRY_DATA_IO_FAILED,
 	ENTRY_DATA_STATUS_PENDING,
+	ENTRY_DATA_STATUS_SET,
 };
 
 /**
@@ -372,6 +373,7 @@ enum queue_entry_flags {
  * @entry_idx: The entry index number.
  * @priv_data: Private data belonging to this queue entry. The pointer
  *	points to data specific to a particular driver and queue type.
+ * @status: Device specific status
  */
 struct queue_entry {
 	unsigned long flags;
@@ -383,6 +385,8 @@ struct queue_entry {
 
 	unsigned int entry_idx;
 
+	u32 status;
+
 	void *priv_data;
 };