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[PATCH] bcm43xx-mac80211: Provide information to allow transmission rate decreases

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In bcm43xx-mac80211, the mechanism for decreasing the transmit rate cannot
be triggered. This may be shown by walking away from the AP with a laptop.
At some distance, communications will be lost and never recovered because
the rate decreasing mechanism of rc80211_simple needs to see excessive_retries
set in the ieee80211_tx_status struct. With this patch, the transmit rate
will decrease until communications restart.

Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
---

John and Michael,

This is based on the wireless-dev tree.

Larry

 bcm43xx_dma.c |    3 +++
 1 file changed, 3 insertions(+)

Index: wireless-dev/drivers/net/wireless/bcm43xx-mac80211/bcm43xx_dma.c
===================================================================
--- wireless-dev.orig/drivers/net/wireless/bcm43xx-mac80211/bcm43xx_dma.c
+++ wireless-dev/drivers/net/wireless/bcm43xx-mac80211/bcm43xx_dma.c
@@ -1311,6 +1311,9 @@ void bcm43xx_dma_handle_txstatus(struct 
 			 */
 			if (status->acked)
 				meta->txstat.flags |= IEEE80211_TX_STATUS_ACK;
+			else
+				if (!(meta->txstat.flags & IEEE80211_TXCTL_NO_ACK))
+					meta->txstat.excessive_retries = 1;
 			meta->txstat.retry_count = status->frame_count - 1;
 			ieee80211_tx_status_irqsafe(dev->wl->hw, meta->skb, &(meta->txstat));
 			/* skb is freed by ieee80211_tx_status_irqsafe() */
-
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