Patch "ath9k: declare required extra tx headroom" has been added to the 4.1-stable tree

Patch "ath9k: declare required extra tx headroom" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ath9k: declare required extra tx headroom

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ath9k-declare-required-extra-tx-headroom.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 029cd0370241641eb70235d205aa0b90c84dce44 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Thu, 24 Sep 2015 16:59:46 +0200
Subject: ath9k: declare required extra tx headroom

From: Felix Fietkau <nbd@openwrt.org>

commit 029cd0370241641eb70235d205aa0b90c84dce44 upstream.

ath9k inserts padding between the 802.11 header and the data area (to
align it). Since it didn't declare this extra required headroom, this
led to some nasty issues like randomly dropped packets in some setups.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/wireless/ath/ath9k/init.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -874,6 +874,7 @@ static void ath9k_set_hw_capab(struct at
 	hw->max_rate_tries = 10;
 	hw->sta_data_size = sizeof(struct ath_node);
 	hw->vif_data_size = sizeof(struct ath_vif);
+	hw->extra_tx_headroom = 4;
 
 	hw->wiphy->available_antennas_rx = BIT(ah->caps.max_rxchains) - 1;
 	hw->wiphy->available_antennas_tx = BIT(ah->caps.max_txchains) - 1;


Patches currently in stable-queue which might be from nbd@openwrt.org are

queue-4.1/ath9k-declare-required-extra-tx-headroom.patch