[PATCH 1/4] ath10k: make sure to not leak beacon dma mapping

[Michal Kazior]

If for some reason mac80211 wouldn't stop
beaconing gracefully and just removed interface of
a running AP/IBSS interface it was possible to
leak pending beacon DMA mapping. It's very
unlikely but better safe than sorry.

Signed-off-by: Michal Kazior <michal.kazior at tieto.com>
---
 drivers/net/wireless/ath/ath10k/mac.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 58ec5a7..5a9da3a 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -2738,6 +2738,9 @@ static void ath10k_remove_interface(struct ieee80211_hw *hw,
 
 	spin_lock_bh(&ar->data_lock);
 	if (arvif->beacon) {
+		dma_unmap_single(arvif->ar->dev,
+				 ATH10K_SKB_CB(arvif->beacon)->paddr,
+				 arvif->beacon->len, DMA_TO_DEVICE);
 		dev_kfree_skb_any(arvif->beacon);
 		arvif->beacon = NULL;
 	}
-- 
1.8.5.3