From f50d2ff8f016b79a2ff4acd5943a1eda40c545d4 Mon Sep 17 00:00:00 2001
From: Chih-Kang Chang <gary.chang@realtek.com>
Date: Mon, 16 Aug 2021 16:51:28 +0800
Subject: [PATCH] mac80211: Fix insufficient headroom issue for AMSDU
Git-commit: f50d2ff8f016b79a2ff4acd5943a1eda40c545d4
Patch-mainline: v5.15-rc1
References: git-fixes
ieee80211_amsdu_realloc_pad() fails to account for extra_tx_headroom,
the original reserved headroom might be eaten. Add the necessary
extra_tx_headroom.
Fixes: 6e0456b54545 ("mac80211: add A-MSDU tx support")
Signed-off-by: Chih-Kang Chang <gary.chang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://lore.kernel.org/r/20210816085128.10931-2-pkshih@realtek.com
[fix indentation]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
net/mac80211/tx.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 1f7571777fb1..2d1193ed3eb5 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -3242,7 +3242,9 @@ static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
return true;
- if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr)))
+ if (!ieee80211_amsdu_realloc_pad(local, skb,
+ sizeof(*amsdu_hdr) +
+ local->hw.extra_tx_headroom))
return false;
data = skb_push(skb, sizeof(*amsdu_hdr));
--
2.26.2