mac80211: backport upstream fixes

Backport most significant upstream fixes (excl. hwsim fixes)
Refreshed all patches.

Contains important fixes for CSA (Channel Switch Announcement)
and A-MSDU frames.

[slightly altered to apply cleanly]
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/387-mac80211-always-account-for-A-MSDU-header-changes.patch b/package/kernel/mac80211/patches/387-mac80211-always-account-for-A-MSDU-header-changes.patch
new file mode 100644
index 0000000000..47942116bc
--- /dev/null
+++ b/package/kernel/mac80211/patches/387-mac80211-always-account-for-A-MSDU-header-changes.patch
@@ -0,0 +1,51 @@
+From: Johannes Berg <johannes.berg@intel.com>
+Date: Thu, 30 Aug 2018 10:55:49 +0200
+Subject: [PATCH] mac80211: always account for A-MSDU header changes
+
+In the error path of changing the SKB headroom of the second
+A-MSDU subframe, we would not account for the already-changed
+length of the first frame that just got converted to be in
+A-MSDU format and thus is a bit longer now.
+
+Fix this by doing the necessary accounting.
+
+It would be possible to reorder the operations, but that would
+make the code more complex (to calculate the necessary pad),
+and the headroom expansion should not fail frequently enough
+to make that worthwhile.
+
+Fixes: 6e0456b54545 ("mac80211: add A-MSDU tx support")
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+Acked-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+---
+
+--- a/net/mac80211/tx.c
++++ b/net/mac80211/tx.c
+@@ -3232,7 +3232,7 @@ static bool ieee80211_amsdu_aggregate(st
+ 
+ 	if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) +
+ 						     2 + pad))
+-		goto out;
++		goto out_recalc;
+ 
+ 	ret = true;
+ 	data = skb_push(skb, ETH_ALEN + 2);
+@@ -3249,11 +3249,13 @@ static bool ieee80211_amsdu_aggregate(st
+ 	head->data_len += skb->len;
+ 	*frag_tail = skb;
+ 
+-	flow->backlog += head->len - orig_len;
+-	tin->backlog_bytes += head->len - orig_len;
+-
+-	fq_recalc_backlog(fq, tin, flow);
++out_recalc:
++	if (head->len != orig_len) {
++		flow->backlog += head->len - orig_len;
++		tin->backlog_bytes += head->len - orig_len;
+ 
++		fq_recalc_backlog(fq, tin, flow);
++	}
+ out:
+ 	fq->memory_usage += head->truesize - orig_truesize;
+