1 files changed, 0 insertions, 132 deletions
diff --git a/package/kernel/mac80211/patches/333-cfg80211-reuse-existing-page-fragments-in-A-MSDU-rx.patch b/package/kernel/mac80211/patches/333-cfg80211-reuse-existing-page-fragments-in-A-MSDU-rx.patch
deleted file mode 100644
index 6e2d0cf5b0..0000000000
--- a/package/kernel/mac80211/patches/333-cfg80211-reuse-existing-page-fragments-in-A-MSDU-rx.patch
+++ /dev/null
@@ -1,132 +0,0 @@
-From: Felix Fietkau <nbd@openwrt.org>
-Date: Mon, 8 Feb 2016 14:33:19 +0100
-Subject: [PATCH] cfg80211: reuse existing page fragments in A-MSDU rx
-
-This massively reduces data copying and thus improves rx performance
-
-Signed-off-by: Felix Fietkau <nbd@openwrt.org>
----
-
---- a/net/wireless/util.c
-+++ b/net/wireless/util.c
-@@ -644,23 +644,93 @@ int ieee80211_data_from_8023(struct sk_b
- }
- EXPORT_SYMBOL(ieee80211_data_from_8023);
- 
-+static void
-+__frame_add_frag(struct sk_buff *skb, struct page *page,
-+		 void *ptr, int len, int size)
-+{
-+	struct skb_shared_info *sh = skb_shinfo(skb);
-+	int page_offset;
-+
-+	atomic_inc(&page->_count);
-+	page_offset = ptr - page_address(page);
-+	skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size);
-+}
-+
-+static void
-+__ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame,
-+			    int offset, int len)
-+{
-+	struct skb_shared_info *sh = skb_shinfo(skb);
-+	const skb_frag_t *frag = &sh->frags[-1];
-+	struct page *frag_page;
-+	void *frag_ptr;
-+	int frag_len, frag_size;
-+	int head_size = skb->len - skb->data_len;
-+	int cur_len;
-+
-+	frag_page = virt_to_head_page(skb->head);
-+	frag_ptr = skb->data;
-+	frag_size = head_size;
-+
-+	while (offset >= frag_size) {
-+		offset -= frag_size;
-+		frag++;
-+		frag_page = skb_frag_page(frag);
-+		frag_ptr = skb_frag_address(frag);
-+		frag_size = skb_frag_size(frag);
-+	}
-+
-+	frag_ptr += offset;
-+	frag_len = frag_size - offset;
-+
-+	cur_len = min(len, frag_len);
-+
-+	__frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size);
-+	len -= cur_len;
-+
-+	while (len > 0) {
-+		frag++;
-+		frag_len = skb_frag_size(frag);
-+		cur_len = min(len, frag_len);
-+		__frame_add_frag(frame, skb_frag_page(frag),
-+				 skb_frag_address(frag), cur_len, frag_len);
-+		len -= cur_len;
-+	}
-+}
-+
- static struct sk_buff *
- __ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen,
--		       int offset, int len)
-+		       int offset, int len, bool reuse_frag)
- {
- 	struct sk_buff *frame;
-+	int cur_len = len;
- 
- 	if (skb->len - offset < len)
- 		return NULL;
- 
- 	/*
-+	 * When reusing framents, copy some data to the head to simplify
-+	 * ethernet header handling and speed up protocol header processing
-+	 * in the stack later.
-+	 */
-+	if (reuse_frag)
-+		cur_len = min_t(int, len, 32);
-+
-+	/*
- 	 * Allocate and reserve two bytes more for payload
- 	 * alignment since sizeof(struct ethhdr) is 14.
- 	 */
--	frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + len);
-+	frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len);
- 
- 	skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
--	skb_copy_bits(skb, offset, skb_put(frame, len), len);
-+	skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len);
-+
-+	len -= cur_len;
-+	if (!len)
-+		return frame;
-+
-+	offset += cur_len;
-+	__ieee80211_amsdu_copy_frag(skb, frame, offset, len);
- 
- 	return frame;
- }
-@@ -676,6 +746,7 @@ void ieee80211_amsdu_to_8023s(struct sk_
- 	u8 *payload;
- 	int offset = 0, remaining, err;
- 	struct ethhdr eth;
-+	bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb);
- 	bool reuse_skb = false;
- 	bool last = false;
- 
-@@ -703,12 +774,13 @@ void ieee80211_amsdu_to_8023s(struct sk_
- 		offset += sizeof(struct ethhdr);
- 		/* reuse skb for the last subframe */
- 		last = remaining <= subframe_len + padding;
--		if (!skb_is_nonlinear(skb) && last) {
-+		if (!skb_is_nonlinear(skb) && !reuse_frag && last) {
- 			skb_pull(skb, offset);
- 			frame = skb;
- 			reuse_skb = true;
- 		} else {
--			frame = __ieee80211_amsdu_copy(skb, hlen, offset, len);
-+			frame = __ieee80211_amsdu_copy(skb, hlen, offset, len,
-+						       reuse_frag);
- 			if (!frame)
- 				goto purge;
-