mac80211: clean up skb reallocation code
This cleans up the skb reallocation code to avoid problems with
skb->truesize, not resize an skb twice for a single output path
because we didn't expand it enough during the first copy and also
removes the code to further expand it during crypto operations
which will no longer be necessary.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
index 1e7f03d..c9fd129 100644
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -93,13 +93,9 @@
fc |= IEEE80211_FCTL_PROTECTED;
hdr->frame_control = cpu_to_le16(fc);
- if ((skb_headroom(skb) < WEP_IV_LEN ||
- skb_tailroom(skb) < WEP_ICV_LEN)) {
- I802_DEBUG_INC(local->tx_expand_skb_head);
- if (unlikely(pskb_expand_head(skb, WEP_IV_LEN, WEP_ICV_LEN,
- GFP_ATOMIC)))
- return NULL;
- }
+ if (WARN_ON(skb_tailroom(skb) < WEP_ICV_LEN ||
+ skb_headroom(skb) < WEP_IV_LEN))
+ return NULL;
hdrlen = ieee80211_get_hdrlen(fc);
newhdr = skb_push(skb, WEP_IV_LEN);