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authorJohannes Berg <johannes@sipsolutions.net>2008-05-29 12:38:53 +0400
committerJohn W. Linville <linville@tuxdriver.com>2008-06-03 23:00:14 +0400
commit23c0752a25d73ccc4547700e8a57d5ae2f2edf56 (patch)
tree225631645bf52c07931adc7aeb766344b05be7eb /net/mac80211/wep.c
parentf622360bce6facb05fdce4bce5ee4beb2432222d (diff)
downloadlinux-23c0752a25d73ccc4547700e8a57d5ae2f2edf56.tar.xz
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>
Diffstat (limited to 'net/mac80211/wep.c')
-rw-r--r--net/mac80211/wep.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
index 1e7f03dd8f6b..c9fd1291b19d 100644
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -93,13 +93,9 @@ static u8 *ieee80211_wep_add_iv(struct ieee80211_local *local,
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);