diff options
Diffstat (limited to 'drivers/net/wireless/ath9k/recv.c')
| -rw-r--r-- | drivers/net/wireless/ath9k/recv.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c index cb449f0b417..f2327d8e9c2 100644 --- a/drivers/net/wireless/ath9k/recv.c +++ b/drivers/net/wireless/ath9k/recv.c @@ -571,8 +571,16 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush) hdr = (struct ieee80211_hdr *)skb->data; hdrlen = ieee80211_get_hdrlen_from_skb(skb); - if (hdrlen & 3) { - padsize = hdrlen % 4; + /* The MAC header is padded to have 32-bit boundary if the + * packet payload is non-zero. The general calculation for + * padsize would take into account odd header lengths: + * padsize = (4 - hdrlen % 4) % 4; However, since only + * even-length headers are used, padding can only be 0 or 2 + * bytes and we can optimize this a bit. In addition, we must + * not try to remove padding from short control frames that do + * not have payload. */ + padsize = hdrlen & 3; + if (padsize && hdrlen >= 24) { memmove(skb->data + padsize, skb->data, hdrlen); skb_pull(skb, padsize); } |