From 08ca944eb240b2299e743c76b43fbc7c2dd251de Mon Sep 17 00:00:00 2001 From: Helmut Schaa Date: Tue, 30 Nov 2010 12:19:34 +0100 Subject: [PATCH] mac80211: Minor optimization in ieee80211_rx_h_data Remove a superfluous ieee80211_is_data check as that was checked a few lines before already and we wont't get here for non-data frames at all. Second, the frame was already converted to 802.3 header format and reading the fc and addr1 fields was only possible because the 802.3 header is short enough and didn't overwrite the relevant parts of the 802.11 header. Make the code more obvious by checking the ethernet header's h_dest field. Furthermore reorder the conditions to reduce the number of checks when dynamic powersave is not needed (AP mode for example). Signed-off-by: Helmut Schaa Reviewed-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/rx.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index fdeabb1..d83334b 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -1877,9 +1877,8 @@ ieee80211_rx_h_data(struct ieee80211_rx_data *rx) dev->stats.rx_packets++; dev->stats.rx_bytes += rx->skb->len; - if (ieee80211_is_data(hdr->frame_control) && - !is_multicast_ether_addr(hdr->addr1) && - local->hw.conf.dynamic_ps_timeout > 0 && local->ps_sdata) { + if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && + !is_multicast_ether_addr(((struct ethhdr *)rx->skb->data)->h_dest)) { mod_timer(&local->dynamic_ps_timer, jiffies + msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); } -- 2.7.4