diff options
| author | Shanyu Zhao <shanyu.zhao@intel.com> | 2010-04-27 11:15:12 -0700 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-04-27 16:09:23 -0400 |
| commit | a2c40249a36d0b4d76d1caf6bf806e4ae5b06e8a (patch) | |
| tree | 5184590de0d70625572e8a7385e30fe26e4d42e4 | |
| parent | a060bbfe4ee95d115e8f9705a66894ac34e2c475 (diff) | |
mac80211: fix rts threshold checkmaster-2010-04-27
Currently whenever rts thresold is set, every packet will use RTS
protection no matter its size exceeds the threshold or not. This is
due to a bug in the rts threshold check.
if (len > tx->local->hw.wiphy->rts_threshold) {
txrc.rts = rts = true;
}
Basically it is comparing an int (len) and a u32 (rts_threshold),
and the variable len is assigned as:
len = min_t(int, tx->skb->len + FCS_LEN,
tx->local->hw.wiphy->frag_threshold);
However, when frag_threshold is "-1", len is always "-1", which is
0xffffffff therefore rts is always set to true.
CC: stable@kernel.org
Signed-off-by: Shanyu Zhao <shanyu.zhao@intel.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | net/mac80211/tx.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index e2aa972d584..f3841f43249 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -593,7 +593,8 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) struct ieee80211_hdr *hdr = (void *)tx->skb->data; struct ieee80211_supported_band *sband; struct ieee80211_rate *rate; - int i, len; + int i; + u32 len; bool inval = false, rts = false, short_preamble = false; struct ieee80211_tx_rate_control txrc; u32 sta_flags; @@ -602,7 +603,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) sband = tx->local->hw.wiphy->bands[tx->channel->band]; - len = min_t(int, tx->skb->len + FCS_LEN, + len = min_t(u32, tx->skb->len + FCS_LEN, tx->local->hw.wiphy->frag_threshold); /* set up the tx rate control struct we give the RC algo */ |