diff options
| author | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2015-10-22 17:46:05 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2015-11-03 10:56:13 +0100 |
| commit | 730a755017139ddedac08d82f73c3532a020d372 (patch) | |
| tree | a97a8e48fef85af57ed106e6318caaaea95ed54f /net/mac80211 | |
| parent | cec6628350802b0a652486c41b57d4e1dd37a65c (diff) | |
| download | linux-stable-730a755017139ddedac08d82f73c3532a020d372.tar.gz linux-stable-730a755017139ddedac08d82f73c3532a020d372.tar.bz2 linux-stable-730a755017139ddedac08d82f73c3532a020d372.zip | |
mac80211: fixup AIFSN instead of disabling WMM
Disabling WMM has a huge impact these days. It implies that
HT and VHT will be disabled which means that the throughput
will be drammatically reduced.
Since the AIFSN is a transmission parameter, we can play a
bit and fix it up to make it compliant with the 802.11
specification which requires it to be at least 2.
Increasing it from 1 to 2 will slightly reduce the
likelyhood to get a transmission opportunity compared to
other clients that would accept to set AIFSN=1, but at
least it will allow HT and VHT which is a huge gain.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/mlme.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 67f0387bea27..b9534c9902ac 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -1816,6 +1816,13 @@ static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, } params.aifs = pos[0] & 0x0f; + + if (params.aifs < 2) { + sdata_info(sdata, + "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", + params.aifs, aci); + params.aifs = 2; + } params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); params.cw_min = ecw2cw(pos[1] & 0x0f); params.txop = get_unaligned_le16(pos + 2); @@ -4559,17 +4566,10 @@ static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata, left = len - 8; for (; left >= 4; left -= 4, pos += 4) { - u8 aifsn = pos[0] & 0x0f; u8 ecwmin = pos[1] & 0x0f; u8 ecwmax = (pos[1] & 0xf0) >> 4; int aci = (pos[0] >> 5) & 0x03; - if (aifsn < 2) { - sdata_info(sdata, - "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n", - aifsn, aci); - return false; - } if (ecwmin > ecwmax) { sdata_info(sdata, "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n", |