summaryrefslogtreecommitdiff
path: root/net/mac80211/rx.c
diff options
context:
space:
mode:
authorPaul Stewart <pstew@chromium.org>2012-03-13 07:46:18 -0700
committerJohn W. Linville <linville@tuxdriver.com>2012-03-13 14:55:53 -0400
commit3117bbdb7899d43927c8ce4fe885ab7c1231c121 (patch)
treed2fc142e77a9d90d9054f45e666457c901bd8975 /net/mac80211/rx.c
parente9ac0745c734d39cb55ce45f1fb03a85c972b35a (diff)
mac80211: Don't let regulatory make us deaf
When regulatory information changes our HT behavior (e.g, when we get a country code from the AP we have just associated with), we should use this information to change the power with which we transmit, and what channels we transmit. Sometimes the channel parameters we derive from regulatory information contradicts the parameters we used in association. For example, we could have associated specifying HT40, but the regulatory rules we apply may forbid HT40 operation. In the situation above, we should reconfigure ourselves to transmit in HT20 only, however it makes no sense for us to disable receive in HT40, since if we associated with these parameters, the AP has every reason to expect we can and will receive packets this way. The code in mac80211 does not have the capability of sending the appropriate action frames to signal a change in HT behaviour so the AP has no clue we can no longer receive frames encoded this way. In some broken AP implementations, this can leave us effectively deaf if the AP never retries in lower HT rates. This change breaks up the channel_type parameter in the ieee80211_enable_ht function into a separate receive and transmit part. It honors the channel flags set by regulatory in order to configure the rate control algorithm, but uses the capability flags to configure the channel on the radio, since these were used in association to set the AP's transmit rate. Signed-off-by: Paul Stewart <pstew@chromium.org> Cc: Sam Leffler <sleffler@chromium.org> Cc: Johannes Berg <johannes@sipsolutions.net> Reviewed-by: Luis R Rodriguez <mcgrof@frijolero.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/rx.c')
-rw-r--r--net/mac80211/rx.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 53c88d145472..bcfe8c77c839 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2269,9 +2269,11 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
sband = rx->local->hw.wiphy->bands[status->band];
- rate_control_rate_update(local, sband, rx->sta,
- IEEE80211_RC_SMPS_CHANGED,
- local->_oper_channel_type);
+ rate_control_rate_update(
+ local, sband, rx->sta,
+ IEEE80211_RC_SMPS_CHANGED,
+ ieee80211_get_tx_channel_type(
+ local, local->_oper_channel_type));
goto handled;
}
default: