There is no need to send BSS changes to driver from beacons processed
during scanning. We are more interested in beacons from an AP with which
we are associated - these will still be used to send updates to driver as
the beacons are received without scanning.
This change·removes the requirement that bss_info_changed needs to be atomic.
The beacons received during scanning are processed from a tasklet, but if we
do not call bss_info_changed for these beacons there is no need for it to be
atomic. This function (bss_info_changed) is called either from workqueue or
ioctl in all other instances.
Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Acked-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
---
This patch applies to the latest code after mac80211 filename changes.
include/net/mac80211.h | 3 +--
net/mac80211/mlme.c | 16 +++++++++++-----
2 files changed, 12 insertions(+), 7 deletions(-)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 079e7bd..4a80d74 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1020,8 +1020,7 @@ enum ieee80211_ampdu_mlme_action {
* level driver (e.g. assoc/disassoc status, erp parameters).
* This function should not be used if no BSS has been set, unless
* for association indication. The @changed parameter indicates which
- * of the bss parameters has changed when a call is made. This callback
- * has to be atomic.
+ * of the bss parameters has changed when a call is made.
*
* @configure_filter: Configure the device's RX filter.
* See the section "Frame filtering" for more information.
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 83e8b49..e3f2cb0 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2797,6 +2797,17 @@ static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
+ if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
+ ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
+ elems.wmm_param_len);
+ }
+
+ /* Do not send changes to driver if we are scanning. This removes
+ * requirement that driver's bss_info_changed function needs to be
+ * atomic. */
+ if (local->sta_sw_scanning || local->sta_hw_scanning)
+ return;
+
if (elems.erp_info && elems.erp_info_len >= 1)
changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
else {
@@ -2816,11 +2827,6 @@ static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
&bss_info);
}
- if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
- ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
- elems.wmm_param_len);
- }
-
ieee80211_bss_info_change_notify(sdata, changed);
}
--
1.5.3.4
--
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