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mac80211: properly track HT operation_mode 

When we disassociate, we set the channel to non-HT which
obviously invalidates any ht_operation_mode setting. But
when we then associate with the next AP again, we might
still have the ht_operation_mode from the previous AP
cached and fail to configure the hardware with the new
(but unchanged) operation mode. This patch fixes it by
separately tracking whether our cache is valid.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-05-08 21:21:06 +02:00 committed by John W. Linville
parent 9ed6bcce77
commit 413ad50a5c
2 changed files with 12 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/mac80211/ieee80211_i.h
View File

@ -427,6 +427,12 @@ struct ieee80211_sub_if_data {
int drop_unencrypted; int drop_unencrypted;
/*
* keep track of whether the HT opmode (stored in
* vif.bss_info.ht_operation_mode) is valid.
*/
bool ht_opmode_valid;
/* Fragment table for host-based reassembly */ /* Fragment table for host-based reassembly */
struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX]; struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
unsigned int fragment_next; unsigned int fragment_next;

7
net/mac80211/mlme.c
View File

@ -155,9 +155,11 @@ static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
ht_opmode = le16_to_cpu(hti->operation_mode); ht_opmode = le16_to_cpu(hti->operation_mode);
/* if bss configuration changed store the new one */ /* if bss configuration changed store the new one */
if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { if (!sdata->ht_opmode_valid ||
sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
changed |= BSS_CHANGED_HT; changed |= BSS_CHANGED_HT;
sdata->vif.bss_conf.ht_operation_mode = ht_opmode; sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
sdata->ht_opmode_valid = true;
} }
return changed; return changed;
@ -1047,6 +1049,9 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
/* channel(_type) changes are handled by ieee80211_hw_config */ /* channel(_type) changes are handled by ieee80211_hw_config */
local->oper_channel_type = NL80211_CHAN_NO_HT; local->oper_channel_type = NL80211_CHAN_NO_HT;
/* on the next assoc, re-program HT parameters */
sdata->ht_opmode_valid = false;
local->power_constr_level = 0; local->power_constr_level = 0;
del_timer_sync(&local->dynamic_ps_timer); del_timer_sync(&local->dynamic_ps_timer);