Nice! Wey-Yi Guy Intel Corporation 2111 N.E. 25th Avenue M/S JF3-308 Hillsboro OR 97124-5961 USA Work Phone: 503-264-6023 (OR) Cell Phone: 503-329-8410 Email: wey-yi.w.guy@xxxxxxxxx -----Original Message----- From: Johannes Berg [mailto:johannes@xxxxxxxxxxxxxxxx] Sent: Friday, May 08, 2009 12:21 PM To: John Linville Cc: linux-wireless; Abbas, Mohamed; Guy, Wey-Yi W Subject: [PATCH] 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@xxxxxxxxxxxxxxxx> --- Requires the previous patch - "mac80211: move HT operation mode BSS info" net/mac80211/ieee80211_i.h | 6 ++++++ net/mac80211/mlme.c | 7 ++++++- 2 files changed, 12 insertions(+), 1 deletion(-) --- wireless-testing.orig/net/mac80211/ieee80211_i.h 2009-05-08 21:07:32.000000000 +0200 +++ wireless-testing/net/mac80211/ieee80211_i.h 2009-05-08 21:09:13.000000000 +0200 @@ -427,6 +427,12 @@ struct ieee80211_sub_if_data { 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 */ struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX]; unsigned int fragment_next; --- wireless-testing.orig/net/mac80211/mlme.c 2009-05-08 21:04:20.000000000 +0200 +++ wireless-testing/net/mac80211/mlme.c 2009-05-08 21:07:53.000000000 +0200 @@ -155,9 +155,11 @@ static u32 ieee80211_enable_ht(struct ie ht_opmode = le16_to_cpu(hti->operation_mode); /* 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; sdata->vif.bss_conf.ht_operation_mode = ht_opmode; + sdata->ht_opmode_valid = true; } return changed; @@ -1047,6 +1049,9 @@ static void ieee80211_set_disassoc(struc /* channel(_type) changes are handled by ieee80211_hw_config */ 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; del_timer_sync(&local->dynamic_ps_timer); -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
