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mac80211: Allow work items to use existing channel type.

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Narrow channel types can function within larger channel types.
So, use existing channel type for work items when possible.
This decreases hardware channel changes significantly when
using non NO_HT channel types on the operating channel.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ben Greear 2011-02-07 13:44:36 -08:00 committed by John W. Linville
parent 4f2e9d91f8
commit da2fd1f0f7
1 changed files with 50 additions and 3 deletions
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53
net/mac80211/work.c
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@ -874,6 +874,44 @@ static void ieee80211_work_rx_queued_mgmt(struct ieee80211_local *local,
kfree_skb(skb);
}
static bool ieee80211_work_ct_coexists(enum nl80211_channel_type wk_ct,
enum nl80211_channel_type oper_ct)
{
switch (wk_ct) {
case NL80211_CHAN_NO_HT:
return true;
case NL80211_CHAN_HT20:
if (oper_ct != NL80211_CHAN_NO_HT)
return true;
return false;
case NL80211_CHAN_HT40MINUS:
case NL80211_CHAN_HT40PLUS:
return (wk_ct == oper_ct);
}
WARN_ON(1); /* shouldn't get here */
return false;
}
static enum nl80211_channel_type
ieee80211_calc_ct(enum nl80211_channel_type wk_ct,
enum nl80211_channel_type oper_ct)
{
switch (wk_ct) {
case NL80211_CHAN_NO_HT:
return oper_ct;
case NL80211_CHAN_HT20:
if (oper_ct != NL80211_CHAN_NO_HT)
return oper_ct;
return wk_ct;
case NL80211_CHAN_HT40MINUS:
case NL80211_CHAN_HT40PLUS:
return wk_ct;
}
WARN_ON(1); /* shouldn't get here */
return wk_ct;
}
static void ieee80211_work_timer(unsigned long data)
{
struct ieee80211_local *local = (void *) data;
@ -927,14 +965,22 @@ static void ieee80211_work_work(struct work_struct *work)
bool on_oper_chan;
bool tmp_chan_changed = false;
bool on_oper_chan2;
enum nl80211_channel_type wk_ct;
on_oper_chan = ieee80211_cfg_on_oper_channel(local);
/* Work with existing channel type if possible. */
wk_ct = wk->chan_type;
if (wk->chan == local->hw.conf.channel)
wk_ct = ieee80211_calc_ct(wk->chan_type,
local->hw.conf.channel_type);
if (local->tmp_channel)
if ((local->tmp_channel != wk->chan) ||
(local->tmp_channel_type != wk->chan_type))
(local->tmp_channel_type != wk_ct))
tmp_chan_changed = true;
local->tmp_channel = wk->chan;
local->tmp_channel_type = wk->chan_type;
local->tmp_channel_type = wk_ct;
/*
* Leave the station vifs in awake mode if they
* happen to be on the same channel as
@ -1031,7 +1077,8 @@ static void ieee80211_work_work(struct work_struct *work)
continue;
if (wk->chan != local->tmp_channel)
continue;
if (wk->chan_type != local->tmp_channel_type)
if (ieee80211_work_ct_coexists(wk->chan_type,
local->tmp_channel_type))
continue;
remain_off_channel = true;
}