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mac80211: clean up rate control code 

It seems exceedingly unlikely that we'll ever
support swapping rate control algorithms at
runtime, so remove the unused refcounting code.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2012-01-17 10:33:29 +01:00 committed by John W. Linville
parent 151a02f693
commit 889cbb911a
3 changed files with 7 additions and 34 deletions
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27
net/mac80211/rate.c
View File

@ -159,7 +159,6 @@ static struct rate_control_ref *rate_control_alloc(const char *name,
ref = kmalloc(sizeof(struct rate_control_ref), GFP_KERNEL);
if (!ref)
goto fail_ref;
kref_init(&ref->kref);
ref->local = local;
ref->ops = ieee80211_rate_control_ops_get(name);
if (!ref->ops)
@ -184,11 +183,8 @@ fail_ref:
return NULL;
}
static void rate_control_release(struct kref *kref)
static void rate_control_free(struct rate_control_ref *ctrl_ref)
{
struct rate_control_ref *ctrl_ref;
ctrl_ref = container_of(kref, struct rate_control_ref, kref);
ctrl_ref->ops->free(ctrl_ref->priv);
#ifdef CONFIG_MAC80211_DEBUGFS
@ -383,21 +379,10 @@ void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
BUG_ON(info->control.rates[0].idx < 0);
}
struct rate_control_ref *rate_control_get(struct rate_control_ref *ref)
{
kref_get(&ref->kref);
return ref;
}
void rate_control_put(struct rate_control_ref *ref)
{
kref_put(&ref->kref, rate_control_release);
}
int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
const char *name)
{
struct rate_control_ref *ref, *old;
struct rate_control_ref *ref;
ASSERT_RTNL();
@ -417,12 +402,8 @@ int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
return -ENOENT;
}
old = local->rate_ctrl;
WARN_ON(local->rate_ctrl);
local->rate_ctrl = ref;
if (old) {
rate_control_put(old);
sta_info_flush(local, NULL);
}
wiphy_debug(local->hw.wiphy, "Selected rate control algorithm '%s'\n",
ref->ops->name);
@ -440,6 +421,6 @@ void rate_control_deinitialize(struct ieee80211_local *local)
return;
local->rate_ctrl = NULL;
rate_control_put(ref);
rate_control_free(ref);
}

4
net/mac80211/rate.h
View File

@ -14,7 +14,6 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <linux/kref.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "sta_info.h"
@ -23,14 +22,11 @@ struct rate_control_ref {
struct ieee80211_local *local;
struct rate_control_ops *ops;
void *priv;
struct kref kref;
};
void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
struct ieee80211_tx_rate_control *txrc);
struct rate_control_ref *rate_control_get(struct rate_control_ref *ref);
void rate_control_put(struct rate_control_ref *ref);
static inline void rate_control_tx_status(struct ieee80211_local *local,
struct ieee80211_supported_band *sband,

10
net/mac80211/sta_info.c
View File

@ -208,10 +208,8 @@ struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
*/
void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
{
if (sta->rate_ctrl) {
if (sta->rate_ctrl)
rate_control_free_sta(sta);
rate_control_put(sta->rate_ctrl);
}
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
wiphy_debug(local->hw.wiphy, "Destroyed STA %pM\n", sta->sta.addr);
@ -264,13 +262,11 @@ static int sta_prepare_rate_control(struct ieee80211_local *local,
if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
return 0;
sta->rate_ctrl = rate_control_get(local->rate_ctrl);
sta->rate_ctrl = local->rate_ctrl;
sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
&sta->sta, gfp);
if (!sta->rate_ctrl_priv) {
rate_control_put(sta->rate_ctrl);
if (!sta->rate_ctrl_priv)
return -ENOMEM;
}
return 0;
}