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mac80211: use channel context notifications 

Channel context pointer will be accessible on
both assign and unassign events.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Michal Kazior 2012-06-26 14:37:20 +02:00 committed by Johannes Berg
parent c3645eac47
commit 35f2fce9a4
1 changed files with 19 additions and 2 deletions
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21
net/mac80211/chan.c
View File

@ -5,6 +5,7 @@
#include <linux/nl80211.h>
#include <net/cfg80211.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
static enum ieee80211_chan_mode
__ieee80211_get_channel_mode(struct ieee80211_local *local,
@ -205,6 +206,7 @@ ieee80211_new_chanctx(struct ieee80211_local *local,
enum ieee80211_chanctx_mode mode)
{
struct ieee80211_chanctx *ctx;
int err;
lockdep_assert_held(&local->chanctx_mtx);
@ -216,6 +218,12 @@ ieee80211_new_chanctx(struct ieee80211_local *local,
ctx->conf.channel_type = channel_type;
ctx->mode = mode;
err = drv_add_chanctx(local, ctx);
if (err) {
kfree(ctx);
return ERR_PTR(err);
}
list_add(&ctx->list, &local->chanctx_list);
return ctx;
@ -228,6 +236,8 @@ static void ieee80211_free_chanctx(struct ieee80211_local *local,
WARN_ON_ONCE(ctx->refcount != 0);
drv_remove_chanctx(local, ctx);
list_del(&ctx->list);
kfree_rcu(ctx, rcu_head);
}
@ -235,10 +245,15 @@ static void ieee80211_free_chanctx(struct ieee80211_local *local,
static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
struct ieee80211_chanctx *ctx)
{
struct ieee80211_local *local __maybe_unused = sdata->local;
struct ieee80211_local *local = sdata->local;
int ret;
lockdep_assert_held(&local->chanctx_mtx);
ret = drv_assign_vif_chanctx(local, sdata, ctx);
if (ret)
return ret;
rcu_assign_pointer(sdata->vif.chanctx_conf, &ctx->conf);
ctx->refcount++;
@ -248,12 +263,14 @@ static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
static void ieee80211_unassign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
struct ieee80211_chanctx *ctx)
{
struct ieee80211_local *local __maybe_unused = sdata->local;
struct ieee80211_local *local = sdata->local;
lockdep_assert_held(&local->chanctx_mtx);
ctx->refcount--;
rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
drv_unassign_vif_chanctx(local, sdata, ctx);
}
static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata)