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Commit 35f2fce9 authored by Michal Kazior's avatar Michal Kazior Committed by Johannes Berg
Browse files

mac80211: use channel context notifications 



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

Signed-off-by: default avatarMichal Kazior <michal.kazior@tieto.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent c3645eac

net/mac80211/chan.c

+19 −2
Original line number Diff line number Diff line
@@ -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)