From ed68ebcaf9688a15cbd249476334d37717d49468 Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Wed, 9 Apr 2014 15:29:30 +0200 Subject: [PATCH] mac80211: split ieee80211_new_chanctx() The function did a little too much. Split it up so the code can be easily reused in the future. Signed-off-by: Michal Kazior Signed-off-by: Johannes Berg --- net/mac80211/chan.c | 56 ++++++++++++++++++++++++++++++++++----------- 1 file changed, 43 insertions(+), 13 deletions(-) diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c index 7303eddb1895..247133fe36bc 100644 --- a/net/mac80211/chan.c +++ b/net/mac80211/chan.c @@ -351,19 +351,17 @@ static bool ieee80211_is_radar_required(struct ieee80211_local *local) } static struct ieee80211_chanctx * -ieee80211_new_chanctx(struct ieee80211_local *local, - const struct cfg80211_chan_def *chandef, - enum ieee80211_chanctx_mode mode) +ieee80211_alloc_chanctx(struct ieee80211_local *local, + const struct cfg80211_chan_def *chandef, + enum ieee80211_chanctx_mode mode) { struct ieee80211_chanctx *ctx; - u32 changed; - int err; lockdep_assert_held(&local->chanctx_mtx); ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL); if (!ctx) - return ERR_PTR(-ENOMEM); + return NULL; INIT_LIST_HEAD(&ctx->assigned_vifs); INIT_LIST_HEAD(&ctx->reserved_vifs); @@ -373,31 +371,63 @@ ieee80211_new_chanctx(struct ieee80211_local *local, ctx->mode = mode; ctx->conf.radar_enabled = ieee80211_is_radar_required(local); ieee80211_recalc_chanctx_min_def(local, ctx); + + return ctx; +} + +static int ieee80211_add_chanctx(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx) +{ + u32 changed; + int err; + + lockdep_assert_held(&local->mtx); + lockdep_assert_held(&local->chanctx_mtx); + if (!local->use_chanctx) local->hw.conf.radar_enabled = ctx->conf.radar_enabled; - /* we hold the mutex to prevent idle from changing */ - lockdep_assert_held(&local->mtx); /* turn idle off *before* setting channel -- some drivers need that */ changed = ieee80211_idle_off(local); if (changed) ieee80211_hw_config(local, changed); if (!local->use_chanctx) { - local->_oper_chandef = *chandef; + local->_oper_chandef = ctx->conf.def; ieee80211_hw_config(local, 0); } else { err = drv_add_chanctx(local, ctx); if (err) { - kfree(ctx); ieee80211_recalc_idle(local); - return ERR_PTR(err); + return err; } } - /* and keep the mutex held until the new chanctx is on the list */ - list_add_rcu(&ctx->list, &local->chanctx_list); + return 0; +} + +static struct ieee80211_chanctx * +ieee80211_new_chanctx(struct ieee80211_local *local, + const struct cfg80211_chan_def *chandef, + enum ieee80211_chanctx_mode mode) +{ + struct ieee80211_chanctx *ctx; + int err; + + lockdep_assert_held(&local->mtx); + lockdep_assert_held(&local->chanctx_mtx); + + ctx = ieee80211_alloc_chanctx(local, chandef, mode); + if (!ctx) + return ERR_PTR(-ENOMEM); + err = ieee80211_add_chanctx(local, ctx); + if (err) { + kfree(ctx); + return ERR_PTR(err); + } + + list_add_rcu(&ctx->list, &local->chanctx_list); return ctx; } -- 2.20.1