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Date: Thu, 30 Apr 2020 09:50:33 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>, Johannes Berg <johannes.berg@...el.com>, Sasha Levin <sashal@...nel.org>, linux-wireless@...r.kernel.org, netdev@...r.kernel.org Subject: [PATCH AUTOSEL 5.6 69/79] mac80211: sta_info: Add lockdep condition for RCU list usage From: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com> [ Upstream commit 8ca47eb9f9e4e10e7e7fa695731a88941732c38d ] The function sta_info_get_by_idx() uses RCU list primitive. It is called with local->sta_mtx held from mac80211/cfg.c. Add lockdep expression to avoid any false positive RCU list warnings. Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com> Link: https://lore.kernel.org/r/20200409082906.27427-1-madhuparnabhowmik10@gmail.com Signed-off-by: Johannes Berg <johannes.berg@...el.com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- net/mac80211/sta_info.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index e3572be307d6c..149ed0510778d 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -231,7 +231,8 @@ struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, struct sta_info *sta; int i = 0; - list_for_each_entry_rcu(sta, &local->sta_list, list) { + list_for_each_entry_rcu(sta, &local->sta_list, list, + lockdep_is_held(&local->sta_mtx)) { if (sdata != sta->sdata) continue; if (i < idx) { -- 2.20.1
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