cfg80211: don't require RTNL held for regdomain reads (5bf16a11) · Commits · 戴 / test

The whole code is set up to allow RCU reads of this data, but then uses rtnl_dereference() which requires the RTNL. Convert it to rcu_dereference_rtnl() which makes it require only RCU or the RTNL, to allow RCU-protected reading of the data. Reviewed-by:

Coelho, Luciano <luciano.coelho@intel.com> Signed-off-by:

Johannes Berg <johannes.berg@intel.com>

net/wireless/reg.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -135,12 +135,12 @@ static void restore_regulatory_settings(bool reset_user);

		static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
		{
		return rtnl_dereference(cfg80211_regdomain);
		return rcu_dereference_rtnl(cfg80211_regdomain);
		}

		const struct ieee80211_regdomain get_wiphy_regdom(struct wiphy wiphy)
		{
		return rtnl_dereference(wiphy->regd);
		return rcu_dereference_rtnl(wiphy->regd);
		}

		static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)

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