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cfg80211: don't require RTNL held for regdomain reads 

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>
This commit is contained in:
Johannes Berg 2018-02-27 11:22:15 +01:00
parent 230ebaa189
commit 5bf16a11ba
1 changed files with 2 additions and 2 deletions
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4
net/wireless/reg.c
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@ -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)