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wireless: Protect regdomain change by mutex 

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
hifive-unleashed-5.1
Dmitry Shmidt 2011-12-19 12:32:21 -08:00 committed by John W. Linville
parent b423db5b35
commit cee0bec58a
1 changed files with 4 additions and 1 deletions
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5
net/wireless/reg.c
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@ -1830,6 +1830,7 @@ static void restore_custom_reg_settings(struct wiphy *wiphy)
static void restore_regulatory_settings(bool reset_user)
{
char alpha2[2];
char world_alpha2[2];
struct reg_beacon *reg_beacon, *btmp;
struct regulatory_request *reg_request, *tmp;
LIST_HEAD(tmp_reg_req_list);
@ -1881,6 +1882,8 @@ static void restore_regulatory_settings(bool reset_user)
/* First restore to the basic regulatory settings */
cfg80211_regdomain = cfg80211_world_regdom;
world_alpha2[0] = cfg80211_regdomain->alpha2[0];
world_alpha2[1] = cfg80211_regdomain->alpha2[1];
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY)
@ -1890,7 +1893,7 @@ static void restore_regulatory_settings(bool reset_user)
mutex_unlock(&reg_mutex);
mutex_unlock(&cfg80211_mutex);
regulatory_hint_core(cfg80211_regdomain->alpha2);
regulatory_hint_core(world_alpha2);
/*
* This restores the ieee80211_regdom module parameter