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-rw-r--r--net/wireless/reg.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 1bc8131..8ab65f2 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -750,8 +750,26 @@ static void handle_channel(struct wiphy *wiphy,
desired_bw_khz,
&reg_rule);
- if (r)
+ if (r) {
+ /*
+ * We will disable all channels that do not match our
+ * recieved regulatory rule unless the hint is coming
+ * from a Country IE and the Country IE had no information
+ * about a band. The IEEE 802.11 spec allows for an AP
+ * to send only a subset of the regulatory rules allowed,
+ * so an AP in the US that only supports 2.4 GHz may only send
+ * a country IE with information for the 2.4 GHz band
+ * while 5 GHz is still supported.
+ */
+ if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
+ r == -ERANGE)
+ return;
+
+ REG_DBG_PRINT("cfg80211: Disabling freq %d MHz\n",
+ chan->center_freq);
+ chan->flags = IEEE80211_CHAN_DISABLED;
return;
+ }
power_rule = &reg_rule->power_rule;
freq_range = &reg_rule->freq_range;