Country IEs can be disregarded based on regulatory policy by
a driver. This is only possible, of course, if the driver already
has its own regulatory domain.
Signed-off-by: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
---
include/net/wireless.h | 4 ++++
net/wireless/reg.c | 19 +++++++++++++++++--
2 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/include/net/wireless.h b/include/net/wireless.h
index 9e73aae..ea89958 100644
--- a/include/net/wireless.h
+++ b/include/net/wireless.h
@@ -181,6 +181,9 @@ struct ieee80211_supported_band {
* struct wiphy - wireless hardware description
* @idx: the wiphy index assigned to this item
* @class_dev: the class device representing /sys/class/ieee80211/<wiphy-name>
+ * @ignore_country_ies: tells us the wireless core should ignore country IEs
+ * received by itself or by other wireless drivers. This will only
+ * apply if the driver has provided a regulatory_hint()
* @fw_handles_regulatory: tells us the firmware for this device
* has its own regulatory solution and cannot identify the
* ISO / IEC 3166 alpha2 it belongs to. When this is enabled
@@ -202,6 +205,7 @@ struct wiphy {
u16 interface_modes;
bool fw_handles_regulatory;
+ bool ignore_country_ies;
/* If multiple wiphys are registered and you're handed e.g.
* a regular netdev with assigned ieee80211_ptr, you won't
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index ec8b3d9..01da946 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -782,6 +782,20 @@ static u32 map_regdom_flags(u32 rd_flags)
return channel_flags;
}
+/* Follow the driver's regulatory domain if a driver always prefers
+ * that. If no preference is specified we follow the driver's regulatory
+ * domain unless a country IE has been processed */
+static int reg_follow_driver_regd(struct wiphy *wiphy)
+{
+ if (!wiphy->regd)
+ return false;
+ if (wiphy->ignore_country_ies)
+ return true;
+ if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE)
+ return true;
+ return false;
+}
+
/**
* freq_reg_info - get regulatory information for the given frequency
* @wiphy: the wiphy for which we want to process this rule for
@@ -883,7 +897,7 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band,
*
* http://tinyurl.com/11d-clarification
*/
- if (r == -ERANGE &&
+ if (!reg_follow_driver_regd(wiphy) && r == -ERANGE &&
last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) {
#ifdef CONFIG_CFG80211_REG_DEBUG
printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz "
@@ -895,7 +909,8 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band,
/* In this case we know the country IE has at least one reg rule
* for the band so we respect its band definitions */
#ifdef CONFIG_CFG80211_REG_DEBUG
- if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
+ if (!reg_follow_driver_regd(wiphy) &&
+ last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
printk(KERN_DEBUG "cfg80211: Disabling "
"channel %d MHz on %s due to "
"Country IE\n",
--
1.6.1.rc3.51.g5832d
--
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