leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

cfg80211: Avoid regulatory restore when COUNTRY_IE_IGNORE is set

Browse Source 
When REGULATORY_COUNTRY_IE_IGNORE is set,  __reg_process_hint_country_ie()
ignores the country code change request from __cfg80211_connect_result()
via regulatory_hint_country_ie().

After Disconnect, similar to above, country code should not be reset to
world when country IE ignore is set. But this is violated and restore of
regulatory settings is invoked by cfg80211_disconnect_work via
regulatory_hint_disconnect().

To address this, avoid regulatory restore from regulatory_hint_disconnect()
when COUNTRY_IE_IGNORE is set.

Note: Currently, restore_regulatory_settings() takes care of clearing
beacon hints. But in the proposed change, regulatory restore is avoided.
Therefore, explicitly clear beacon hints when DISABLE_BEACON_HINTS
is not set.

Signed-off-by: Rajeev Kumar Sirasanagandla <rsirasan@codeaurora.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Rajeev Kumar Sirasanagandla 2018-07-10 18:46:13 +05:30 committed by Johannes Berg
parent 30ca1aa536
commit 7417844b63
1 changed files with 46 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
net/wireless/reg.c
View File

@ -3249,8 +3249,54 @@ static void restore_regulatory_settings(bool reset_user)
schedule_work(&reg_work);
}
static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
{
struct cfg80211_registered_device *rdev;
struct wireless_dev *wdev;
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
wdev_lock(wdev);
if (!(wdev->wiphy->regulatory_flags & flag)) {
wdev_unlock(wdev);
return false;
}
wdev_unlock(wdev);
}
}
return true;
}
void regulatory_hint_disconnect(void)
{
/* Restore of regulatory settings is not required when wiphy(s)
* ignore IE from connected access point but clearance of beacon hints
* is required when wiphy(s) supports beacon hints.
*/
if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
struct reg_beacon *reg_beacon, *btmp;
if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
return;
spin_lock_bh(&reg_pending_beacons_lock);
list_for_each_entry_safe(reg_beacon, btmp,
&reg_pending_beacons, list) {
list_del(&reg_beacon->list);
kfree(reg_beacon);
}
spin_unlock_bh(&reg_pending_beacons_lock);
list_for_each_entry_safe(reg_beacon, btmp,
&reg_beacon_list, list) {
list_del(&reg_beacon->list);
kfree(reg_beacon);
}
return;
}
pr_debug("All devices are disconnected, going to restore regulatory settings\n");
restore_regulatory_settings(false);
}