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authorSriram R <srirrama@codeaurora.org>2018-10-19 14:42:59 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-12-01 09:14:12 +0100
commit6cfe9bdfd794e8f91d48e422bfbfad921303b034 (patch)
treedb1ddc971cac0d0d0c6fdbbba964b5ddcb9ac2c2 /net/wireless/sme.c
parent6aa04c8e8bbcc8aafd4d5fdbdef646eb871d5cde (diff)
cfg80211: Prevent regulatory restore during STA disconnect in concurrent interfaces
[ Upstream commit 113f3aaa81bd56aba02659786ed65cbd9cb9a6fc ] Currently when an AP and STA interfaces are active in the same or different radios, regulatory settings are restored whenever the STA disconnects. This restores all channel information including dfs states in all radios. For example, if an AP interface is active in one radio and STA in another, when radar is detected on the AP interface, the dfs state of the channel will be changed to UNAVAILABLE. But when the STA interface disconnects, this issues a regulatory disconnect hint which restores all regulatory settings in all the radios attached and thereby losing the stored dfs state on the other radio where the channel was marked as unavailable earlier. Hence prevent such regulatory restore whenever another active beaconing interface is present in the same or other radios. Signed-off-by: Sriram R <srirrama@codeaurora.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/wireless/sme.c')
-rw-r--r--net/wireless/sme.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index d014aea07160..66cccd16c24a 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -642,11 +642,15 @@ static bool cfg80211_is_all_idle(void)
* All devices must be idle as otherwise if you are actively
* scanning some new beacon hints could be learned and would
* count as new regulatory hints.
+ * Also if there is any other active beaconing interface we
+ * need not issue a disconnect hint and reset any info such
+ * as chan dfs state, etc.
*/
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
wdev_lock(wdev);
- if (wdev->conn || wdev->current_bss)
+ if (wdev->conn || wdev->current_bss ||
+ cfg80211_beaconing_iface_active(wdev))
is_all_idle = false;
wdev_unlock(wdev);
}