From: Sriram R srirrama@codeaurora.org
[ 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 --- net/wireless/sme.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/net/wireless/sme.c b/net/wireless/sme.c index d014aea07160c..66cccd16c24af 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); }