linux-wireless.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH] cfg80211: Prevent regulatory restore during STA disconnect in concurrent interfaces
@ 2018-10-19  9:12 Sriram R
  2018-10-29 13:42 ` [LKP] [cfg80211] d3e95c31e6: hwsim.wnm_bss_tm_nei_11a.fail kernel test robot
  0 siblings, 1 reply; 2+ messages in thread
From: Sriram R @ 2018-10-19  9:12 UTC (permalink / raw)
  To: johannes; +Cc: linux-wireless, Sriram R

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>
---
 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 d536b07..c7047c7 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);
 		}
-- 
2.7.4


^ permalink raw reply related	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2018-10-29 13:57 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-10-19  9:12 [PATCH] cfg80211: Prevent regulatory restore during STA disconnect in concurrent interfaces Sriram R
2018-10-29 13:42 ` [LKP] [cfg80211] d3e95c31e6: hwsim.wnm_bss_tm_nei_11a.fail kernel test robot

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).