From 113f3aaa81bd56aba02659786ed65cbd9cb9a6fc Mon Sep 17 00:00:00 2001
From: Sriram R <srirrama@codeaurora.org>
Date: Fri, 19 Oct 2018 14:42:59 +0530
Subject: [PATCH] cfg80211: Prevent regulatory restore during STA disconnect in concurrent interfaces
Git-commit: 113f3aaa81bd56aba02659786ed65cbd9cb9a6fc
Patch-mainline: v4.20-rc6
References: bsc#1051510
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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 1c93412038dc..f741d8376a46 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);
}
--
2.16.4