[08/16] mac80211: do drv_reconfig_complete() before restarting all

Commit Message

Luca Coelho Nov. 29, 2021, 1:32 p.m. UTC

From: Johannes Berg <[e-mail]>

When we reconfigure, the driver might do some things to complete
the reconfiguration. It's strange and could be broken in some
cases because we restart other works (e.g. remain-on-channel and
TX) before this happens, yet only start queues later.

Change this to do the reconfig complete when reconfiguration is
actually complete, not when we've already started doing other
things again.

For iwlwifi, this should fix a race where the reconfig can race
with TX, for ath10k and ath11k that also use this it won't make
a difference because they just start queues there, and mac80211
also stopped the queues and will restart them later as before.

Signed-off-by: Johannes Berg <[e-mail]>
Signed-off-by: Luca Coelho <[e-mail]>
---
 net/mac80211/util.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

Patch

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 43df2f0c5db9..4b102d5863cf 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -2646,6 +2646,13 @@  int ieee80211_reconfig(struct ieee80211_local *local)
 		mutex_unlock(&local->sta_mtx);
 	}
 
+	/*
+	 * If this is for hw restart things are still running.
+	 * We may want to change that later, however.
+	 */
+	if (local->open_count && (!suspended || reconfig_due_to_wowlan))
+		drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
+
 	if (local->in_reconfig) {
 		local->in_reconfig = false;
 		barrier();
@@ -2664,13 +2671,6 @@  int ieee80211_reconfig(struct ieee80211_local *local)
 					IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 					false);
 
-	/*
-	 * If this is for hw restart things are still running.
-	 * We may want to change that later, however.
-	 */
-	if (local->open_count && (!suspended || reconfig_due_to_wowlan))
-		drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
-
 	if (!suspended)
 		return 0;