ath10k: defer AP self-peer removal wait

Some firmware revisions don't notify host about
self-bss-peer removal until after associated vdev
is deleted. This has been observed with qca6174
WLAN.RM.2.0-00073 firmware.

This patch fixes AP teardown slowdowns and
prevents delays and warnings:

 ath10k_pci 0000:00:05.0: failed to remove peer for AP vdev 0: -110
 ath10k_pci 0000:00:05.0: removing stale peer xx:xx:xx:xx:xx:xx from vdev_id 0
 ath10k_pci 0000:00:05.0: peer-unmap-event: unknown peer id 24
 ath10k_pci 0000:00:05.0: peer-unmap-event: unknown peer id 8

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 6865938..a367450 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3332,9 +3332,10 @@ static void ath10k_remove_interface(struct ieee80211_hw *hw,
        list_del(&arvif->list);
 
        if (arvif->vdev_type == WMI_VDEV_TYPE_AP) {
-               ret = ath10k_peer_delete(arvif->ar, arvif->vdev_id, vif->addr);
+               ret = ath10k_wmi_peer_delete(arvif->ar, arvif->vdev_id,
+                                            vif->addr);
                if (ret)
-                       ath10k_warn(ar, "failed to remove peer for AP vdev %i: %d\n",
+                       ath10k_warn(ar, "failed to submit AP self-peer removal on vdev %i: %d\n",
                                    arvif->vdev_id, ret);
 
                kfree(arvif->u.ap.noa_data);
@@ -3348,6 +3349,21 @@ static void ath10k_remove_interface(struct ieee80211_hw *hw,
                ath10k_warn(ar, "failed to delete WMI vdev %i: %d\n",
                            arvif->vdev_id, ret);
 
+       /* Some firmware revisions don't notify host about self-peer removal
+        * until after associated vdev is deleted.
+        */
+       if (arvif->vdev_type == WMI_VDEV_TYPE_AP) {
+               ret = ath10k_wait_for_peer_deleted(ar, arvif->vdev_id,
+                                                  vif->addr);
+               if (ret)
+                       ath10k_warn(ar, "failed to remove AP self-peer on vdev %i: %d\n",
+                                   arvif->vdev_id, ret);
+
+               spin_lock_bh(&ar->data_lock);
+               ar->num_peers--;
+               spin_unlock_bh(&ar->data_lock);
+       }
+
        ath10k_peer_cleanup(ar, arvif->vdev_id);
 
        mutex_unlock(&ar->conf_mutex);