[PATCH 098/379][SRU][OEM-5.6] ath11k: fix mgmt_tx_wmi cmd sent to FW for deleted vdev

[You-Sheng Yang]

From: Sathishkumar Muruganandam <murugana at codeaurora.org>

BugLink: https://bugs.launchpad.net/bugs/1879633

In Multi-AP VAP scenario with frequent interface up-down, there is a
chance that ath11k_mgmt_over_wmi_tx_work() will dequeue a skb
corresponding to currently deleted/stopped vdev.

FW will assert on receiving mgmt_tx_wmi cmd for already deleted vdev.
Hence adding validation checks for arvif present on the corresponding
ar before sending mgmt_tx_wmi cmd.

Signed-off-by: Sathishkumar Muruganandam <murugana at codeaurora.org>
Signed-off-by: Kalle Valo <kvalo at codeaurora.org>
Link: https://lore.kernel.org/r/1588049126-1490-2-git-send-email-murugana@codeaurora.org
(cherry picked from commit 66307ca040575e6200a5d40656e2dee71d9da91c)
Signed-off-by: You-Sheng Yang <vicamo.yang at canonical.com>
---
 drivers/net/wireless/ath/ath11k/mac.c | 29 ++++++++++++++++++++-------
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index a356cd305295..6506022da4fb 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -3792,15 +3792,30 @@ static void ath11k_mgmt_over_wmi_tx_work(struct work_struct *work)
 
 	while ((skb = skb_dequeue(&ar->wmi_mgmt_tx_queue)) != NULL) {
 		info = IEEE80211_SKB_CB(skb);
-		arvif = ath11k_vif_to_arvif(info->control.vif);
-
-		ret = ath11k_mac_mgmt_tx_wmi(ar, arvif, skb);
-		if (ret) {
-			ath11k_warn(ar->ab, "failed to transmit management frame %d\n",
-				    ret);
+		if (!info->control.vif) {
+			ath11k_warn(ar->ab, "no vif found for mgmt frame, flags 0x%x\n",
+				    info->control.flags);
 			ieee80211_free_txskb(ar->hw, skb);
+			continue;
+		}
+
+		arvif = ath11k_vif_to_arvif(info->control.vif);
+		if (ar->allocated_vdev_map & (1LL << arvif->vdev_id) &&
+		    arvif->is_started) {
+			ret = ath11k_mac_mgmt_tx_wmi(ar, arvif, skb);
+			if (ret) {
+				ath11k_warn(ar->ab, "failed to tx mgmt frame, vdev_id %d :%d\n",
+					    arvif->vdev_id, ret);
+				ieee80211_free_txskb(ar->hw, skb);
+			} else {
+				atomic_inc(&ar->num_pending_mgmt_tx);
+			}
 		} else {
-			atomic_inc(&ar->num_pending_mgmt_tx);
+			ath11k_warn(ar->ab,
+				    "dropping mgmt frame for vdev %d, flags 0x%x is_started %d\n",
+				    arvif->vdev_id, info->control.flags,
+				    arvif->is_started);
+			ieee80211_free_txskb(ar->hw, skb);
 		}
 	}
 }
-- 
2.29.2