openwrt/target/linux/generic/backport-5.15/752-05-v6.7-net-ethernet-mtk_wed-do-not-assume-offload-callbacks.patch

From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Wed, 13 Sep 2023 20:42:47 +0200
Subject: [PATCH] net: ethernet: mtk_wed: do not assume offload callbacks are
 always set

Check if wlan.offload_enable and wlan.offload_disable callbacks are set
in mtk_wed_flow_add/mtk_wed_flow_remove since mt7996 will not rely
on them.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -1712,19 +1712,20 @@ mtk_wed_irq_set_mask(struct mtk_wed_devi
 int mtk_wed_flow_add(int index)
 {
 	struct mtk_wed_hw *hw = hw_list[index];
-	int ret;
+	int ret = 0;
 
-	if (!hw || !hw->wed_dev)
-		return -ENODEV;
+	mutex_lock(&hw_lock);
 
-	if (hw->num_flows) {
-		hw->num_flows++;
-		return 0;
+	if (!hw || !hw->wed_dev) {
+		ret = -ENODEV;
+		goto out;
 	}
 
-	mutex_lock(&hw_lock);
-	if (!hw->wed_dev) {
-		ret = -ENODEV;
+	if (!hw->wed_dev->wlan.offload_enable)
+		goto out;
+
+	if (hw->num_flows) {
+		hw->num_flows++;
 		goto out;
 	}
 
@@ -1743,14 +1744,15 @@ void mtk_wed_flow_remove(int index)
 {
 	struct mtk_wed_hw *hw = hw_list[index];
 
-	if (!hw)
-		return;
+	mutex_lock(&hw_lock);
 
-	if (--hw->num_flows)
-		return;
+	if (!hw || !hw->wed_dev)
+		goto out;
 
-	mutex_lock(&hw_lock);
-	if (!hw->wed_dev)
+	if (!hw->wed_dev->wlan.offload_disable)
+		goto out;
+
+	if (--hw->num_flows)
 		goto out;
 
 	hw->wed_dev->wlan.offload_disable(hw->wed_dev);