[PATCH net v6 3/4] net: ethernet: mtk_wed: free up rings during detach

[Zhi-Jun You <hujy652@gmail.com>]

During __mtk_wed_detach, rx_ring and tx_wdma aren't freed up.

Fix this by add them to mtk_wed_free_rx_rings.

This patch is pulled from mtk-openwrt-feeds to address Sashiko's review
and edit to rely on ring->desc instead of an extra flag.

Link: https://github.com/mediatek/mtk-openwrt-feeds/blob/main/25.12/files/target/linux/mediatek/patches-6.12/999-wed-04-Fix-reinsert-wifi-module-cause-memory-leak-issue.patch
Fixes: 4c5de09eb0d0 ("net: ethernet: mtk_wed: add configure wed wo support")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Link: https://sashiko.dev/#/message/179000700034.2160803.10594281691384015089%40kernel.org
Signed-off-by: Zhi-Jun You <hujy652@gmail.com>
---
 drivers/net/ethernet/mediatek/mtk_wed.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c
index 3f0be70c3f14..3044a7a8ea03 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -949,6 +949,14 @@ mtk_wed_free_ring(struct mtk_wed_device *dev, struct mtk_wed_ring *ring)
 static void
 mtk_wed_free_rx_rings(struct mtk_wed_device *dev)
 {
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(dev->rx_ring); i++)
+		mtk_wed_free_ring(dev, &dev->rx_ring[i]);
+
+	for (i = 0; i < ARRAY_SIZE(dev->tx_wdma); i++)
+		mtk_wed_free_ring(dev, &dev->tx_wdma[i]);
+
 	mtk_wed_free_rx_buffer(dev);
 	mtk_wed_free_ring(dev, &dev->rro.ring);
 }

-- 
2.55.0