[PATCH mt76] wifi: mt76: Fix memory leak destroying device

[Lorenzo Bianconi]

All MT76 rx queues have an associated page_pool even if the queue is not
associated to a NAPI (e.g. WED RRO queues with WED enabled). Destroy the
page_pool running mt76_dma_cleanup routine during module unload.
Moreover returns pages to the page pool if WED is not enabled for WED RRO
queues.

Fixes: 950d0abb5cd94 ("wifi: mt76: mt7996: add wed rx support")
Signed-off-by: Lorenzo Bianconi <lorenzo at kernel.org>
---
 drivers/net/wireless/mediatek/mt76/dma.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c
index f240016ed9f0ead27e98e350f4fdb818e1686781..893ac14285cab3c22f70945d490627a64b643efe 100644
--- a/drivers/net/wireless/mediatek/mt76/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/dma.c
@@ -874,7 +874,12 @@ mt76_dma_rx_cleanup(struct mt76_dev *dev, struct mt76_queue *q)
 		if (!buf)
 			break;
 
-		if (!mt76_queue_is_wed_rro(q))
+		if (mtk_wed_device_active(&dev->mmio.wed) &&
+		    mt76_queue_is_wed_rro(q))
+			continue;
+
+		if (!mt76_queue_is_wed_rro_rxdmad_c(q) &&
+		    !mt76_queue_is_wed_rro_ind(q))
 			mt76_put_page_pool_buf(buf, false);
 	} while (1);
 
@@ -1168,10 +1173,6 @@ void mt76_dma_cleanup(struct mt76_dev *dev)
 	mt76_for_each_q_rx(dev, i) {
 		struct mt76_queue *q = &dev->q_rx[i];
 
-		if (mtk_wed_device_active(&dev->mmio.wed) &&
-		    mt76_queue_is_wed_rro(q))
-			continue;
-
 		netif_napi_del(&dev->napi[i]);
 		mt76_dma_rx_cleanup(dev, q);
 

---
base-commit: 53d1548612670aa8b5d89745116cc33d9d172863
change-id: 20251208-mt76-fix-memory-leak-183680b1aff0

Best regards,
-- 
Lorenzo Bianconi <lorenzo at kernel.org>