To avoid having the hardware potentially write to memory behind stale descriptors, set the dma-done flag on all of them before cleaning up allocated rx buffers Signed-off-by: Felix Fietkau <nbd@xxxxxxxx> --- drivers/net/wireless/mediatek/mt76/dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c index f88d017ff987..2298a4e91943 100644 --- a/drivers/net/wireless/mediatek/mt76/dma.c +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -437,7 +437,7 @@ mt76_dma_rx_reset(struct mt76_dev *dev, enum mt76_rxq_id qid) int i; for (i = 0; i < q->ndesc; i++) - q->desc[i].ctrl &= ~cpu_to_le32(MT_DMA_CTL_DMA_DONE); + q->desc[i].ctrl = cpu_to_le32(MT_DMA_CTL_DMA_DONE); mt76_dma_rx_cleanup(dev, q); mt76_dma_sync_idx(dev, q); -- 2.24.0
