From 88db676f8517dc6305cb77900cd97ebda1d0208f Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Thu, 5 Dec 2019 17:32:41 +0100 Subject: [PATCH] mt76: fix rx dma ring descriptor state on reset 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 --- dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/dma.c b/dma.c index a7299e15..4747f994 100644 --- a/dma.c +++ b/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);