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mt76: fix rx dma ring descriptor state on reset

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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@nbd.name>
This commit is contained in:
Felix Fietkau 2019-12-05 17:32:41 +01:00
parent 3e3848280f
commit 2703bafcdb
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/mediatek/mt76/dma.c
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@ -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);