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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 <[email protected]>
This commit is contained in:
Felix Fietkau
2019-12-05 18:32:28 +01:00
parent f3348f5408
commit 947d20ddbf
1 changed files with 1 additions and 1 deletions
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dma.c
+1 -1
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@@ -427,7 +427,7 @@ 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);