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mt76: add memory barrier to DMA queue kick

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Ensure that descriptor memory has been fully written before letting the
hardware read it

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
2020-03-24 11:57:43 +01:00
parent c32011bbde
commit 2d68104742
1 changed files with 1 additions and 0 deletions
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1
drivers/net/wireless/mediatek/mt76/dma.c
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@@ -143,6 +143,7 @@ mt76_dma_sync_idx(struct mt76_dev *dev, struct mt76_queue *q)
static void
mt76_dma_kick_queue(struct mt76_dev *dev, struct mt76_queue *q)
{
wmb();
writel(q->head, &q->regs->cpu_idx);
}