From: Felix Fietkau Date: Tue, 24 Mar 2020 10:57:43 +0000 (+0100) Subject: mt76: add memory barrier to DMA queue kick X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2d68104742a90f035ee8ceaddf322f6e2da32f70;p=linux.git mt76: add memory barrier to DMA queue kick Ensure that descriptor memory has been fully written before letting the hardware read it Signed-off-by: Felix Fietkau --- diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c index 7545b552db252..24ff21eedbd0f 100644 --- a/drivers/net/wireless/mediatek/mt76/dma.c +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -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); }