From: Felix Fietkau <nbd@nbd.name>
To: linux-wireless@vger.kernel.org
Subject: [PATCH 8/9] mt76: add memory barrier to DMA queue kick
Date: Tue, 25 Aug 2020 07:29:08 +0200 [thread overview]
Message-ID: <20200825052909.36955-8-nbd@nbd.name> (raw)
In-Reply-To: <20200825052909.36955-1-nbd@nbd.name>
Ensure that descriptor memory has been fully written before letting the
hardware read it
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
drivers/net/wireless/mediatek/mt76/dma.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c
index 7545b552db25..24ff21eedbd0 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);
}
--
2.28.0
next prev parent reply other threads:[~2020-08-25 5:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-25 5:29 [PATCH 1/9] mt76: mt7615: fix reading airtime statistics Felix Fietkau
2020-08-25 5:29 ` [PATCH 2/9] mt76: mt7915: optimize mt7915_mac_sta_poll Felix Fietkau
2020-08-25 5:29 ` [PATCH 3/9] mt76: dma: update q->queued immediately on cleanup Felix Fietkau
2020-08-25 5:29 ` [PATCH 4/9] mt76: mt7915: schedule tx tasklet in mt7915_mac_tx_free Felix Fietkau
2020-08-25 5:29 ` [PATCH 5/9] mt76: mt7915: significantly reduce interrupt load Felix Fietkau
2020-08-25 5:29 ` [PATCH 6/9] mt76: mt7615: " Felix Fietkau
2020-08-25 5:29 ` [PATCH 7/9] mt76: mt7915: add support for accessing mapped registers via bus ops Felix Fietkau
2020-08-25 5:29 ` Felix Fietkau [this message]
2020-08-25 5:29 ` [PATCH 9/9] mt76: mt7603: check for single-stream EEPROM configuration Felix Fietkau
2020-08-25 11:42 ` [PATCH v2 " Felix Fietkau
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