From fb818ab727bf2c77eff960b8f692c689abdb6127 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 28 Feb 2016 18:50:46 +0100
Subject: [PATCH] dma: write cpu index after queue flush, useful for hardware
 resets

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---
 dma.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/dma.c b/dma.c
index dff9bd6a..16dd5f3b 100644
--- a/dma.c
+++ b/dma.c
@@ -155,10 +155,12 @@ mt76_dma_tx_cleanup(struct mt76_dev *dev, enum mt76_txq_id qid, bool flush)
 		if (!flush && q->tail == last)
 		    last = ioread32(&q->regs->dma_idx);
 	}
-	if (!flush)
+	if (!flush) {
 		mt76_txq_schedule(dev, q);
-	else
+	} else {
 		iowrite32(q->tail, &q->regs->dma_idx);
+		iowrite32(q->head, &q->regs->cpu_idx);
+	}
 	spin_unlock_bh(&q->lock);
 }