netdev - [PATCH net 2/2] net: bcmgenet: call bcmgenet_dma_teardown in bcmgenet_fini

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Date:	Thu, 18 Sep 2014 17:48:17 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, Florian Fainelli <f.fainelli@...il.com>
Subject: [PATCH net 2/2] net: bcmgenet: call bcmgenet_dma_teardown in bcmgenet_fini_dma

We should not be manipulaging the DMA_CTRL registers directly by writing
0 to them to disable DMA. This is an operation that needs to be timed to
make sure the DMA engines have been properly stopped since their state
machine stops on a packet boundary, not immediately.

Make sure that tha bcmgenet_fini_dma() calls bcmgenet_dma_teardown() to
ensure a proper DMA engine state.

Fixes: 1c1008c793fa ("net: bcmgenet: add main driver file")
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index 11a96437862d..5d9eac37993d 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1749,8 +1749,7 @@ static void bcmgenet_fini_dma(struct bcmgenet_priv *priv)
 	int i;
 
 	/* disable DMA */
-	bcmgenet_rdma_writel(priv, 0, DMA_CTRL);
-	bcmgenet_tdma_writel(priv, 0, DMA_CTRL);
+	bcmgenet_dma_teardown(priv);
 
 	for (i = 0; i < priv->num_tx_bds; i++) {
 		if (priv->tx_cbs[i].skb != NULL) {
-- 
1.9.1

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