[PATCH 1/4] net: calxedaxgmac: fix net timeout recovery

[Rob Herring]

From: Rob Herring <rob.herring@xxxxxxxxxxx>

Fix net tx watchdog timeout recovery. The descriptor ring was reset,
but the DMA engine was not reset to the beginning of the ring.

Signed-off-by: Rob Herring <rob.herring@xxxxxxxxxxx>
---
 drivers/net/ethernet/calxeda/xgmac.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/calxeda/xgmac.c b/drivers/net/ethernet/calxeda/xgmac.c
index 11f667f..c4fd2e3 100644
--- a/drivers/net/ethernet/calxeda/xgmac.c
+++ b/drivers/net/ethernet/calxeda/xgmac.c
@@ -933,6 +933,7 @@ static void xgmac_tx_err(struct xgmac_priv *priv)
 	desc_init_tx_desc(priv->dma_tx, DMA_TX_RING_SZ);
 	priv->tx_tail = 0;
 	priv->tx_head = 0;
+	writel(priv->dma_tx_phy, priv->base + XGMAC_DMA_TX_BASE_ADDR);
 	writel(reg | DMA_CONTROL_ST, priv->base + XGMAC_DMA_CONTROL);
 
 	writel(DMA_STATUS_TU | DMA_STATUS_TPS | DMA_STATUS_NIS | DMA_STATUS_AIS,
-- 
1.7.9.5

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