From 7dd56ef00aa924fac2db7b3dee6836202f8fb749 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jonas.gorski@gmail.com>
Date: Sun, 1 Oct 2017 13:02:16 +0200
Subject: [PATCH 09/24] bcm63xx_enet: do not write to random DMA channel on
BCM6345
Git-commit: d6213c1f2ad54a964b77471690264ed685718928
Patch-mainline: v4.15-rc1
References: git-fixes
The DMA controller regs actually point to DMA channel 0, so the write to
ENETDMA_CFG_REG will actually modify a random DMA channel.
Since DMA controller registers do not exist on BCM6345, guard the write
with the usual check for dma_has_sram.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
drivers/net/ethernet/broadcom/bcm63xx_enet.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 85c4ddd827f4..ba66fbe14d5c 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -1063,7 +1063,8 @@ static int bcm_enet_open(struct net_device *dev)
val = enet_readl(priv, ENET_CTL_REG);
val |= ENET_CTL_ENABLE_MASK;
enet_writel(priv, val, ENET_CTL_REG);
- enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
+ if (priv->dma_has_sram)
+ enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
enet_dmac_writel(priv, priv->dma_chan_en_mask,
ENETDMAC_CHANCFG, priv->rx_chan);
--
2.16.4