openwrt/target/linux/brcm63xx/patches-4.9/001-4.15-09-bcm63xx_enet-do-not-write-to-random-DMA-channel-on-B.patch
Jonas Gorski b0c5e8b927 brcm63xx: add kernel 4.9 support
Add support for kernel 4.9 based on the more upstream comformant
partition defintions. Increases compressed kernel size by ~95k
compared to 4.4.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
2018-02-11 23:15:05 +01:00

30 lines
1.1 KiB
Diff

From 23d94cb855b6f4f0ee1c01679224472104ac6440 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jonas.gorski@gmail.com>
Date: Sat, 30 Sep 2017 14:10:18 +0200
Subject: [PATCH 2/6] bcm63xx_enet: do not write to random DMA channel on
BCM6345
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>
---
drivers/net/ethernet/broadcom/bcm63xx_enet.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- 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_devi
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);