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Diffstat (limited to 'target/linux/brcm63xx/patches-4.4/001-4.15-09-bcm63xx_enet-do-not-write-to-random-DMA-channel-on-B.patch')
-rw-r--r--target/linux/brcm63xx/patches-4.4/001-4.15-09-bcm63xx_enet-do-not-write-to-random-DMA-channel-on-B.patch29
1 files changed, 29 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-4.4/001-4.15-09-bcm63xx_enet-do-not-write-to-random-DMA-channel-on-B.patch b/target/linux/brcm63xx/patches-4.4/001-4.15-09-bcm63xx_enet-do-not-write-to-random-DMA-channel-on-B.patch
new file mode 100644
index 0000000000..22c6d01873
--- /dev/null
+++ b/target/linux/brcm63xx/patches-4.4/001-4.15-09-bcm63xx_enet-do-not-write-to-random-DMA-channel-on-B.patch
@@ -0,0 +1,29 @@
+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);
+