From 963911e9e1c17b2f973ff49ddd51060d6c340c5f Mon Sep 17 00:00:00 2001
From: Sean Anderson <seanga2@gmail.com>
Date: Mon, 12 Oct 2020 14:18:15 -0400
Subject: [PATCH] riscv: k210: Reduce DMA block size

Although the max DMA size supported by the hardware register is 22 bits (or
4M), the Linux driver for this device only supports transfers of up to 2M.
On a device with 8M total memory, I don't think it will make too much of a
difference.

Reported-by: Damien Le Moal <Damien.LeMoal@wdc.com>
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Rick Chen <rick@andestech.com>
---
 arch/riscv/dts/k210.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/dts/k210.dtsi b/arch/riscv/dts/k210.dtsi
index 7605c01f3c..81ef8ca4f7 100644
--- a/arch/riscv/dts/k210.dtsi
+++ b/arch/riscv/dts/k210.dtsi
@@ -200,8 +200,8 @@
 			dma-channels = <6>;
 			snps,dma-masters = <2>;
 			snps,data-width = <5>;
-			snps,block-size = <0x400000 0x400000 0x400000
-					   0x400000 0x400000 0x400000>;
+			snps,block-size = <0x200000 0x200000 0x200000
+					   0x200000 0x200000 0x200000>;
 			snps,axi-max-burst-len = <256>;
 			status = "disabled";
 		};
-- 
2.39.5