From 5c27535dc9a0a4858cb3efad2400ffe83c678441 Mon Sep 17 00:00:00 2001
From: Stefan Agner <stefan.agner@toradex.com>
Date: Wed, 23 Aug 2017 09:46:17 -0700
Subject: [PATCH] disk: part: align buffer so it can be used with DMA enabled
 drivers

When using ISO partitions with a DMA enabled block device driver
reading the ISO partition leads to unaligned DMA operations:
  CACHE: Misaligned operation at range [bffb7da8, bffb85a8]

Align the buffer to make sure we pass a buffer which works for
DMA operations.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---
 disk/part_iso.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/disk/part_iso.c b/disk/part_iso.c
index bb8ed658f2..8aef251f4e 100644
--- a/disk/part_iso.c
+++ b/disk/part_iso.c
@@ -24,7 +24,7 @@
 #undef CHECK_FOR_POWERPC_PLATTFORM
 #define CD_SECTSIZE 2048
 
-static unsigned char tmpbuf[CD_SECTSIZE];
+static unsigned char tmpbuf[CD_SECTSIZE] __aligned(ARCH_DMA_MINALIGN);
 
 unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start,
                         lbaint_t blkcnt, void *buffer)
-- 
2.39.5