[U-Boot] [PATCH 1/2] part_dos: allocate cacheline aligned buffers

[Thierry Reding]

Some hardware requires the data buffers to be cacheline-aligned to make
sure DMA operations can be properly executed.

This patch uses the ALLOC_CACHE_ALIGN_BUFFER macro to allocate buffers
with proper alignment. The same was already done for EFI partitions in
commit f75dd58 "part_efi: dcache: allocate cacheline aligned buffers".

Signed-off-by: Thierry Reding <thierry.reding at avionic-design.de>
---
This fixes boot failures on Avionic Design Plutux and Medcom boards.

 disk/part_dos.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/disk/part_dos.c b/disk/part_dos.c
index b5bcb37..c028aaf 100644
--- a/disk/part_dos.c
+++ b/disk/part_dos.c
@@ -87,7 +87,7 @@ static int test_block_type(unsigned char *buffer)
 
 int test_part_dos (block_dev_desc_t *dev_desc)
 {
-	unsigned char buffer[dev_desc->blksz];
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 
 	if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) ||
 	    (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
@@ -102,7 +102,7 @@ int test_part_dos (block_dev_desc_t *dev_desc)
 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative,
 							   int part_num)
 {
-	unsigned char buffer[dev_desc->blksz];
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 	dos_partition_t *pt;
 	int i;
 
@@ -166,7 +166,7 @@ static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part
 				 int relative, int part_num,
 				 int which_part, disk_partition_t *info)
 {
-	unsigned char buffer[dev_desc->blksz];
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 	dos_partition_t *pt;
 	int i;
 
-- 
1.7.10