[PATCH 2/2] boot: extlinux: Fix unaligned buffer for reading data from file system

[Nam Cao]

extlinux_read_bootflow() allocates a buffer to read from file system
without any alignment.

But for some block devices which transfer data via DMA, ARCH_DMA_MINALIGN
alignment is required. For example, due to misaligned buffer, the below
boot failure is observed.

=> boot
CACHE: Misaligned operation at range [9efa25f8, 9efa27f8]
CACHE: Misaligned operation at range [9efa25f8, 9efa27f8]
CACHE: Misaligned operation at range [9efa25f8, 9efa27f8]
CACHE: Misaligned operation at range [9efa25f8, 9efa27f8]
** Booting bootflow 'mmc at 2194000.bootdev.part_1' with extlinux
Ignoring unknown command: �D���D��
Boot failed (err=-14)

Change the alignment to default (which is ARCH_DMA_MINALIGN).

Fixes: 31aefaf89a5b ("bootstd: Add an implementation of distro boot")
Signed-off-by: Nam Cao <namcao at linutronix.de>
Tested-by: Javier Fernandez Pastrana <javier.pastrana at linutronix.de>
---
 boot/bootmeth_extlinux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/boot/bootmeth_extlinux.c b/boot/bootmeth_extlinux.c
index ae0ad1d53e3..5424d179bf8 100644
--- a/boot/bootmeth_extlinux.c
+++ b/boot/bootmeth_extlinux.c
@@ -127,7 +127,7 @@ static int extlinux_read_bootflow(struct udevice *dev, struct bootflow *bflow)
 		return log_msg_ret("try", ret);
 	size = bflow->size;
 
-	ret = bootmeth_alloc_file(bflow, 0x10000, 1);
+	ret = bootmeth_alloc_file(bflow, 0x10000, 0);
 	if (ret)
 		return log_msg_ret("read", ret);
 
-- 
2.39.5