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>
diff --git a/disk/part_iso.c b/disk/part_iso.c
index bb8ed65..8aef251 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)