spl: Set FAT bl_len to ARCH_DMA_MINALIGN
Instead of relying on the presence of filename to determine whether we are
dealing with a FAT filesystem (and should DMA-align the buffer), have FAT set
bl_len to ARCH_DMA_MINALIGN instead. With this done, we can remove the
special-case logic checking for the presence of filename.
Because filesystems are not block-based, we may read less than the size passed
to spl_load_info.read. This can happen if the file size is not DMA-aligned. This
is fine as long as we read the amount we originally wanted to. Modify the
conditions for callers of spl_load_info.read to check against the original,
unaligned size to avoid failing spuriously.
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/common/spl/spl_blk_fs.c b/common/spl/spl_blk_fs.c
index 144c8a6..c105c55 100644
--- a/common/spl/spl_blk_fs.c
+++ b/common/spl/spl_blk_fs.c
@@ -9,6 +9,7 @@
#include <spl.h>
#include <image.h>
#include <fs.h>
+#include <asm/cache.h>
#include <asm/io.h>
struct blk_dev {
@@ -85,7 +86,7 @@
debug("Found FIT\n");
load.read = spl_fit_read;
- load.bl_len = 1;
+ load.bl_len = ARCH_DMA_MINALIGN;
load.filename = (void *)filename;
load.priv = &dev;