[PATCH] fs: ext4: Fix alignment of cache buffers

[Jan Kiszka]

From: Jan Kiszka <jan.kis...@siemens.com>

We need to align the cache buffer to ARCH_DMA_MINALIGN in order to avoid
access errors like

CACHE: Misaligned operation at range [be0231e0, be0235e0]

seen on the MCIMX7SABRE.

Fixes: d5aee659f217 ("fs: ext4: cache extent data")
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
 fs/ext4/ext4fs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
index 1c616a26a2..966b427a97 100644
--- a/fs/ext4/ext4fs.c
+++ b/fs/ext4/ext4fs.c
@@ -288,7 +288,7 @@ int ext_cache_read(struct ext_block_cache *cache, lbaint_t 
block, int size)
        if (cache->buf && cache->block == block && cache->size == size)
                return 1;
        ext_cache_fini(cache);
-       cache->buf = malloc(size);
+       cache->buf = memalign(ARCH_DMA_MINALIGN, size);
        if (!cache->buf)
                return 0;
        if (!ext4fs_devread(block, 0, size, cache->buf)) {
-- 
2.16.4


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