[PATCH 2/6] crypto: img-hash - Fix hash request context

[Will Thomas <will.thomas@imgtec.com>]

Move 0 length buffer to end of structure to stop overwriting
fallback request data. This doesn't cause a bug itself as the
buffer is never used alongside the fallback but should be
changed.

Signed-off-by: Will Thomas <will.thomas@imgtec.com>
Reviewed-by: James Hartley <james.hartley@imgtec.com>
---
 drivers/crypto/img-hash.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c
index a5f270b..7fa6aa4 100644
--- a/drivers/crypto/img-hash.c
+++ b/drivers/crypto/img-hash.c
@@ -102,8 +102,10 @@ struct img_hash_request_ctx {
 	unsigned long		op;
 
 	size_t			bufcnt;
-	u8 buffer[0] __aligned(sizeof(u32));
 	struct ahash_request	fallback_req;
+
+	/* Zero length buffer must remain last member of struct */
+	u8 buffer[0] __aligned(sizeof(u32));
 };
 
 struct img_hash_ctx {
-- 
2.1.4