[CRYPTO] padlock: Fix alignment after aes_ctx rearrange

Herbert's patch 82062c72cd643c99a9e1c231270acbab986fd23f 
in cryptodev-2.6 tree breaks alignment rules for PadLock 
xcrypt instruction leading to General protection Oopses.

This patch fixes the problem.

Signed-off-by: Michal Ludvig <michal@logix.cz>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/crypto/padlock-aes.c b/drivers/crypto/padlock-aes.c
index 17ee684144f9..b643d71298a9 100644
--- a/drivers/crypto/padlock-aes.c
+++ b/drivers/crypto/padlock-aes.c
@@ -59,6 +59,9 @@
 #define AES_EXTENDED_KEY_SIZE   64      /* in uint32_t units */
 #define AES_EXTENDED_KEY_SIZE_B (AES_EXTENDED_KEY_SIZE * sizeof(uint32_t))
 
+/* Whenever making any changes to the following
+ * structure *make sure* you keep E, d_data
+ * and cword aligned on 16 Bytes boundaries!!! */
 struct aes_ctx {
         struct {
                 struct cword encrypt;
@@ -66,8 +69,10 @@ struct aes_ctx {
         } cword;
         u32 *D;
         int key_length;
-        u32 E[AES_EXTENDED_KEY_SIZE];
-        u32 d_data[AES_EXTENDED_KEY_SIZE];
+        u32 E[AES_EXTENDED_KEY_SIZE]
+                __attribute__ ((__aligned__(PADLOCK_ALIGNMENT)));
+        u32 d_data[AES_EXTENDED_KEY_SIZE]
+                __attribute__ ((__aligned__(PADLOCK_ALIGNMENT)));
 };
 
 /* ====== Key management routines ====== */