mac80211: pass scratch buffer directly, remove additional pointers

Recalculate the offset pointers in the ccmp calculations rather than
in the callers.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/net/mac80211/aes_ccm.c b/net/mac80211/aes_ccm.c
index 4d4c2dfcf9a0..e756ed931164 100644
--- a/net/mac80211/aes_ccm.c
+++ b/net/mac80211/aes_ccm.c
@@ -53,15 +53,17 @@ static inline void aes_ccm_prepare(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
 
 
 void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch,
-                               u8 *b_0, u8 *aad, u8 *data, size_t data_len,
+                               u8 *data, size_t data_len,
                                u8 *cdata, u8 *mic)
 {
         int i, j, last_len, num_blocks;
-        u8 *pos, *cpos, *b, *s_0, *e;
+        u8 *pos, *cpos, *b, *s_0, *e, *b_0, *aad;
 
         b = scratch;
         s_0 = scratch + AES_BLOCK_LEN;
         e = scratch + 2 * AES_BLOCK_LEN;
+        b_0 = scratch + 3 * AES_BLOCK_LEN;
+        aad = scratch + 4 * AES_BLOCK_LEN;
 
         num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN);
         last_len = data_len % AES_BLOCK_LEN;
@@ -92,15 +94,16 @@ void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch,
 
 
 int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *scratch,
-                              u8 *b_0, u8 *aad, u8 *cdata, size_t data_len,
-                              u8 *mic, u8 *data)
+                              u8 *cdata, size_t data_len, u8 *mic, u8 *data)
 {
         int i, j, last_len, num_blocks;
-        u8 *pos, *cpos, *b, *s_0, *a;
+        u8 *pos, *cpos, *b, *s_0, *a, *b_0, *aad;
 
         b = scratch;
         s_0 = scratch + AES_BLOCK_LEN;
         a = scratch + 2 * AES_BLOCK_LEN;
+        b_0 = scratch + 3 * AES_BLOCK_LEN;
+        aad = scratch + 4 * AES_BLOCK_LEN;
 
         num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN);
         last_len = data_len % AES_BLOCK_LEN;