[PATCH 1/6] wifi: mac80211: remove an unnecessary copy

[Chien Wong <m@xv97.com>]

Using a temporary buffer for saving the CMAC result is useless.
With the patch, ieee80211_aes_cmac() just resembles
ieee80211_aes_cmac_256().

Compile test only.

Fixes: 26717828b75d ("mac80211: aes-cmac: switch to shash CMAC driver")
Signed-off-by: Chien Wong <m@xv97.com>
---
 net/mac80211/aes_cmac.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/net/mac80211/aes_cmac.c b/net/mac80211/aes_cmac.c
index 48c04f89de20..a9a5b2396096 100644
--- a/net/mac80211/aes_cmac.c
+++ b/net/mac80211/aes_cmac.c
@@ -26,7 +26,6 @@ void ieee80211_aes_cmac(struct crypto_shash *tfm, const u8 *aad,
 			const u8 *data, size_t data_len, u8 *mic)
 {
 	SHASH_DESC_ON_STACK(desc, tfm);
-	u8 out[AES_BLOCK_SIZE];
 	const __le16 *fc;
 
 	desc->tfm = tfm;
@@ -41,9 +40,7 @@ void ieee80211_aes_cmac(struct crypto_shash *tfm, const u8 *aad,
 	} else {
 		crypto_shash_update(desc, data, data_len - CMAC_TLEN);
 	}
-	crypto_shash_finup(desc, zero, CMAC_TLEN, out);
-
-	memcpy(mic, out, CMAC_TLEN);
+	crypto_shash_finup(desc, zero, CMAC_TLEN, mic);
 }
 
 void ieee80211_aes_cmac_256(struct crypto_shash *tfm, const u8 *aad,
-- 
2.51.2