crypto: crypto4xx - Fix gcc12 uninitialized warning in crypto4xx_crypt

The compiler gcc 12 warns about the IV buffer being uninitialized
in crypto4xx_crypt. Silence the warning by using the new gcc 12
access attribute to mark crypto4xx_build_pd.

Also fix the IV buffer length as it has been quadrupled (64 instead
of 16).

Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/amcc/crypto4xx_alg.c

···
 {
 	struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
 	struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
-	__le32 iv[AES_IV_SIZE];
+	__le32 iv[AES_IV_SIZE / 4];
 
 	if (check_blocksize && !IS_ALIGNED(req->cryptlen, AES_BLOCK_SIZE))
 		return -EINVAL;
···
 	struct crypto4xx_ctx *ctx  = crypto_tfm_ctx(req->base.tfm);
 	struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
-	__le32 iv[16];
+	__le32 iv[4];
 	u32 tmp_sa[SA_AES128_CCM_LEN + 4];
 	struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa;
 	unsigned int len = req->cryptlen;

drivers/crypto/amcc/crypto4xx_core.c

···
 		       struct scatterlist *src,
 		       struct scatterlist *dst,
 		       const unsigned int datalen,
-		       const __le32 *iv, const u32 iv_len,
+		       const void *iv, const u32 iv_len,
 		       const struct dynamic_sa_ctl *req_sa,
 		       const unsigned int sa_len,
 		       const unsigned int assoclen,

drivers/crypto/amcc/crypto4xx_core.h

···
 	struct crypto4xx_device *dev;
 };
 
+#if IS_ENABLED(CONFIG_CC_IS_GCC) && CONFIG_GCC_VERSION >= 120000
+#define BUILD_PD_ACCESS __attribute__((access(read_only, 6, 7)))
+#else
+#define BUILD_PD_ACCESS
+#endif
+
 int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
 void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
 int crypto4xx_build_pd(struct crypto_async_request *req,
···
 		       struct scatterlist *src,
 		       struct scatterlist *dst,
 		       const unsigned int datalen,
-		       const __le32 *iv, const u32 iv_len,
+		       const void *iv, const u32 iv_len,
 		       const struct dynamic_sa_ctl *sa,
 		       const unsigned int sa_len,
 		       const unsigned int assoclen,
-		       struct scatterlist *dst_tmp);
+		       struct scatterlist *dst_tmp) BUILD_PD_ACCESS;
 int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
 			     const u8 *key, unsigned int keylen);
 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,