crypto: bcm - remove unused function do_decrypt()

The do_decrypt() function in util.c in the BCM crypto driver is never
used, so remove it.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/bcm/util.c

@@ -201,46 +201,6 @@ struct sdesc {
 	char ctx[];
 };
 
-/* do a synchronous decrypt operation */
-int do_decrypt(char *alg_name,
-	       void *key_ptr, unsigned int key_len,
-	       void *iv_ptr, void *src_ptr, void *dst_ptr,
-	       unsigned int block_len)
-{
-	struct scatterlist sg_in[1], sg_out[1];
-	struct crypto_blkcipher *tfm =
-	    crypto_alloc_blkcipher(alg_name, 0, CRYPTO_ALG_ASYNC);
-	struct blkcipher_desc desc = {.tfm = tfm, .flags = 0 };
-	int ret = 0;
-	void *iv;
-	int ivsize;
-
-	flow_log("%s() name:%s block_len:%u\n", __func__, alg_name, block_len);
-
-	if (IS_ERR(tfm))
-		return PTR_ERR(tfm);
-
-	crypto_blkcipher_setkey((void *)tfm, key_ptr, key_len);
-
-	sg_init_table(sg_in, 1);
-	sg_set_buf(sg_in, src_ptr, block_len);
-
-	sg_init_table(sg_out, 1);
-	sg_set_buf(sg_out, dst_ptr, block_len);
-
-	iv = crypto_blkcipher_crt(tfm)->iv;
-	ivsize = crypto_blkcipher_ivsize(tfm);
-	memcpy(iv, iv_ptr, ivsize);
-
-	ret = crypto_blkcipher_decrypt(&desc, sg_out, sg_in, block_len);
-	crypto_free_blkcipher(tfm);
-
-	if (ret < 0)
-		pr_err("aes_decrypt failed %d\n", ret);
-
-	return ret;
-}
-
 /**
  * do_shash() - Do a synchronous hash operation in software
  * @name:       The name of the hash algorithm

drivers/crypto/bcm/util.h

@@ -95,12 +95,6 @@ u32 spu_msg_sg_add(struct scatterlist **to_sg,
 
 void add_to_ctr(u8 *ctr_pos, unsigned int increment);
 
-/* do a synchronous decrypt operation */
-int do_decrypt(char *alg_name,
-	       void *key_ptr, unsigned int key_len,
-	       void *iv_ptr, void *src_ptr, void *dst_ptr,
-	       unsigned int block_len);
-
 /* produce a message digest from data of length n bytes */
 int do_shash(unsigned char *name, unsigned char *result,
 	     const u8 *data1, unsigned int data1_len,