crypto: ccree - use devm_k[mz]alloc() for AEAD data

As the lifetime of the AEAD data matches the lifetime of the driver,
AEAD data can be allocated using the managed allocators.
While at it, simplify cc_aead_free() by removing an unneeded cast, and
an unneeded check (aead_handle is always valid here).
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/ccree/cc_aead.c

@@ -2615,7 +2615,7 @@ static struct cc_crypto_alg *cc_create_aead_alg(struct cc_alg_template *tmpl,
 	struct cc_crypto_alg *t_alg;
 	struct aead_alg *alg;
 
-	t_alg = kzalloc(sizeof(*t_alg), GFP_KERNEL);
+	t_alg = devm_kzalloc(dev, sizeof(*t_alg), GFP_KERNEL);
 	if (!t_alg)
 		return ERR_PTR(-ENOMEM);
 
@@ -2645,19 +2645,12 @@ static struct cc_crypto_alg *cc_create_aead_alg(struct cc_alg_template *tmpl,
 int cc_aead_free(struct cc_drvdata *drvdata)
 {
 	struct cc_crypto_alg *t_alg, *n;
-	struct cc_aead_handle *aead_handle =
-		(struct cc_aead_handle *)drvdata->aead_handle;
+	struct cc_aead_handle *aead_handle = drvdata->aead_handle;
 
-	if (aead_handle) {
 	/* Remove registered algs */
-		list_for_each_entry_safe(t_alg, n, &aead_handle->aead_list,
-					 entry) {
+	list_for_each_entry_safe(t_alg, n, &aead_handle->aead_list, entry) {
 		crypto_unregister_aead(&t_alg->aead_alg);
 		list_del(&t_alg->entry);
-			kfree(t_alg);
-		}
-		kfree(aead_handle);
-		drvdata->aead_handle = NULL;
 	}
 
 	return 0;
@@ -2671,7 +2664,7 @@ int cc_aead_alloc(struct cc_drvdata *drvdata)
 	int alg;
 	struct device *dev = drvdata_to_dev(drvdata);
 
-	aead_handle = kmalloc(sizeof(*aead_handle), GFP_KERNEL);
+	aead_handle = devm_kmalloc(dev, sizeof(*aead_handle), GFP_KERNEL);
 	if (!aead_handle) {
 		rc = -ENOMEM;
 		goto fail0;
@@ -2706,18 +2699,16 @@ int cc_aead_alloc(struct cc_drvdata *drvdata)
 		if (rc) {
 			dev_err(dev, "%s alg registration failed\n",
 				t_alg->aead_alg.base.cra_driver_name);
-			goto fail2;
-		} else {
+			goto fail1;
+		}
+
 		list_add_tail(&t_alg->entry, &aead_handle->aead_list);
 		dev_dbg(dev, "Registered %s\n",
 			t_alg->aead_alg.base.cra_driver_name);
 	}
-	}
 
 	return 0;
 
-fail2:
-	kfree(t_alg);
 fail1:
 	cc_aead_free(drvdata);
 fail0:

drivers/crypto/ccree/cc_cipher.c

@@ -1705,12 +1705,12 @@ int cc_cipher_alloc(struct cc_drvdata *drvdata)
 				t_alg->skcipher_alg.base.cra_driver_name);
 			kfree(t_alg);
 			goto fail0;
-		} else {
+		}
+
 		list_add_tail(&t_alg->entry, &drvdata->alg_list);
 		dev_dbg(dev, "Registered %s\n",
 			t_alg->skcipher_alg.base.cra_driver_name);
 	}
-	}
 	return 0;
 
 fail0:

drivers/crypto/ccree/cc_hash.c

@@ -2024,10 +2024,9 @@ int cc_hash_alloc(struct cc_drvdata *drvdata)
 					driver_hash[alg].driver_name);
 				kfree(t_alg);
 				goto fail;
-			} else {
-				list_add_tail(&t_alg->entry,
-					      &hash_handle->hash_list);
 			}
+
+			list_add_tail(&t_alg->entry, &hash_handle->hash_list);
 		}
 		if (hw_mode == DRV_CIPHER_XCBC_MAC ||
 		    hw_mode == DRV_CIPHER_CMAC)
@@ -2049,9 +2048,9 @@ int cc_hash_alloc(struct cc_drvdata *drvdata)
 				driver_hash[alg].driver_name);
 			kfree(t_alg);
 			goto fail;
-		} else {
-			list_add_tail(&t_alg->entry, &hash_handle->hash_list);
 		}
+
+		list_add_tail(&t_alg->entry, &hash_handle->hash_list);
 	}
 
 	return 0;