Bluetooth: Refactor SMP (de)initialization into separate functions

As preparation for converting SMP to use the l2cap_chan infrastructure
refactor the (de)initialization into separate functions.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 34 insertions, 12 deletions

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 4a1ec259099e..1f691c50abbc 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1764,6 +1764,34 @@ static void hci_init4_req(struct hci_request *req, unsigned long opt)
         }
 }
 
+static int hci_register_smp(struct hci_dev *hdev)
+{
+        int err;
+
+        BT_DBG("%s", hdev->name);
+
+        hdev->tfm_aes = crypto_alloc_blkcipher("ecb(aes)", 0,
+                                               CRYPTO_ALG_ASYNC);
+        if (IS_ERR(hdev->tfm_aes)) {
+                BT_ERR("Unable to create crypto context");
+                err = PTR_ERR(hdev->tfm_aes);
+                hdev->tfm_aes = NULL;
+                return err;
+        }
+
+        return 0;
+}
+
+static void hci_unregister_smp(struct hci_dev *hdev)
+{
+        BT_DBG("%s", hdev->name);
+
+        if (hdev->tfm_aes) {
+                crypto_free_blkcipher(hdev->tfm_aes);
+                hdev->tfm_aes = NULL;
+        }
+}
+
 static int __hci_init(struct hci_dev *hdev)
 {
         int err;
@@ -4099,18 +4127,13 @@ int hci_register_dev(struct hci_dev *hdev)
 
         dev_set_name(&hdev->dev, "%s", hdev->name);
 
-        hdev->tfm_aes = crypto_alloc_blkcipher("ecb(aes)", 0,
-                                               CRYPTO_ALG_ASYNC);
-        if (IS_ERR(hdev->tfm_aes)) {
-                BT_ERR("Unable to create crypto context");
-                error = PTR_ERR(hdev->tfm_aes);
-                hdev->tfm_aes = NULL;
+        error = hci_register_smp(hdev);
+        if (error)
                 goto err_wqueue;
-        }
 
         error = device_add(&hdev->dev);
         if (error < 0)
-                goto err_tfm;
+                goto err_smp;
 
         hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
                                     RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
@@ -4152,8 +4175,8 @@ int hci_register_dev(struct hci_dev *hdev)
 
         return id;
 
-err_tfm:
-        crypto_free_blkcipher(hdev->tfm_aes);
+err_smp:
+        hci_unregister_smp(hdev);
 err_wqueue:
         destroy_workqueue(hdev->workqueue);
         destroy_workqueue(hdev->req_workqueue);
@@ -4205,8 +4228,7 @@ void hci_unregister_dev(struct hci_dev *hdev)
                 rfkill_destroy(hdev->rfkill);
         }
 
-        if (hdev->tfm_aes)
-                crypto_free_blkcipher(hdev->tfm_aes);
+        hci_unregister_smp(hdev);
 
         device_del(&hdev->dev);