Bluetooth: Use kzalloc instead of kmalloc/memset

Use kzalloc rather than kmalloc followed by memset with 0.

Generated by: scripts/coccinelle/api/alloc/kzalloc-simple.cocci
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

net/bluetooth/mgmt.c

@@ -902,12 +902,10 @@ static int read_ext_controller_info(struct sock *sk, struct hci_dev *hdev,
 	eir_len = eir_append_data(buff, eir_len, EIR_NAME_SHORT,
 				  hdev->short_name, name_len);
 
-	rp = kmalloc(sizeof(*rp) + eir_len, GFP_KERNEL);
+	rp = kzalloc(sizeof(*rp) + eir_len, GFP_KERNEL);
 	if (!rp)
 		return -ENOMEM;
 
-	memset(rp, 0, sizeof(*rp) + eir_len);
-
 	rp->eir_len = cpu_to_le16(eir_len);
 	memcpy(rp->eir, buff, eir_len);