On 2019年08月16日 21:39, Dan Carpenter wrote:
On Fri, Aug 16, 2019 at 10:25:52AM +0800, Zhao Yakui wrote:
+int acrn_ioreq_create_client(unsigned short vmid,
+ ioreq_handler_t handler,
+ void *client_priv,
+ char *name)
+{
+ struct acrn_vm *vm;
+ struct ioreq_client *client;
+ int client_id;
+
+ might_sleep();
+
+ vm = find_get_vm(vmid);
+ if (unlikely(!vm || !vm->req_buf)) {
+ pr_err("acrn-ioreq: failed to find vm from vmid %d\n", vmid);
+ put_vm(vm);
+ return -EINVAL;
+ }
+
+ client_id = alloc_client();
+ if (unlikely(client_id < 0)) {
+ pr_err("acrn-ioreq: vm[%d] failed to alloc ioreq client\n",
+ vmid);
+ put_vm(vm);
+ return -EINVAL;
+ }
+
+ client = acrn_ioreq_get_client(client_id);
+ if (unlikely(!client)) {
+ pr_err("failed to get the client.\n");
+ put_vm(vm);
+ return -EINVAL;
Do we need to clean up the alloc_client() allocation?
Thanks for the review.
The function of acrn_iocreq_get_client is used to return the client for
the given client_id. (The ref_count of client is also added). If it is
NULL, it indicates that it is already released in another place.
In the function of acrn_ioreq_create_client, we don't need to clean up
the alloc_client as it always exists in course of creating_client.
regards,
dan carpenter
+ }
+
+ if (handler) {
+ client->handler = handler;
+ client->acrn_create_kthread = true;
+ }
+
+ client->ref_vm = vm;
+ client->vmid = vmid;
+ client->client_priv = client_priv;
+ if (name)
+ strncpy(client->name, name, sizeof(client->name) - 1);
+ rwlock_init(&client->range_lock);
+ INIT_LIST_HEAD(&client->range_list);
+ init_waitqueue_head(&client->wq);
+
+ /* When it is added to ioreq_client_list, the refcnt is increased */
+ spin_lock_bh(&vm->ioreq_client_lock);
+ list_add(&client->list, &vm->ioreq_client_list);
+ spin_unlock_bh(&vm->ioreq_client_lock);
+
+ pr_info("acrn-ioreq: created ioreq client %d\n", client_id);
+
+ return client_id;
+}
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