Q: Given the following code slice:
```
1 void kgd2kfd_suspend(struct kfd_dev *kfd, bool run_pm)
2 {
3 	struct kfd_node *node;
4 	int i;
5 	int count;
6 
7 	if (!kfd->init_complete)
8 		return;
9 
10 	/* for runtime suspend, skip locking kfd */
11 	if (!run_pm) {
12 		mutex_lock(&kfd_processes_mutex);
13 		count = ++kfd_locked;
14 		mutex_unlock(&kfd_processes_mutex);
15 
16 		/* For first KFD device suspend all the KFD processes */
17 		if (count == 1)
18 			kfd_suspend_all_processes();
19 	}
20 
21 	for (i = 0; i < kfd->num_nodes; i++) {
22 		node = kfd->nodes[i];
23 		node->dqm->ops.stop(node->dqm);
24 	}
25 }
```
which has a vulnerability among CWE-416,CWE-476 and among lines:
```
12 		mutex_lock(&kfd_processes_mutex);
14 		mutex_unlock(&kfd_processes_mutex);
```
Please generate five possible patches for the vulnerability.