Based on the provided code and the identified vulnerability (CWE-476: NULL Pointer Dereference) on line 9, here are five possible patches to address the issue:

Patch 1:
```c
8 	raw_spin_lock_irqsave(&devtree_lock, flags);
9 	if (np)
10 		pp = __of_find_property(np, name, lenp);
11 	else
12 		pp = NULL;
13 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
```

Patch 2:
```c
8 	raw_spin_lock_irqsave(&devtree_lock, flags);
9 	pp = np ? __of_find_property(np, name, lenp) : NULL;
10 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
```

Patch 3:
```c
7 
8 	if (!np)
9 		return NULL;
10 	raw_spin_lock_irqsave(&devtree_lock, flags);
11 	pp = __of_find_property(np, name, lenp);
12 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
```

Patch 4:
```c
8 	raw_spin_lock_irqsave(&devtree_lock, flags);
9 	pp = (np != NULL) ? __of_find_property(np, name, lenp) : NULL;
10 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
```

Patch 5:
```c
7 
8 	if (np == NULL) {
9 		pr_err("%s: Invalid device node\n", __func__);
10 		return NULL;
11 	}
12 	raw_spin_lock_irqsave(&devtree_lock, flags);
13 	pp = __of_find_property(np, name, lenp);
14 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
```

These patches add checks to ensure that the `np` pointer is not NULL before calling `__of_find_property`, preventing potential NULL pointer dereferences.