diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 3de25fb..4e61f74 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -199,19 +199,19 @@
 		return -E2BIG;
 
 	ee = READ_ONCE(array->ptrs[index]);
-	if (unlikely(!ee))
+	if (!ee)
 		return -ENOENT;
 
 	event = ee->event;
+	if (unlikely(event->attr.type != PERF_TYPE_HARDWARE &&
+		     event->attr.type != PERF_TYPE_RAW))
+		return -EINVAL;
+
 	/* make sure event is local and doesn't have pmu::count */
 	if (event->oncpu != smp_processor_id() ||
 	    event->pmu->count)
 		return -EINVAL;
 
-	if (unlikely(event->attr.type != PERF_TYPE_HARDWARE &&
-		     event->attr.type != PERF_TYPE_RAW))
-		return -EINVAL;
-
 	/*
 	 * we don't know if the function is run successfully by the
 	 * return value. It can be judged in other places, such as
@@ -251,7 +251,7 @@
 		return -E2BIG;
 
 	ee = READ_ONCE(array->ptrs[index]);
-	if (unlikely(!ee))
+	if (!ee)
 		return -ENOENT;
 
 	event = ee->event;
@@ -354,18 +354,12 @@
 static bool kprobe_prog_is_valid_access(int off, int size, enum bpf_access_type type,
 					enum bpf_reg_type *reg_type)
 {
-	/* check bounds */
 	if (off < 0 || off >= sizeof(struct pt_regs))
 		return false;
-
-	/* only read is allowed */
 	if (type != BPF_READ)
 		return false;
-
-	/* disallow misaligned access */
 	if (off % size != 0)
 		return false;
-
 	return true;
 }