diff --git a/arch/m32r/kernel/ptrace.c b/arch/m32r/kernel/ptrace.c
index 4c03361537aa6b49f3e2ba144afd667cd6b75307..51f5e9aa49016fdce8112eb72083c0b167f21df8 100644
--- a/arch/m32r/kernel/ptrace.c
+++ b/arch/m32r/kernel/ptrace.c
@@ -591,17 +591,16 @@ void user_enable_single_step(struct task_struct *child)
 
 	if (access_process_vm(child, pc&~3, &insn, sizeof(insn), 0)
 	    != sizeof(insn))
-		return -EIO;
+		return;
 
 	compute_next_pc(insn, pc, &next_pc, child);
 	if (next_pc & 0x80000000)
-		return -EIO;
+		return;
 
 	if (embed_debug_trap(child, next_pc))
-		return -EIO;
+		return;
 
 	invalidate_cache();
-	return 0;
 }
 
 void user_disable_single_step(struct task_struct *child)