1 files changed, 3 insertions, 30 deletions

diff --git a/arch/riscv/kernel/irq.c b/arch/riscv/kernel/irq.c
index bb0bfcd537e7..eb8777642ce6 100644
--- a/arch/riscv/kernel/irq.c
+++ b/arch/riscv/kernel/irq.c
@@ -7,7 +7,6 @@
 
 #include <linux/interrupt.h>
 #include <linux/irqchip.h>
-#include <linux/irqdomain.h>
 #include <linux/seq_file.h>
 #include <asm/smp.h>
 
@@ -19,39 +18,13 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 
 asmlinkage __visible void __irq_entry do_IRQ(struct pt_regs *regs)
 {
-	struct pt_regs *old_regs;
-
-	switch (regs->cause & ~CAUSE_IRQ_FLAG) {
-	case RV_IRQ_TIMER:
-		old_regs = set_irq_regs(regs);
-		irq_enter();
-		riscv_timer_interrupt();
-		irq_exit();
-		set_irq_regs(old_regs);
-		break;
-#ifdef CONFIG_SMP
-	case RV_IRQ_SOFT:
-		/*
-		 * We only use software interrupts to pass IPIs, so if a non-SMP
-		 * system gets one, then we don't know what to do.
-		 */
-		handle_IPI(regs);
-		break;
-#endif
-	case RV_IRQ_EXT:
-		old_regs = set_irq_regs(regs);
-		irq_enter();
+	if (handle_arch_irq)
 		handle_arch_irq(regs);
-		irq_exit();
-		set_irq_regs(old_regs);
-		break;
-	default:
-		pr_alert("unexpected interrupt cause 0x%lx", regs->cause);
-		BUG();
-	}
 }
 
 void __init init_IRQ(void)
 {
 	irqchip_init();
+	if (!handle_arch_irq)
+		panic("No interrupt controller found.");
 }