From: Christoph Hellwig <hch@lst.de>
Date: Mon, 15 Apr 2019 09:14:41 +0000 (+0200)
Subject: riscv: print the unexpected interrupt cause
X-Git-Tag: v5.4.17~3514^2~20
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=bed1378706637c0dd09c055480767dfcf6abe7db;p=people%2Faperard%2Flinux.git

riscv: print the unexpected interrupt cause

This has been helpful when debugging my pending nommu port.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Nick Kossifidis <mick@ics.forth.gr>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
---

diff --git a/arch/riscv/kernel/irq.c b/arch/riscv/kernel/irq.c
index 48e6b7db83a1d..c738132eecf82 100644
--- a/arch/riscv/kernel/irq.c
+++ b/arch/riscv/kernel/irq.c
@@ -54,7 +54,8 @@ asmlinkage void __irq_entry do_IRQ(struct pt_regs *regs)
 		handle_arch_irq(regs);
 		break;
 	default:
-		panic("unexpected interrupt cause");
+		pr_alert("unexpected interrupt cause 0x%lx", regs->scause);
+		BUG();
 	}
 	irq_exit();