From: Christoph Hellwig <hch@lst.de>
Date: Mon, 15 Apr 2019 09:14:36 +0000 (+0200)
Subject: riscv: clear all pending interrupts when booting
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=df16c40cbfb43fbd6d5d879585b268b131fa95eb;p=linux.git

riscv: clear all pending interrupts when booting

Just in case an old interrupt is pending make sure we clear everything
asserted before this kernel started.  Based on similar M-mode code in
opensbi.

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

diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S
index fe884cd69abd8..9e3840d84d3e4 100644
--- a/arch/riscv/kernel/head.S
+++ b/arch/riscv/kernel/head.S
@@ -22,8 +22,9 @@
 
 __INIT
 ENTRY(_start)
-	/* Mask all interrupts */
+	/* Mask and clear all interrupts */
 	csrw sie, zero
+	csrw sip, zero
 
 	/* Load the global pointer */
 .option push