From 5b0a4f9e13343ce3e05aa4e019cd9492b2f9636a Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 21 Nov 2022 21:59:00 +0800
Subject: [PATCH] nios2: restarts apply only to the first sigframe we build...

stable inclusion
from stable-v5.10.138
commit 600ff4b13b0ecb94e7ba21531c7386074cca56ea
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I60QFD

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=600ff4b13b0ecb94e7ba21531c7386074cca56ea

--------------------------------

commit 411a76b7219555c55867466c82d70ce928d6c9e1 upstream.

Fixes: b53e906d255d ("nios2: Signal handling support")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: Wei Li <liwei391@huawei.com>
---
 arch/nios2/kernel/signal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/nios2/kernel/signal.c b/arch/nios2/kernel/signal.c
index d5000d494699..916180e4a997 100644
--- a/arch/nios2/kernel/signal.c
+++ b/arch/nios2/kernel/signal.c
@@ -264,6 +264,7 @@ static int do_signal(struct pt_regs *regs)
 			regs->ea = restart_addr;
 			break;
 		}
+		regs->orig_r2 = -1;
 	}
 
 	if (get_signal(&ksig)) {
-- 
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