From: Max Filippov <jcmvbkbc@gmail.com>
Date: Thu, 14 Nov 2019 23:05:40 +0000 (-0800)
Subject: xtensa: fix syscall_set_return_value
X-Git-Tag: v5.15~4978^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c2d9aa3b6e56de56c7f1ed9026ca6ec7cfbeef19;p=platform%2Fkernel%2Flinux-starfive.git

xtensa: fix syscall_set_return_value

syscall return value is in the register a2, not a0.

Cc: stable@vger.kernel.org # v5.0+
Fixes: 9f24f3c1067c ("xtensa: implement tracehook functions and enable HAVE_ARCH_TRACEHOOK")
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---

diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
index 359ab40..c90fb94 100644
--- a/arch/xtensa/include/asm/syscall.h
+++ b/arch/xtensa/include/asm/syscall.h
@@ -51,7 +51,7 @@ static inline void syscall_set_return_value(struct task_struct *task,
 					    struct pt_regs *regs,
 					    int error, long val)
 {
-	regs->areg[0] = (long) error ? error : val;
+	regs->areg[2] = (long) error ? error : val;
 }
 
 #define SYSCALL_MAX_ARGS 6