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From:   Chen Zhongjin <chenzhongjin@huawei.com>
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Subject: [PATCH v5 28/33] arm64: sleep: Properly set frame pointer before call
Date:   Wed, 22 Jun 2022 23:49:15 +0800
Message-ID: <20220622154920.95075-29-chenzhongjin@huawei.com>
In-Reply-To: <20220622154920.95075-1-chenzhongjin@huawei.com>
References: <20220622154920.95075-1-chenzhongjin@huawei.com>
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In __cpu_suspend_enter, the FP and LR are properly saved on the stack to
form a stack frame, but the frame pointer is not set afterwards.

Have the frame pointer point to the new frame.

Signed-off-by: Julien Thierry <jthierry@redhat.com>
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
---
 arch/arm64/kernel/sleep.S | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kernel/sleep.S b/arch/arm64/kernel/sleep.S
index 799ec01b0649..7fd276f3c532 100644
--- a/arch/arm64/kernel/sleep.S
+++ b/arch/arm64/kernel/sleep.S
@@ -92,6 +92,7 @@ SYM_FUNC_START(__cpu_suspend_enter)
 	str	x0, [x1]
 	add	x0, x0, #SLEEP_STACK_DATA_SYSTEM_REGS
 	stp	x29, lr, [sp, #-16]!
+	mov	x29, sp
 	bl	cpu_do_suspend
 	ldp	x29, lr, [sp], #16
 	mov	x0, #1
-- 
2.17.1