linux-kernel - [PATCH 5.4 052/168] csky/smp: Fixup boot failed when CONFIG

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Date:   Tue, 10 Mar 2020 13:38:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Guo Ren <guoren@...ux.alibaba.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 052/168] csky/smp: Fixup boot failed when CONFIG_SMP

From: Guo Ren <guoren@...ux.alibaba.com>

[ Upstream commit c9492737b25ca32679ba3163609d938c9abfd508 ]

If we use a non-ipi-support interrupt controller, it will cause panic here.
We should let cpu up and work with CONFIG_SMP, when we use a non-ipi intc.

Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/csky/kernel/smp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/csky/kernel/smp.c b/arch/csky/kernel/smp.c
index b753d382e4cef..0bb0954d55709 100644
--- a/arch/csky/kernel/smp.c
+++ b/arch/csky/kernel/smp.c
@@ -120,7 +120,7 @@ void __init setup_smp_ipi(void)
 	int rc;
 
 	if (ipi_irq == 0)
-		panic("%s IRQ mapping failed\n", __func__);
+		return;
 
 	rc = request_percpu_irq(ipi_irq, handle_ipi, "IPI Interrupt",
 				&ipi_dummy_dev);
-- 
2.20.1