csky/smp: Fixup boot failed when CONFIG_SMP

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@linux.alibaba.com>

diff --git a/arch/csky/kernel/smp.c b/arch/csky/kernel/smp.c
index b753d38..0bb0954 100644 (file)
--- 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);