diff -drupN a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
--- a/arch/mips/kernel/smp.c	2017-10-21 18:09:07.000000000 +0300
+++ b/arch/mips/kernel/smp.c	2022-06-09 05:02:27.000000000 +0300
@@ -247,6 +247,8 @@ void smp_prepare_boot_cpu(void)
 
 int __cpu_up(unsigned int cpu, struct task_struct *tidle)
 {
+	unsigned int timeout = 0xff;
+
 	mp_ops->boot_secondary(cpu, tidle);
 
 	/*
@@ -256,6 +258,10 @@ int __cpu_up(unsigned int cpu, struct ta
 		udelay(100);
 		schedule();
 	}
+	while (!(cpumask_test_cpu(cpu, cpu_online_mask) || !timeout--)) {
+		udelay(100);
+		schedule();
+	}
 
 	synchronise_count_master(cpu);
 	return 0;