[PATCH] KVM: arm64: Fix the return value of smp_call_function_single()

[Yejune Deng]

In smp_call_function_single(), the 3rd parameter isn't the return value
and it's always positive. But it may return a negative value. So the
'ret' is should be the return value of the smp_call_function_single().

In check_kvm_target_cpu(), 'phys_target' is more readable than 'ret'.

Signed-off-by: Yejune Deng <yejune.d...@gmail.com>
---
 arch/arm64/kvm/arm.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 04c44853b103..5fa5c04106de 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1815,9 +1815,9 @@ static int init_hyp_mode(void)
        return err;
 }
 
-static void check_kvm_target_cpu(void *ret)
+static void check_kvm_target_cpu(void *phys_target)
 {
-       *(int *)ret = kvm_target_cpu();
+       *(int *)phys_target = kvm_target_cpu();
 }
 
 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr)
@@ -1879,7 +1879,7 @@ void kvm_arch_irq_bypass_start(struct irq_bypass_consumer 
*cons)
 int kvm_arch_init(void *opaque)
 {
        int err;
-       int ret, cpu;
+       int ret, cpu, phys_target;
        bool in_hyp_mode;
 
        if (!is_hyp_mode_available()) {
@@ -1900,7 +1900,7 @@ int kvm_arch_init(void *opaque)
                         "Only trusted guests should be used on this 
system.\n");
 
        for_each_online_cpu(cpu) {
-               smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1);
+               ret = smp_call_function_single(cpu, check_kvm_target_cpu, 
&phys_target, 1);
                if (ret < 0) {
                        kvm_err("Error, CPU %d not supported!\n", cpu);
                        return -ENODEV;
-- 
2.29.0