[PATCH kernel v2] KVM: PPC: Use arch_get_random_seed_long instead of powernv variant

[Alexey Kardashevskiy]

The powernv_get_random_long() does not work in nested KVM (which is
pseries) and produces a crash when accessing in_be64(rng->regs) in
powernv_get_random_long().

This replaces powernv_get_random_long with the ppc_md machine hook
wrapper.

Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
---

Changes:
v2:
* replaces [PATCH kernel] powerpc/powernv: Check if powernv_rng is initialized

---
 arch/powerpc/kvm/book3s_hv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index be0cde26f156..ecfd133e0ca8 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -1165,7 +1165,7 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
 		break;
 #endif
 	case H_RANDOM:
-		if (!powernv_get_random_long(&vcpu->arch.regs.gpr[4]))
+		if (!arch_get_random_seed_long(&vcpu->arch.regs.gpr[4]))
 			ret = H_HARDWARE;
 		break;
 	case H_RPT_INVALIDATE:
-- 
2.30.2