[PATCH] KVM: PPC: Book3E: Unlock mmu_lock when setting caching atttribute

[Mihai Caraman]

The patch 08c9a188d0d0fc0f0c5e17d89a06bb59c493110f
  	kvm: powerpc: use caching attributes as per linux pte
do not handle properly the error case, letting mmu_lock locked. The lock
will further generate a RCU stall from kvmppc_e500_emul_tlbwe() caller.

In case of an error go to out label.

Signed-off-by: Mihai Caraman <mihai.caraman at freescale.com>
Cc: Bharat Bhushan <bharat.bhushan at freescale.com>
---
 arch/powerpc/kvm/e500_mmu_host.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c
index 0528fe5..54144c7 100644
--- a/arch/powerpc/kvm/e500_mmu_host.c
+++ b/arch/powerpc/kvm/e500_mmu_host.c
@@ -473,7 +473,8 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
 		if (printk_ratelimit())
 			pr_err("%s: pte not present: gfn %lx, pfn %lx\n",
 				__func__, (long)gfn, pfn);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 	kvmppc_e500_ref_setup(ref, gtlbe, pfn, wimg);
 
-- 
1.7.11.7