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KVM: PPC: NULL return of kvmppc_mmu_hpte_cache_next should be handled 

NULL return of kvmppc_mmu_hpte_cache_next should be handled

Signed-off-by: Zhouyi Zhou <yizhouzhou@ict.ac.cn>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Zhouyi Zhou 2013-12-02 18:21:58 +08:00 committed by Alexander Graf
parent 9bd880a2c8
commit 47d45d9f53
1 changed files with 5 additions and 0 deletions
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5
arch/powerpc/kvm/book3s_32_mmu_host.c
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@ -243,6 +243,11 @@ next_pteg:
/* Now tell our Shadow PTE code about the new page */ /* Now tell our Shadow PTE code about the new page */
pte = kvmppc_mmu_hpte_cache_next(vcpu); pte = kvmppc_mmu_hpte_cache_next(vcpu);
if (!pte) {
kvm_release_pfn_clean(hpaddr >> PAGE_SHIFT);
r = -EAGAIN;
goto out;
}
dprintk_mmu("KVM: %c%c Map 0x%llx: [%lx] 0x%llx (0x%llx) -> %lx\n", dprintk_mmu("KVM: %c%c Map 0x%llx: [%lx] 0x%llx (0x%llx) -> %lx\n",
orig_pte->may_write ? 'w' : '-', orig_pte->may_write ? 'w' : '-',