From: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com>
Date: Thu, 26 Jun 2014 19:11:40 +0000 (-0700)
Subject: MIPS: KVM: Remove dead code of TLB index error in kvm_mips_emul_tlbwr()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ab76228a48d434d67cf72f8753307db104e81cc6;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

MIPS: KVM: Remove dead code of TLB index error in kvm_mips_emul_tlbwr()

It's impossible to fall into the error handling of the TLB index after
being masked by (KVM_MIPS_GUEST_TLB_SIZE - 1). Remove the dead code.

Reported-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/arch/mips/kvm/emulate.c b/arch/mips/kvm/emulate.c
index 1a6068892e66..fb3e8dfd1ff6 100644
--- a/arch/mips/kvm/emulate.c
+++ b/arch/mips/kvm/emulate.c
@@ -846,11 +846,6 @@ enum emulation_result kvm_mips_emul_tlbwr(struct kvm_vcpu *vcpu)
 	get_random_bytes(&index, sizeof(index));
 	index &= (KVM_MIPS_GUEST_TLB_SIZE - 1);
 
-	if (index < 0 || index >= KVM_MIPS_GUEST_TLB_SIZE) {
-		kvm_err("%s: illegal index: %d\n", __func__, index);
-		return EMULATE_FAIL;
-	}
-
 	tlb = &vcpu->arch.guest_tlb[index];
 
 	/*