[PATCH v4 14/30] KVM: arm64: Change kvm_handle_mmio_return() return polarity

[Fuad Tabba <tabba@google.com>]

Most exit handlers return <= 0 to indicate that the host needs to
handle the exit. Make kvm_handle_mmio_return() consistent with
the exit handlers in handle_exit(). This makes the code easier to
reason about, and makes it easier to add other handlers in future
patches.

No functional change intended.

Signed-off-by: Fuad Tabba <tabba@google.com>
---
 arch/arm64/kvm/arm.c  | 2 +-
 arch/arm64/kvm/mmio.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index c93ac8a77c27..e9eab8f2c6db 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1047,7 +1047,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
 
 	if (run->exit_reason == KVM_EXIT_MMIO) {
 		ret = kvm_handle_mmio_return(vcpu);
-		if (ret)
+		if (ret <= 0)
 			return ret;
 	}
 
diff --git a/arch/arm64/kvm/mmio.c b/arch/arm64/kvm/mmio.c
index 200c8019a82a..5e1ffb0d5363 100644
--- a/arch/arm64/kvm/mmio.c
+++ b/arch/arm64/kvm/mmio.c
@@ -86,7 +86,7 @@ int kvm_handle_mmio_return(struct kvm_vcpu *vcpu)
 
 	/* Detect an already handled MMIO return */
 	if (unlikely(!vcpu->mmio_needed))
-		return 0;
+		return 1;
 
 	vcpu->mmio_needed = 0;
 
@@ -117,7 +117,7 @@ int kvm_handle_mmio_return(struct kvm_vcpu *vcpu)
 	 */
 	kvm_incr_pc(vcpu);
 
-	return 0;
+	return 1;
 }
 
 int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa)
-- 
2.44.0.769.g3c40516874-goog