[PATCH 08/46] KVM: Fix apic_mmio_write return for unaligned write

[Avi Kivity]

From: Sheng Yang <sheng@xxxxxxxxxxxxxxx>

Some in-famous OS do unaligned writing for APIC MMIO, and the return value
has been missed in recent change, then the OS hangs.

Signed-off-by: Sheng Yang <sheng@xxxxxxxxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
 arch/x86/kvm/lapic.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index dc6bec2..31f1d1c 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -828,7 +828,7 @@ static int apic_mmio_write(struct kvm_io_device *this,
 	if (len != 4 || (offset & 0xf)) {
 		/* Don't shout loud, $infamous_os would cause only noise. */
 		apic_debug("apic write: bad size=%d %lx\n", len, (long)address);
-		return;
+		return 0;
 	}
 
 	val = *(u32*)data;
-- 
1.6.4.1

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