From: Sheng Yang <sheng@linux.intel.com>
Date: Mon, 6 Jul 2009 03:05:39 +0000 (+0800)
Subject: KVM: Fix apic_mmio_write return for unaligned write
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=756975bbfd185169aac19f227d65a8d738a5f5f8;p=deliverable%2Flinux.git

KVM: Fix apic_mmio_write return for unaligned write

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@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 683345a121b7..6c8460308548 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -834,7 +834,7 @@ 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;