From df410675e5fad55e056fb505cba3a62cac13c411 Mon Sep 17 00:00:00 2001
From: Alex Williamson <alex.williamson@redhat.com>
Date: Mon, 25 Jun 2012 09:40:39 -0600
Subject: [PATCH] kvm: Don't abort on kvm_irqchip_add_msi_route()

Anyone using these functions has to be prepared that irqchip
support may not be present.  It shouldn't be up to the core
code to determine whether this is a fatal error.  Currently
code written as:

virq = kvm_irqchip_add_msi_route(...)
if (virq < 0) {
    <slow path>
} else {
    <fast path>
}

works on x86 with and without kvm irqchip enabled, works
without kvm support compiled in, but aborts() on !x86 with
kvm support.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
 kvm-all.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kvm-all.c b/kvm-all.c
index f8e432841f..a0c33b38de 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1142,7 +1142,7 @@ int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
 
 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
 {
-    abort();
+    return -ENOSYS;
 }
 
 static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign)
-- 
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