xive: Link "xive" property to XiveEndSource::xrtr pointer

The END source object has both a pointer and a "xive" property pointing to
the router object. Confusing bugs could arise if these ever go out of sync.

Change the property definition so that it explicitely sets the pointer.
The property isn't optional : not being able to set the link is a bug
and QEMU should rather abort than exit in this case.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <157383333784.165747.5298512574054268786.stgit@bahia.lan>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 3 insertions, 10 deletions

diff --git a/hw/intc/xive.c b/hw/intc/xive.c
index 2eac15e..3d472e2 100644
--- a/hw/intc/xive.c
+++ b/hw/intc/xive.c
@@ -1814,17 +1814,8 @@ static const MemoryRegionOps xive_end_source_ops = {
 static void xive_end_source_realize(DeviceState *dev, Error **errp)
 {
     XiveENDSource *xsrc = XIVE_END_SOURCE(dev);
-    Object *obj;
-    Error *local_err = NULL;
-
-    obj = object_property_get_link(OBJECT(dev), "xive", &local_err);
-    if (!obj) {
-        error_propagate(errp, local_err);
-        error_prepend(errp, "required link 'xive' not found: ");
-        return;
-    }
 
-    xsrc->xrtr = XIVE_ROUTER(obj);
+    assert(xsrc->xrtr);
 
     if (!xsrc->nr_ends) {
         error_setg(errp, "Number of interrupt needs to be greater than 0");
@@ -1850,6 +1841,8 @@ static Property xive_end_source_properties[] = {
     DEFINE_PROP_UINT8("block-id", XiveENDSource, block_id, 0),
     DEFINE_PROP_UINT32("nr-ends", XiveENDSource, nr_ends, 0),
     DEFINE_PROP_UINT32("shift", XiveENDSource, esb_shift, XIVE_ESB_64K),
+    DEFINE_PROP_LINK("xive", XiveENDSource, xrtr, TYPE_XIVE_ROUTER,
+                     XiveRouter *),
     DEFINE_PROP_END_OF_LIST(),
 };