[PATCH v1 08/12] hw/xen/xen-hvm-common: skip ioreq creation on ioreq registration failure

[Vikram Garhwal]

From: Stefano Stabellini <stefano.stabell...@amd.com>

On ARM it is possible to have a functioning xenpv machine with only the
PV backends and no IOREQ server. If the IOREQ server creation fails continue
to the PV backends initialization.

Signed-off-by: Stefano Stabellini <stefano.stabell...@amd.com>
---
 hw/xen/xen-hvm-common.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/hw/xen/xen-hvm-common.c b/hw/xen/xen-hvm-common.c
index f848f9e625..7bccf595fc 100644
--- a/hw/xen/xen-hvm-common.c
+++ b/hw/xen/xen-hvm-common.c
@@ -777,7 +777,11 @@ void xen_register_ioreq(XenIOState *state, unsigned int 
max_cpus,
         goto err;
     }
 
-    xen_create_ioreq_server(xen_domid, &state->ioservid);
+    rc = xen_create_ioreq_server(xen_domid, &state->ioservid);
+    if (rc) {
+        DPRINTF("xen: failed to create ioreq server\n");
+        goto no_ioreq;
+    }
 
     state->exit.notify = xen_exit_notifier;
     qemu_add_exit_notifier(&state->exit);
@@ -842,6 +846,7 @@ void xen_register_ioreq(XenIOState *state, unsigned int 
max_cpus,
     QLIST_INIT(&state->dev_list);
     device_listener_register(&state->device_listener);
 
+no_ioreq:
     xen_bus_init();
 
     /* Initialize backend core & drivers */
-- 
2.17.0