Author: royger
Date: Mon May 25 09:47:16 2015
New Revision: 283516
URL: https://svnweb.freebsd.org/changeset/base/283516
Log:
xen: make sure xenpv bus is the last to attach
This is needed so other buses have a chance of attaching a real ISA bus, if
none is found xenpv will attach it.
Sponsored by: Citrix Systems R&D
Modified:
head/sys/x86/xen/xenpv.c
Modified: head/sys/x86/xen/xenpv.c
==============================================================================
--- head/sys/x86/xen/xenpv.c Mon May 25 09:08:19 2015 (r283515)
+++ head/sys/x86/xen/xenpv.c Mon May 25 09:47:16 2015 (r283516)
@@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$");
#include <sys/pcpu.h>
#include <sys/rman.h>
#include <sys/smp.h>
+#include <sys/limits.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
@@ -72,7 +73,11 @@ xenpv_identify(driver_t *driver, device_
if (devclass_get_device(xenpv_devclass, 0))
return;
- if (BUS_ADD_CHILD(parent, 0, "xenpv", 0) == NULL)
+ /*
+ * The xenpv bus should be the last to attach in order
+ * to properly detect if an ISA bus has already been added.
+ */
+ if (BUS_ADD_CHILD(parent, UINT_MAX, "xenpv", 0) == NULL)
panic("Unable to attach xenpv bus.");
}
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