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xen: make sure xenpv bus is the last to attach

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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
This commit is contained in:
Roger Pau Monné 2015-05-25 09:47:16 +00:00
parent e61d4e626e
commit 02761cf314
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=283516
1 changed files with 6 additions and 1 deletions
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7
sys/x86/xen/xenpv.c
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@ -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_t parent)
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.");
}