D56497.id177346.diff
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D56497.id177346.diff
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	diff --git a/sys/dev/virtio/p9fs/virtio_p9fs.c b/sys/dev/virtio/p9fs/virtio_p9fs.c
	--- a/sys/dev/virtio/p9fs/virtio_p9fs.c
	+++ b/sys/dev/virtio/p9fs/virtio_p9fs.c
	@@ -464,16 +464,22 @@
	vt9p_modevent(module_t mod, int type, void *unused)
	{
	int error;
	+ static int loaded = 0;

	error = 0;

	switch (type) {
	case MOD_LOAD:
	- p9_init_zones();
	- p9_register_trans(&vt9p_trans);
	+ if (loaded++ == 0) {
	+ p9_init_zones();
	+ p9_register_trans(&vt9p_trans);
	+ }
	break;
	case MOD_UNLOAD:
	- p9_destroy_zones();
	+ if (--loaded == 0) {
	+ p9_unregister_trans(&vt9p_trans);
	+ p9_destroy_zones();
	+ }
	break;
	case MOD_SHUTDOWN:
	break;