D5097.id.diff
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	Index: head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c
	===================================================================
	--- head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c
	+++ head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c
	@@ -1524,13 +1524,12 @@
	storvsc_destroy_bounce_buffer(struct sglist *sgl)
	{
	struct hv_sgl_node *sgl_node = NULL;
	-
	- sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.in_use_sgl_list);
	- LIST_REMOVE(sgl_node, link);
	- if (NULL == sgl_node) {
	+ if (LIST_EMPTY(&g_hv_sgl_page_pool.in_use_sgl_list)) {
	printf("storvsc error: not enough in use sgl\n");
	return;
	}
	+ sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.in_use_sgl_list);
	+ LIST_REMOVE(sgl_node, link);
	sgl_node->sgl_data = sgl;
	LIST_INSERT_HEAD(&g_hv_sgl_page_pool.free_sgl_list, sgl_node, link);
	}
	@@ -1556,12 +1555,12 @@
	struct hv_sgl_node *sgl_node = NULL;

	/* get struct sglist from free_sgl_list */
	- sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.free_sgl_list);
	- LIST_REMOVE(sgl_node, link);
	- if (NULL == sgl_node) {
	+ if (LIST_EMPTY(&g_hv_sgl_page_pool.free_sgl_list)) {
	printf("storvsc error: not enough free sgl\n");
	return NULL;
	}
	+ sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.free_sgl_list);
	+ LIST_REMOVE(sgl_node, link);
	bounce_sgl = sgl_node->sgl_data;
	LIST_INSERT_HEAD(&g_hv_sgl_page_pool.in_use_sgl_list, sgl_node, link);