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-rw-r--r--drivers/hv/vmbus_drv.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index f123bca77808..328e4c3808e0 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1063,12 +1063,28 @@ static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx)
new_res->start = start;
new_res->end = end;
+ /*
+ * Stick ranges from higher in address space at the front of the list.
+ * If two ranges are adjacent, merge them.
+ */
do {
if (!*old_res) {
*old_res = new_res;
break;
}
+ if (((*old_res)->end + 1) == new_res->start) {
+ (*old_res)->end = new_res->end;
+ kfree(new_res);
+ break;
+ }
+
+ if ((*old_res)->start == new_res->end + 1) {
+ (*old_res)->start = new_res->start;
+ kfree(new_res);
+ break;
+ }
+
if ((*old_res)->end < new_res->start) {
new_res->sibling = *old_res;
if (prev_res)