bus/vmbus: stop mapping if empty resource found

If vmbus is run on older kernel (without all the uio mappings),
then the bus driver should stop when it hits the missing mappings
rather than recording the empty values.

Fixes: 831dba47bd36 ("bus/vmbus: add Hyper-V virtual bus support")
Cc: stable@dpdk.org
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>

diff --git a/drivers/bus/vmbus/vmbus_common_uio.c b/drivers/bus/vmbus/vmbus_common_uio.c
index 46e233d..a6545b7 100644 (file)
--- a/drivers/bus/vmbus/vmbus_common_uio.c
+++ b/drivers/bus/vmbus/vmbus_common_uio.c
@@ -98,9 +98,9 @@ vmbus_uio_map_primary(struct rte_vmbus_device *dev)
 
        /* Map the resources */
        for (i = 0; i < VMBUS_MAX_RESOURCE; i++) {
-               /* skip empty BAR */
+               /* stop at empty BAR */
                if (dev->resource[i].len == 0)
-                       continue;
+                       break;
 
                ret = vmbus_uio_map_resource_by_index(dev, i, uio_res, 0);
                if (ret)