[PATCH] virtio-gpu: fix unmap the already mapped items

[Li Zhijian]

we go here either (!(*iov)[i].iov_base) or (len != l), so we need to consider
to unmap the 'i'th item as well when the 'i'th item is not nil

Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
---
 hw/display/virtio-gpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 5f0dd7c150..1f777e43ff 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -656,7 +656,7 @@ int virtio_gpu_create_mapping_iov(VirtIOGPU *g,
             qemu_log_mask(LOG_GUEST_ERROR, "%s: failed to map MMIO memory for"
                           " resource %d element %d\n",
                           __func__, ab->resource_id, i);
-            virtio_gpu_cleanup_mapping_iov(g, *iov, i);
+            virtio_gpu_cleanup_mapping_iov(g, *iov, i + !!(*iov)[i].iov_base);
             g_free(ents);
             *iov = NULL;
             if (addr) {
-- 
2.17.1