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-rw-r--r--drivers/net/hyperv/netvsc_drv.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 2d3cdb026a99..bc05c895d958 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -859,15 +859,22 @@ static int netvsc_change_mtu(struct net_device *ndev, int mtu)
if (ret)
goto out;
+ memset(&device_info, 0, sizeof(device_info));
+ device_info.ring_size = ring_size;
+ device_info.num_chn = nvdev->num_chn;
+ device_info.max_num_vrss_chns = nvdev->num_chn;
+
ndevctx->start_remove = true;
rndis_filter_device_remove(hdev, nvdev);
+ /* 'nvdev' has been freed in rndis_filter_device_remove() ->
+ * netvsc_device_remove () -> free_netvsc_device().
+ * We mustn't access it before it's re-created in
+ * rndis_filter_device_add() -> netvsc_device_add().
+ */
+
ndev->mtu = mtu;
- memset(&device_info, 0, sizeof(device_info));
- device_info.ring_size = ring_size;
- device_info.num_chn = nvdev->num_chn;
- device_info.max_num_vrss_chns = nvdev->num_chn;
rndis_filter_device_add(hdev, &device_info);
out: