hyperv: NULL dereference on error

We try to call free_netvsc_device(net_device) when "net_device" is NULL.
It leads to an Oops.

Fixes: 420d09ada1f4 ('hyperv: Increase the buffer length for netvsc_channel_cb()')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 5b5644a2233cc0d3e1791349080909773de16346..977984bc238a1e0cc374c6ef5fd08f07546369d9 100644 (file)
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -1054,10 +1054,8 @@ int netvsc_device_add(struct hv_device *device, void *additional_info)
        struct net_device *ndev;
 
        net_device = alloc_net_device(device);
-       if (!net_device) {
-               ret = -ENOMEM;
-               goto cleanup;
-       }
+       if (!net_device)
+               return -ENOMEM;
 
        net_device->ring_size = ring_size;