Staging: hv: netvsc: Prevent outgoing traffic when netvsc dev is destroyed

Prevent outgoing traffic when netvsc dev is destroyed.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/hv/netvsc.c b/drivers/staging/hv/netvsc.c
index 8eb4039b5ff8571a51df1ae1bfdc541a9887c813..67065c182b708d185f1f742bd039dbd7bf82c21c 100644 (file)
--- a/drivers/staging/hv/netvsc.c
+++ b/drivers/staging/hv/netvsc.c
@@ -56,7 +56,8 @@ static struct netvsc_device *get_outbound_net_device(struct hv_device *device)
        struct netvsc_device *net_device;
 
        net_device = device->ext;
-       if (net_device && atomic_read(&net_device->refcnt) > 1)
+       if (net_device && (atomic_read(&net_device->refcnt) > 1) &&
+               !net_device->destroy)
                atomic_inc(&net_device->refcnt);
        else
                net_device = NULL;