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(parent: 57c1826) | patch
hv_netvsc: protect module refcount by checking net_device_ctx->vf_netdev
authorVitaly Kuznetsov <vkuznets@redhat.com>
Mon, 15 Aug 2016 15:48:42 +0000 (17:48 +0200)
committerDavid S. Miller <davem@davemloft.net>
Mon, 15 Aug 2016 20:48:07 +0000 (13:48 -0700)
commit0f20d795f78d182c4b743d880a5e8dc4d39892fe
tree3ac000985b098e8b6ad0773d495570a00c6393a8tree | snapshot (tar.gz zip)
parent57c1826b991244d2144eb6e3d5d1b13a53cbea63commit | diff
hv_netvsc: protect module refcount by checking net_device_ctx->vf_netdev

We're not guaranteed to see NETDEV_REGISTER/NETDEV_UNREGISTER notifications
only once per VF but we increase/decrease module refcount unconditionally.
Check vf_netdev to make sure we don't take/release it twice. We presume
that only one VF per netvsc device may exist.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/hyperv/netvsc_drv.c diff | blob | blame | history