tree 88b7d5831feec00ef2e95400ee5f5b20b9e385ad
parent e5f84c1444ae59c85bd25ba05393c6bc87067ddb
author Eric Dumazet <edumazet@google.com> 1479277452 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1481393242 +0100

virtio-net: add a missing synchronize_net()

[ Upstream commit 963abe5c8a0273a1cf5913556da1b1189de0e57a ]

It seems many drivers do not respect napi_hash_del() contract.

When napi_hash_del() is used before netif_napi_del(), an RCU grace
period is needed before freeing NAPI object.

Fixes: 91815639d880 ("virtio-net: rx busy polling support")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>