virtio-net: on tx, only call napi_disable if tx napi is on

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As of tx napi, device down (`ip link set dev $dev down`) hangs unless
tx napi is enabled. Else napi_enable is not called, so napi_disable
will spin on test_and_set_bit NAPI_STATE_SCHED.

Only call napi_disable if tx napi is enabled.

Fixes: 5a719c2552ca ("virtio-net: transmit napi")
Reported-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Willem de Bruijn 2017-04-25 15:59:17 -04:00 • committed by David S. Miller

parent 1f7fe5d492

commit 78a57b482a

1 changed files with 8 additions and 2 deletions

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drivers/net/virtio_net.c

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