netdev - Re: [PATCH net-next] virtio-net: on tx, only call napi

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Message-Id: <20170426.145023.520426501343191968.davem@davemloft.net>
Date:   Wed, 26 Apr 2017 14:50:23 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     willemdebruijn.kernel@...il.com
Cc:     netdev@...r.kernel.org, mst@...hat.com, jasowang@...hat.com,
        virtualization@...ts.linux-foundation.org, willemb@...gle.com
Subject: Re: [PATCH net-next] virtio-net: on tx, only call napi_disable if
 tx napi is on

From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
Date: Tue, 25 Apr 2017 15:59:17 -0400

> From: Willem de Bruijn <willemb@...gle.com>
> 
> 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@...hat.com>
> Signed-off-by: Willem de Bruijn <willemb@...gle.com>

Applied, thanks.