virtio_net: move tx vq operation under tx queue lock

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It's unsafe to operate a vq from multiple threads.
Unfortunately this is exactly what we do when invoking
clean tx poll from rx napi.
Same happens with napi-tx even without the
opportunistic cleaning from the receive interrupt: that races
with processing the vq in start_xmit.

As a fix move everything that deals with the vq to under tx lock.

Fixes: b92f1e6751 ("virtio-net: transmit napi")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

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Michael S. Tsirkin 2021-04-13 01:35:26 -04:00

parent 6f5312f801

commit 5a2f966d0f

1 changed files with 21 additions and 1 deletions

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drivers/net/virtio_net.c

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