"Michael S. Tsirkin" <mst@redhat.com> wrote:
quoted text
> vq log eventfd context pointer needs to be initialized, otherwise
> operation may fail or oops if log is enabled but log eventfd not set by
> userspace.
>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Reviewed-by: Juan Quintela <quintela@redhat.com>

When log_ctx for device is created, it is copied to the vq.  This reset
was missing.

quoted text
> ---
>  drivers/vhost/vhost.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
> index c767279..d4f8fdf 100644
> --- a/drivers/vhost/vhost.c
> +++ b/drivers/vhost/vhost.c
> @@ -121,6 +121,7 @@ static void vhost_vq_reset(struct vhost_dev *dev,
>  	vq->kick = NULL;
>  	vq->call_ctx = NULL;
>  	vq->call = NULL;
> +	vq->log_ctx = NULL;
>  }
>  
>  long vhost_dev_init(struct vhost_dev *dev,
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