Re: [Xen-devel] [PATCH 1/2] xen: close evtchn port if binding to irq fails

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Feb 18, 2013 at 02:57:58PM +0000, Wei Liu wrote:
> Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>

I thought we had discussed doing this check in the user of
this as well?

> ---
>  drivers/xen/evtchn.c |   10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
> index b1f60a0..b2db77e 100644
> --- a/drivers/xen/evtchn.c
> +++ b/drivers/xen/evtchn.c
> @@ -269,6 +269,14 @@ static int evtchn_bind_to_user(struct per_user_data *u, 
> int port)
>                                      u->name, (void *)(unsigned long)port);
>       if (rc >= 0)
>               rc = evtchn_make_refcounted(port);
> +     else {
> +             /* bind failed, should close the port now */
> +             struct evtchn_close close;
> +             close.port = port;
> +             if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0)
> +                     BUG();
> +             set_port_user(port, NULL);
> +     }
>  
>       return rc;
>  }
> @@ -277,6 +285,8 @@ static void evtchn_unbind_from_user(struct per_user_data 
> *u, int port)
>  {
>       int irq = irq_from_evtchn(port);
>  
> +     BUG_ON(irq < 0);
> +
>       unbind_from_irqhandler(irq, (void *)(unsigned long)port);
>  
>       set_port_user(port, NULL);
> -- 
> 1.7.10.4
> 

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