Re: [Xen-devel] [PATCH 4/4] review For Oracle bug 14470382

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

On Fri, Jan 18, 2013 at 09:57:48AM +0800, jianhai luan wrote:
> +/**
> + * By Connected->Connected transition, netfront will watch the change and
> + * send gratuitous ARP.
> + */
> +static void notify_front_arping(struct xenbus_device *dev)
> +{
> +     struct xenbus_transaction xbt;
> +     int err;
> +
> +     if (xenbus_read_driver_state(dev->nodename) != XenbusStateConnected)
> +             return;
> +
> +again:
> +     err = xenbus_transaction_start(&xbt);
> +     if (err) {
> +             printk(KERN_ALERT "Error starting transaction");
> +             return;
> +     }
> +
> +     err = xenbus_printf(xbt, dev->nodename, "state", "%d", dev->state);
> +     if(err) {
> +             printk(KERN_ALERT "Error writing the state");
> +             xenbus_transaction_end(xbt, 1);
> +             return;
> +     }
> +     
> +     err = xenbus_transaction_end(xbt, 0);
> +     if (err == -EAGAIN)
> +             goto again;

Why would we get a -EAGAIN here?  My reading says that it would have
to come as the msg->body from the XenServer.  I would be tempted to
just ignore those errors.

(I don't know anything about Xen though, so I'm probably full of
crap).

regards,
dan carpenter



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