Re: [PATCH v2 1/3] Drivers: hv: vmbus: Introduce table of VMBus protocol versions

[Andrea Parri <parri.andrea@gmail.com>]

> > @@ -244,20 +232,18 @@ int vmbus_connect(void)
> >  	 * version.
> >  	 */
> > 
> > -	version = VERSION_CURRENT;
> > +	for (i = 0; i < ARRAY_SIZE(vmbus_versions); i++) {
> > +		version = vmbus_versions[i];
> > 
> > -	do {
> >  		ret = vmbus_negotiate_version(msginfo, version);
> >  		if (ret == -ETIMEDOUT)
> >  			goto cleanup;
> > 
> >  		if (vmbus_connection.conn_state == CONNECTED)
> >  			break;
> > +	}
> > 
> > -		version = vmbus_get_next_version(version);
> > -	} while (version != VERSION_INVAL);
> > -
> > -	if (version == VERSION_INVAL)
> > +	if (vmbus_connection.conn_state != CONNECTED)
> >  		goto cleanup;
> > 
> 
> This is a nit, but the loop exit path bugs me.  When a connection
> is established, the loop is exited by the "break", and then
> conn_state has to be tested again to decide whether the loop
> exited due to getting a connection vs. hitting the end of the list.
> Slightly cleaner in my mind would be:
> 
> 	for (i=0; ; i++) {
> 		if (i == ARRAY_SIZE(vmbus_versions))
> 			goto cleanup;
> 
> 		version  = vmbus_versions[i];
> 		ret = vmbus_negotiate_version(msginfo, version);
> 		if (ret == -ETIMEDOUT)
> 			goto cleanup;
> 
> 		if (vmbus_connection.conn_state == CONNECTED)
> 			break;
> 	}

Indeed.  I applied this locally, for the next iteration.  Thank you for
the review, Michael.

  Andrea