Re: [PATCH 9 of 20] ipath - char devices for diagnostics and lightweight subnet management

[Greg KH <gregkh@suse.de>]

On Fri, Mar 10, 2006 at 05:43:50AM -0800, Bryan O'Sullivan wrote:
> On Thu, 2006-03-09 at 21:55 -0800, Roland Dreier wrote:
> 
> > No, the only problems are with the way the various pieces of your
> > drivers refer to devices by index.
> 
> OK.  What's a safe way to iterate over the devices in the presence of
> hotplug, then?  I assume it's list_for_each_mumble; I just don't know
> what mumble is :-)

You keep an internal list of devices, if you really need to do such a
thing.

> > Also you only do this when the module is loaded, so you won't handle
> > devices that are hot-plugged later.
> 
> No, ipath_max is updated any time a probe routine is called.
> 
> >   And I don't see anything that
> > would handle hot unplug either.
> 
> What would this anything look like, if I were hoping for an example to
> emulate?  There's nothing in LDD3 about this, so I'm kind of in the
> dark.

It's just the "disconnect" PCI function being called, which can happen
at any time.

thanks,

greg k-h