lkml.org 
[lkml]   [2006]   [Nov]   [21]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateTue, 21 Nov 2006 09:05:48 +0100
FromStefan Richter <>
SubjectRe: deadlock in "modprobe -r ohci1394" shortly after "modprobe ohci1394"
Alan Stern wrote:
> The real issue here is the way ieee1394 sets up children of devices with
> no driver.  On the face of it that is quite illogical: If a device has no
> driver, then who can interrogate it to find out about its children?

Perhaps I should turn this dummy driver into an actual representation of
ieee1394 or ieee1394's nodemgr.

> USB faces a similar situation.  In a USB device, all the real work is 
> actually done by "interfaces".  So we set up a device structure for the 
> USB device itself, plus device structures for each of its interfaces.  The 
> parent structure is bound to a (more or less) dummy driver, which insures 
> that the child structures are deleted whenever it gets unbound.

I will eventually more thoroughly look at how USB and other subsystems
with device hierarchies do it.

> Still, maybe some compromise can be reached.  Perhaps Dmitry's idea, or 
> something like it, can be adopted.

Thanks for the input of both of you.
-- 
Stefan Richter
-=====-=-==- =-== =-=-=
http://arcgraph.de/sr/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2006-11-21 08:09    [from the cache]
©2003-2008