[PATCH 6/9] Add a general, global device notification watch list [ver #5]

[Alan Stern]

On Fri, 5 Jul 2019, Greg Kroah-Hartman wrote:

> On Fri, Jul 05, 2019 at 09:04:17AM +0100, David Howells wrote:
> > Greg Kroah-Hartman <gregkh at linuxfoundation.org> wrote:
> > 
> > > Hm, good point, but there should be some way to test this to verify it
> > > works.  Maybe for the other types of events?
> > 
> > Keyrings is the simplest.  keyutils's testsuite will handle that.  I'm trying
> > to work out if I can simply make every macro in there that does a modification
> > perform a watch automatically to make sure the appropriate events happen.
> 
> That should be good enough to test the basic functionality.  After this
> gets merged I'll see if I can come up with a way to test the USB
> stuff...

You can create USB connect and disconnect events programmatically by
using dummy-hcd with gadget-zero.  Turning off the port's POWER feature
will cause a disconnect, and turning it back on will cause a connect.

Alan Stern