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

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