[Xen-devel] determining if a backend device is not working

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

In my gplpv drivers, the best I have come up with to determine if the
backend is not working is to wait for a few seconds (30 currently), and
if the backend state hasn't changed by then then I assume that it's
broken.

Is there a better way? The situation where this comes up is when
something like ',hdc:cdrom,r' is specified in the config file.

Even though I set all of the frontend up, the backend just stays at
state 2 instead of transitioning to 4.

Thanks

James

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