Messages in this thread | | | From | Tomeu Vizoso <> | Date | Thu, 7 Jan 2016 15:55:43 +0100 | Subject | Re: [RFD] Functional dependencies between devices |
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On 30 October 2015 at 23:52, Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote: > On Tue, Oct 27, 2015 at 04:24:14PM +0100, Rafael J. Wysocki wrote: >> My idea is to represent a supplier-consumer dependency between devices (or >> more precisely between device+driver combos) as a "link" object containing >> pointers to the devices in question, a list node for each of them and some >> additional information related to the management of those objects, ie. >> something like: >> >> struct device_link { >> struct device *supplier; >> struct list_head supplier_node; >> struct device *consumer; >> struct list_head consumer_node; >> <flags, status etc> >> }; >> >> In general, there will be two lists of those things per device, one list >> of links to consumers and one list of links to suppliers. >> >> In that picture, links will be created by calling, say: >> >> int device_add_link(struct device *me, struct device *my_supplier, unsigned int flags); > > At first glance, I like this, nice. Now to see how well it can be > implemented :)
Hi Greg,
what's your opinion on using this to order device probes so we don't try to probe a device that we know it has unfulfilled dependencies?
Regards,
Tomeu
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