On Thu, May 09, 2013 at 12:50:46PM +0100, Grant Likely wrote: > However, if a device that shuts down resources after init has > completed and then cannot turn those resources back on when another > driver requests them then it sounds like there is a bigger design > problem. We're in a hotplug world and most of the time a driver cannot > assume that a resource will never get requested after initcalls have > completed. It sounds like a design bug in the driver if it cannot > handle that use case. Even if the driver copes fine it can still be desirable to avoid the power down/up cycle if it involves some user visible effect - things like blinking the display off then on for example. That said I am a little suspicious about this approach, it doesn't feel as robust as it should to go round individual callers.
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