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I agree it is fragile tricky.. > > > > Still it isn't an urgent reason to change it around, but the best > > pattern is to put the allocate, dev.release=, and device_initialize() > > in one 'alloc' function. Then the other function calls it and always > > unwinds with put_device. Use device_add(). > > > > This avoids mixing the different kfree/put_device error unwind regimes > > into the same function.. > > > > Something like Yeah, this is the safest way I know to use these interfaces Jason