On Wed, Oct 04, 2023 at 04:17:17PM +0200, Stephan Gerhold wrote: > Instead of -EINVAL we could also use a different return code to indicate > the initial status is unknown. Or maybe there is some other option that > would be easier? This is working for me but I'm sending it as RFC to get > more feedback. :) The more normal thing here would be -EBUSY I think - -EINVAL kind of indicates that the operation will never work while in reality it could possibly work in future. Though for the RPMH it's not really the case that it ever supports readback, what it does is have it's own reference counting in the driver. Rather than doing this we should probably have logic in the core which sees that the driver has a write operation but no read operation and implements appropriate behaviour.
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