From: Alex Elder <el...@linaro.org> Date: Tue, 8 Sep 2020 19:21:23 -0500
> We take a single IPA clock reference to keep the clock running > until we get a system suspend operation. When a system suspend > request arrives, we drop that reference, and if that's the last > reference (likely) we'll proceed with suspending endpoints and > disabling the IPA core clock and interconnects. > > In most places we simply set the reference count to 0 or 1 > atomically. Instead--primarily to catch coding errors--use an > atomic exchange to update the reference count value, and report > an error in the event the previous value was unexpected. > > In a few cases it's not hard to see that the error message should > never be reported. Report them anyway, but add some excitement > to the message by ending it with an exclamation point. > > Signed-off-by: Alex Elder <el...@linaro.org> Please use refcount_t if you're wanting to validate things like this. Thank you.
