Re: [PATCH v8 12/14] x86: perf: intel_pt: Intel PT PMU driver

[Peter Zijlstra]

On Mon, Jan 12, 2015 at 06:37:36PM +0200, Alexander Shishkin wrote:
> Peter Zijlstra <peterz@xxxxxxxxxxxxx> writes:
> 
> > Also, if its already enabled, should we not return ENODEV as well, no
> > saying who or what programmed it, we should not be touching it.
> 
> Or EBUSY?

Sure, same end result I imagine, driver doesn't load.
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