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0edda1d681
The HW resets it CSB tail pointer on resetting the engine. Most of the time. In case it doesn't (and for system resume) we write the expected value anyway. For extra paranoia, flush the write before we invalidate the cacheline. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190412110159.10495-1-chris@chris-wilson.co.uk |
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