[Intel-gfx] [PATCH 03/15] drm/i915: port i965_irq_uninstall go INTEL_IRQ_REG_RESET

[Chris Wilson]

On Tue, Jul 23, 2013 at 07:33:43PM -0300, Paulo Zanoni wrote:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> 
> The problem here is that we have the PIPESTAT registers between IER
> and IIR, so when we use intel_irq_reg_reset we flip the order used to
> reset IIR and PIPESTAT. That should be safe since after we clear
> IMR/IER we won't get any other IIR/PIPESTAT interrupts. Still, the
> change is on its own patch, so it should be easy to bisect and revert
> if needed.

This is wrong. PIPESTAT needs to be cleared before IIR.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre