EIR
error->eir = I915_READ(EIR);
I915_WRITE(EIR, I915_READ(EIR));
eir = I915_READ(EIR);
*eir = I915_READ16(EIR);
I915_WRITE16(EIR, *eir);
*eir_stuck = I915_READ16(EIR);
*eir = I915_READ(EIR);
I915_WRITE(EIR, *eir);
*eir_stuck = I915_READ(EIR);