[Intel-gfx] [PATCH 04/10] drm/i915: fix false positive "Unclaimed write" messages

[Paulo Zanoni]

Hi

2012/11/20 Damien Lespiau <damien.lespiau at intel.com>:
>> +       if (IS_HASWELL(dev_priv->dev) && (I915_READ_NOTRACE(GEN7_ERR_INT) & ERR_INT_MMIO_UNCLAIMED)) { \
>> +               DRM_ERROR("Unknown unclaimed register before writing to %x\n", reg); \
>> +               I915_WRITE_NOTRACE(GEN7_ERR_INT, ERR_INT_MMIO_UNCLAIMED); \
>> +       } \
>
> Do we really have to DRM_ERROR here? this bit being set seems to be
> beyond things we can fix (BIOS leaving that behind?)

If we do I915_WRITE_NOTRACE or I915_READ_NOTRACE to a register that
does not exist I believe the unclaimed bit will be set.

>
> --
> Damien



-- 
Paulo Zanoni