[Bug 98101] [BYT] [IGT] gem_tiled_blits interruptible & normal subtests [Regression]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98101

--- Comment #7 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit d7f7633557503bd231347d8896b9a6fb08f84e00
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Oct 7 07:53:25 2016 +0100

    drm/i915: Force relocations via cpu if we run out of idle aperture

    If we run out of enough aperture space to fit the entire object, we
    fallback to trying to insert a single page. However, if that also fails,
    we currently fail to userspace with an unexpected ENOSPC. (ENOSPC means
    to userspace that their batch could not be fitted within the GTT.) Prior
    to commit e8cb909ac3ab ("drm/i915: Fallback to single page GTT
    mmappings for relocations") the approach is to fallback to using the
    slow CPU relocation path in case of iomapping failure, and that is the
    behaviour we need to restore.

    Fixes: e8cb909ac3ab ("drm/i915: Fallback to single page GTT mmappings...")

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