drm/i915/selftests: fix subtraction overflow bug
On some machines hole_end can be small enough to cause subtraction overflow. On the other side (addr + 2 * min_alignment) can overflow in case of mock tests. This patch should handle both cases. Fixes: e1c5f754 ("drm/i915: Avoid overflow in computing pot_hole loop termination") Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/3674Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com> Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com> Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220624113528.2159210-1-andrzej.hajda@intel.comSigned-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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