Don't attempt to fault and re-populate purged objects. By some fluke this passes the dontneed-after-mmap IGT, but for the wrong reasons. Fixes:cf3e3e86d7("drm/i915: Use ttm mmap handling for ttm bo's.") Signed-off-by: Matthew Auld <matthew.auld@intel.com> Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220106174910.280616-2-matthew.auld@intel.com (cherry picked from commitf3cb4a2de5) Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>