On system suspend when system memory is low then i915_gem_obj_copy_ttm()
could fail trying to backup a lmem obj. GEM_WARN_ON() is not enough,
suspend shouldn't continue if i915_ttm_backup() throws an error.
v2: Keep the fdo issue till we have a igt test(Matt).
v3: Use %pe(Andrzej)
References: https://gitlab.freedesktop.org/drm/intel/-/issues/6529
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Suggested-by: Chris P Wilson <chris.p.wilson@intel.com>
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220901172217.18392-1-nirmoy.das@intel.com
goto out_no_populate;
err = i915_gem_obj_copy_ttm(backup, obj, pm_apply->allow_gpu, false);
- GEM_WARN_ON(err);
+ if (err) {
+ drm_err(&i915->drm,
+ "Unable to copy from device to system memory, err:%pe\n",
+ ERR_PTR(err));
+ goto out_no_populate;
+ }
ttm_bo_wait_ctx(backup_bo, &ctx);
obj->ttm.backup = backup;