The function 'gen8_ggtt_bind_get_ce' previously did not handle the case where 'intel_gt_pm_get_if_awake()' returns 'INTEL_WAKEREF_DEF'. This value is returned when the 'intel_ref_tracker_alloc()' call within 'intel_gt_pm_get_if_awake()' fails to allocate due to memory pressure or other constraints. 'intel_ref_tracker_alloc()' uses 'ref_tracker_alloc()' with the 'GFP_NOWAIT' flag, which can return 'NULL' if allocation fails. In this case, the function explicitly returns 'INTEL_WAKEREF_DEF'. This patch adds a check for 'INTEL_WAKEREF_DEF' in 'gen8_ggtt_bind_get_ce' to ensure that such errors are properly handled. If 'INTEL_WAKEREF_DEF' is returned, the function returns 'NULL' . Signed-off-by: Ingyu Jang <ingyujang25@xxxxxxxxx> --- drivers/gpu/drm/i915/gt/intel_ggtt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c b/drivers/gpu/drm/i915/gt/intel_ggtt.c index d60a6ca0cae5..8d22d8f2243d 100644 --- a/drivers/gpu/drm/i915/gt/intel_ggtt.c +++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c @@ -311,7 +311,7 @@ static struct intel_context *gen8_ggtt_bind_get_ce(struct i915_ggtt *ggtt, intel * doing rpm_resume(). */ *wakeref = intel_gt_pm_get_if_awake(gt); - if (!*wakeref) + if (!*wakeref || *wakeref == INTEL_WAKEREF_DEF) return NULL; intel_engine_pm_get(ce->engine); -- 2.34.1
