linux-kernel - [PATCH 2/3] drm/msm/a6xx: Skip snapshotting unused GMU buffers

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Message-Id: <20221013225520.371226-3-robdclark@gmail.com>
Date:   Thu, 13 Oct 2022 15:55:14 -0700
From:   Rob Clark <robdclark@...il.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        Rob Clark <robdclark@...omium.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Akhil P Oommen <quic_akhilpo@...cinc.com>,
        Douglas Anderson <dianders@...omium.org>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 2/3] drm/msm/a6xx: Skip snapshotting unused GMU buffers

From: Rob Clark <robdclark@...omium.org>

Some buffers are unused on certain sub-generations of a6xx.  So just
skip them.

Signed-off-by: Rob Clark <robdclark@...omium.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
index 730355f9e2d4..b0124d0f286c 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
@@ -813,6 +813,9 @@ static struct msm_gpu_state_bo *a6xx_snapshot_gmu_bo(
 {
 	struct msm_gpu_state_bo *snapshot;
 
+	if (!bo->size)
+		return NULL;
+
 	snapshot = state_kcalloc(a6xx_state, 1, sizeof(*snapshot));
 	if (!snapshot)
 		return NULL;
-- 
2.37.3