linux-kernel - [PATCH AUTOSEL 5.12 1/5] drm/ttm: Do not add non-system domain BO into swap list

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Date:   Mon, 17 May 2021 21:09:36 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     xinhui pan <xinhui.pan@....com>, Guchun Chen <guchun.chen@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        Sasha Levin <sashal@...nel.org>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.12 1/5] drm/ttm: Do not add non-system domain BO into swap list

From: xinhui pan <xinhui.pan@....com>

[ Upstream commit ad2c28bd9a4083816fa45a7e90c2486cde8a9873 ]

BO would be added into swap list if it is validated into system domain.
If BO is validated again into non-system domain, say, VRAM domain. It
actually should not be in the swap list.

Signed-off-by: xinhui pan <xinhui.pan@....com>
Acked-by: Guchun Chen <guchun.chen@....com>
Acked-by: Alex Deucher <alexander.deucher@....com>
Reviewed-by: Christian König <christian.koenig@....com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210224032808.150465-1-xinhui.pan@amd.com
Signed-off-by: Christian König <christian.koenig@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/ttm/ttm_bo.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 101a68dc615b..799ec7a7caa4 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -153,6 +153,8 @@ void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo,
 
 		swap = &ttm_bo_glob.swap_lru[bo->priority];
 		list_move_tail(&bo->swap, swap);
+	} else {
+		list_del_init(&bo->swap);
 	}
 
 	if (bdev->driver->del_from_lru_notify)
-- 
2.30.2