linux-kernel - [PATCH 5.12 242/384] drm/amdgpu/ttm: Fix memory leak userptr pages

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Date:   Mon, 10 May 2021 12:20:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Christian König <christian.koenig@....com>,
        Daniel Gomez <daniel@...c.com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 242/384] drm/amdgpu/ttm: Fix memory leak userptr pages

From: Daniel Gomez <daniel@...c.com>

[ Upstream commit 0f6f9dd490d524930081a6ef1d60171ce39220b9 ]

If userptr pages have been pinned but not bounded,
they remain uncleared.

Reviewed-by: Christian König <christian.koenig@....com>
Signed-off-by: Daniel Gomez <daniel@...c.com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 5efa331e3ee8..f61fd2cf3fee 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1162,13 +1162,13 @@ static void amdgpu_ttm_backend_unbind(struct ttm_bo_device *bdev,
 	struct amdgpu_ttm_tt *gtt = (void *)ttm;
 	int r;
 
-	if (!gtt->bound)
-		return;
-
 	/* if the pages have userptr pinning then clear that first */
 	if (gtt->userptr)
 		amdgpu_ttm_tt_unpin_userptr(bdev, ttm);
 
+	if (!gtt->bound)
+		return;
+
 	if (gtt->offset == AMDGPU_BO_INVALID_OFFSET)
 		return;
 
-- 
2.30.2