From: xinhui pan <[email protected]>

[ Upstream commit 79fcd446e7e182c52c2c808c76f8de3eb6714349 ]

drm_gem_object_put() should be paired with drm_gem_object_lookup().

All gem objs are saved in fb->base.obj[]. Need put the old first before
assign a new obj.

Trigger VRAM leak by running command below
$ service gdm restart

Signed-off-by: xinhui pan <[email protected]>
Acked-by: Alex Deucher <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index 48cb33e5b382..f5fa1befa7e2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -910,8 +910,9 @@ int amdgpu_display_framebuffer_init(struct drm_device *dev,
        }
 
        for (i = 1; i < rfb->base.format->num_planes; ++i) {
+               drm_gem_object_get(rfb->base.obj[0]);
+               drm_gem_object_put(rfb->base.obj[i]);
                rfb->base.obj[i] = rfb->base.obj[0];
-               drm_gem_object_get(rfb->base.obj[i]);
        }
 
        return 0;
@@ -960,6 +961,7 @@ amdgpu_display_user_framebuffer_create(struct drm_device 
*dev,
                return ERR_PTR(ret);
        }
 
+       drm_gem_object_put(obj);
        return &amdgpu_fb->base;
 }
 
-- 
2.30.2

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