drm/amdgpu: fix unload driver issue for virtual display

[ Upstream commit 3a1d19a29670aa7eb58576a31883d0aa9fb77549 ]

Virtual display doesn't allocate amdgpu_encoder when initializing,
so will get invaild pointer if try to free amdgpu_encoder when
unloading driver.

Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
index c2bd9f045532b3f24b6f34004233ec9ed4e70614..6d75fd0e3105f297c9a3bd435a7f28c528c67d74 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
@@ -565,11 +565,8 @@ static const struct drm_encoder_helper_funcs dce_virtual_encoder_helper_funcs =
 
 static void dce_virtual_encoder_destroy(struct drm_encoder *encoder)
 {
-       struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
-
-       kfree(amdgpu_encoder->enc_priv);
        drm_encoder_cleanup(encoder);
-       kfree(amdgpu_encoder);
+       kfree(encoder);
 }
 
 static const struct drm_encoder_funcs dce_virtual_encoder_funcs = {