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drm/msm/dp: Free resources after unregistering them

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The DP component's unbind operation walks through the submodules to
unregister and clean things up. But if the unbind happens because the DP
controller itself is being removed, all the memory for those submodules
has just been freed.

Change the order of these operations to avoid the many use-after-free
that otherwise happens in this code path.

Fixes: c943b4948b ("drm/msm/dp: add displayPort driver support")
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/542166/
Link: https://lore.kernel.org/r/20230612220259.1884381-1-quic_bjorande@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Bjorn Andersson 2023-06-12 15:02:59 -07:00 committed by Dmitry Baryshkov
parent a7bfb2ad21
commit fa0048a4b1
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/msm/dp/dp_display.c
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@ -1300,9 +1300,9 @@ static int dp_display_remove(struct platform_device *pdev)
{
struct dp_display_private *dp = dev_get_dp_display_private(&pdev->dev);
component_del(&pdev->dev, &dp_display_comp_ops);
dp_display_deinit_sub_modules(dp);
component_del(&pdev->dev, &dp_display_comp_ops);
platform_set_drvdata(pdev, NULL);
return 0;