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drm/exynos: fix possible infinite loop issue

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This patch fixes possible infinite loop issue by postponing
registration to non kms drivers after component_master_add_with_match
call, which can be incurred in all cases that non kms driver is probed
and then component bind is failed

This patch should be applied on top of below patches,
	http://comments.gmane.org/gmane.comp.video.dri.devel/117740
	http://www.spinics.net/lists/linux-samsung-soc/msg38624.html

Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Inki Dae
2014-11-07 21:32:34 +09:00
parent 2d15118750
commit e9fbdcb45a
1 changed files with 15 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/gpu/drm/exynos/exynos_drm_drv.c
View File

@@ -591,10 +591,21 @@ static int exynos_drm_platform_probe(struct platform_device *pdev)
goto err_unregister_mixer_drv;
#endif
match = exynos_drm_match_add(&pdev->dev);
if (IS_ERR(match)) {
ret = PTR_ERR(match);
goto err_unregister_hdmi_drv;
}
ret = component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
match);
if (ret < 0)
goto err_unregister_hdmi_drv;
#ifdef CONFIG_DRM_EXYNOS_G2D
ret = platform_driver_register(&g2d_driver);
if (ret < 0)
goto err_unregister_hdmi_drv;
goto err_del_component_master;
#endif
#ifdef CONFIG_DRM_EXYNOS_FIMC
@@ -625,23 +636,9 @@ static int exynos_drm_platform_probe(struct platform_device *pdev)
goto err_unregister_ipp_drv;
#endif
match = exynos_drm_match_add(&pdev->dev);
if (IS_ERR(match)) {
ret = PTR_ERR(match);
goto err_unregister_resources;
}
ret = component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
match);
if (ret < 0)
goto err_unregister_resources;
return ret;
err_unregister_resources:
#ifdef CONFIG_DRM_EXYNOS_IPP
exynos_platform_device_ipp_unregister();
err_unregister_ipp_drv:
platform_driver_unregister(&ipp_driver);
err_unregister_gsc_drv:
@@ -664,9 +661,11 @@ static int exynos_drm_platform_probe(struct platform_device *pdev)
#ifdef CONFIG_DRM_EXYNOS_G2D
platform_driver_unregister(&g2d_driver);
err_unregister_hdmi_drv:
err_del_component_master:
#endif
component_master_del(&pdev->dev, &exynos_drm_ops);
err_unregister_hdmi_drv:
#ifdef CONFIG_DRM_EXYNOS_HDMI
platform_driver_unregister(&hdmi_driver);
err_unregister_mixer_drv: