Dear Marek,
On Thu, 25 Jun 2015 15:10:12 +0200
Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> wrote:
> Some drivers (like Exynos mixer) calls
> drm_iommu_attach_device_if_possible before registering crtc, so
> additional check for NULL crtc pointer is required.
It seems reasonable.
Reviewed-by: Hyungwon Hwang <human.hwang@xxxxxxxxxxx>
>
> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> ---
> drivers/gpu/drm/exynos/exynos_drm_iommu.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_iommu.c
> b/drivers/gpu/drm/exynos/exynos_drm_iommu.c index
> d4ec7465e9cc..d4eb730ba254 100644 ---
> a/drivers/gpu/drm/exynos/exynos_drm_iommu.c +++
> b/drivers/gpu/drm/exynos/exynos_drm_iommu.c @@ -151,7 +151,7 @@ int
> drm_iommu_attach_device_if_possible(struct exynos_drm_crtc
> *exynos_crtc, int ret = 0;
> if (is_drm_iommu_supported(drm_dev)) {
> - if (exynos_crtc->ops->clear_channels)
> + if (exynos_crtc && exynos_crtc->ops->clear_channels)
> exynos_crtc->ops->clear_channels(exynos_crtc);
> return drm_iommu_attach_device(drm_dev, subdrv_dev);
> }
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