[PATCH -next v2] drm/exynos/iommu: fix return value check in drm_create_iommu_mapping()

[Inki Dae]

Applied.

Thanks,
Inki Dae

2012/12/10 Wei Yongjun <weiyj.lk at gmail.com>

> From: Wei Yongjun <yongjun_wei at trendmicro.com.cn>
>
> In case of error, function arm_iommu_create_mapping() returns
> ERR_PTR() and never returns NULL. The NULL test in the return
> value check should be replaced with IS_ERR().
>
> Signed-off-by: Wei Yongjun <yongjun_wei at trendmicro.com.cn>
> ---
>  drivers/gpu/drm/exynos/exynos_drm_iommu.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_iommu.c
> b/drivers/gpu/drm/exynos/exynos_drm_iommu.c
> index 09db198..2482b7f 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_iommu.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_iommu.c
> @@ -56,8 +56,8 @@ int drm_create_iommu_mapping(struct drm_device *drm_dev)
>         mapping = arm_iommu_create_mapping(&platform_bus_type,
> priv->da_start,
>                                                 priv->da_space_size,
>                                                 priv->da_space_order);
> -       if (!mapping)
> -               return -ENOMEM;
> +       if (IS_ERR(mapping))
> +               return PTR_ERR(mapping);
>
>         dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
>                                         GFP_KERNEL);
>
>
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