[patch] drm/tegra: checking IS_ERR() instead of NULL

[Thierry Reding]

On Thu, Dec 04, 2014 at 02:00:35PM +0300, Dan Carpenter wrote:
> iommu_domain_alloc() returns NULL on error, it never returns error
> pointers.
> 
> Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
> 
> diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
> index e549afe..fa16048 100644
> --- a/drivers/gpu/drm/tegra/drm.c
> +++ b/drivers/gpu/drm/tegra/drm.c
> @@ -36,8 +36,8 @@ static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
>  
>  	if (iommu_present(&platform_bus_type)) {
>  		tegra->domain = iommu_domain_alloc(&platform_bus_type);
> -		if (IS_ERR(tegra->domain)) {
> -			err = PTR_ERR(tegra->domain);
> +		if (!tegra->domain) {
> +			err = -ENOMEM;
>  			goto free;
>  		}

Oh, good catch. Applied, thanks.

Thierry
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