[PATCH] drm/nouveau/platform: fix compilation if !CONFIG_IOMMU

[Arnd Bergmann]

On Wednesday 20 May 2015 15:10:24 Alexandre Courbot wrote:
> The lack of IOMMU API support can make nouveau_platform_probe_iommu()
> fail to compile because struct iommu_ops is then empty. Fix this by
> skipping IOMMU probe in that case - lack of IOMMU on platform devices
> is sub-optimal, but is not an error.
> 
> Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
> ---
> This is an alternative to https://lkml.org/lkml/2015/5/19/484. Most users
> of Nouveau do not care about IOMMU support, so we should not impose that
> option on them.
> 

Yes, good idea.

Acked-by: Arnd Bergmann <arnd at arndb.de>