From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Fri, 25 Nov 2016 14:01:32 +0300
> We shouldn't dereference "iommu" until after we have checked that it is
> non-NULL.
>
> Fixes: f08978b0fdbf ("sparc64: Enable sun4v dma ops to use IOMMU v2 APIs")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Applied.
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