[PATCH] iommu/dart: Fix return code in apple_dart_domain_alloc_paging()

[Jason Gunthorpe]

On Mon, Oct 30, 2023 at 12:03:12PM +0300, Dan Carpenter wrote:
> The apple_dart_domain_alloc_paging() function is supposed to return NULL
> on error.  Returning an error pointer will lead to an Oops in
> __iommu_domain_alloc().
> 
> Fixes: 482feb5c6492 ("iommu/dart: Call apple_dart_finalize_domain() as part of alloc_paging()")
> Signed-off-by: Dan Carpenter <dan.carpenter at linaro.org>
> ---
>  drivers/iommu/apple-dart.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>

Really need to fix this so the function does return ERR_PTR..

Thanks,
Jason