[PATCH RFC 03/17] of: Use -ENODEV consistently in of_iommu_configure()

[Rob Herring]

On Fri, Nov 03, 2023 at 01:44:48PM -0300, Jason Gunthorpe wrote:
> Instead of returning 1 and trying to handle positive error codes just
> stick to the convention of returning -ENODEV. Remove references to ops
> from of_iommu_configure(), a NULL ops will already generate an error code.

nit: "iommu: of: ..." or "iommu/of: " for the subject. "of: ..." is 
generally drivers/of/.

> 
> There is no reason to check dev->bus, if err=0 at this point then the
> called configure functions thought there was an iommu and we should try to
> probe it. Remove it.
> 
> Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>
> ---
>  drivers/iommu/of_iommu.c | 42 +++++++++++++---------------------------
>  1 file changed, 13 insertions(+), 29 deletions(-)