Re: [PATCH 2/7] iommu/ipmmu-vmsa: Call ipmmu_ctx_write_root() instead of open coding

Laurent Pinchart
2019-02-20T15:27:52Z

Hi Geert,

Thank you for the patch.

On Wed, Feb 20, 2019 at 04:05:26PM +0100, Geert Uytterhoeven wrote:
> There is a helper to write to the root IPMMU instance's registers, so
> let's use it.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
> drivers/iommu/ipmmu-vmsa.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
> index 9f2b781e20a0eba6..ac70cb967ff821c6 100644
> --- a/drivers/iommu/ipmmu-vmsa.c
> +++ b/drivers/iommu/ipmmu-vmsa.c
> @@ -280,8 +280,7 @@ static void ipmmu_ctx_write_all(struct ipmmu_vmsa_domain *domain,
> ipmmu_write(domain->mmu,
> domain->context_id * IM_CTX_SIZE + reg, data);
>
> - ipmmu_write(domain->mmu->root,
> - domain->context_id * IM_CTX_SIZE + reg, data);
> + ipmmu_ctx_write_root(domain, reg, data);

This makes the code harder to read in my opinion, and I don't think it
bring much optimization.

> }
>
> /* -----------------------------------------------------------------------------

--
Regards,

Laurent Pinchart