linux-kernel - Re: [PATCH 14/34] powerpc/dart: remove dead cleanup code in iommu_init_early_dart

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Message-ID: <20181206141135.GA4770@infradead.org>
Date:   Thu, 6 Dec 2018 06:11:35 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-arch@...r.kernel.org, linux-mm@...ck.org,
        iommu@...ts.linux-foundation.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/34] powerpc/dart: remove dead cleanup code in
 iommu_init_early_dart

ping?

On Wed, Nov 14, 2018 at 09:22:54AM +0100, Christoph Hellwig wrote:
> If dart_init failed we didn't have a chance to setup dma or controller
> ops yet, so there is no point in resetting them.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  arch/powerpc/sysdev/dart_iommu.c | 11 +----------
>  1 file changed, 1 insertion(+), 10 deletions(-)
> 
> diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c
> index a5b40d1460f1..283ce04c5844 100644
> --- a/arch/powerpc/sysdev/dart_iommu.c
> +++ b/arch/powerpc/sysdev/dart_iommu.c
> @@ -428,7 +428,7 @@ void __init iommu_init_early_dart(struct pci_controller_ops *controller_ops)
>  
>  	/* Initialize the DART HW */
>  	if (dart_init(dn) != 0)
> -		goto bail;
> +		return;
>  
>  	/* Setup bypass if supported */
>  	if (dart_is_u4)
> @@ -439,15 +439,6 @@ void __init iommu_init_early_dart(struct pci_controller_ops *controller_ops)
>  
>  	/* Setup pci_dma ops */
>  	set_pci_dma_ops(&dma_iommu_ops);
> -	return;
> -
> - bail:
> -	/* If init failed, use direct iommu and null setup functions */
> -	controller_ops->dma_dev_setup = NULL;
> -	controller_ops->dma_bus_setup = NULL;
> -
> -	/* Setup pci_dma ops */
> -	set_pci_dma_ops(&dma_nommu_ops);
>  }
>  
>  #ifdef CONFIG_PM
> -- 
> 2.19.1
> 
> _______________________________________________
> iommu mailing list
> iommu@...ts.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu
---end quoted text---

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