linux-kernel - Re: [PATCH v1 04/10] iommu/vt-d: Remove iova_cache

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Message-ID: <ce1183f5-cec1-9438-4b5d-a4a99b046ab6@huawei.com>
Date:   Mon, 7 Feb 2022 10:39:58 +0000
From:   John Garry <john.garry@...wei.com>
To:     Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        "Kevin Tian" <kevin.tian@...el.com>,
        Ashok Raj <ashok.raj@...el.com>, Liu Yi L <yi.l.liu@...el.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>
CC:     <linux-kernel@...r.kernel.org>, <iommu@...ts.linux-foundation.org>,
        "Jason Gunthorpe" <jgg@...dia.com>,
        Robin Murphy <robin.murphy@....com>,
        "Christoph Hellwig" <hch@....de>
Subject: Re: [PATCH v1 04/10] iommu/vt-d: Remove iova_cache_get/put()

On 07/02/2022 06:41, Lu Baolu wrote:
> diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
> index 583ec0fa4ac1..e8d58654361c 100644
> --- a/drivers/iommu/intel/iommu.c
> +++ b/drivers/iommu/intel/iommu.c
> @@ -3348,9 +3348,6 @@ static inline int iommu_devinfo_cache_init(void)
>   static int __init iommu_init_mempool(void)
>   {
>   	int ret;
> -	ret = iova_cache_get();
> -	if (ret)
> -		return ret;
>   
>   	ret = iommu_domain_cache_init();
>   	if (ret)
> @@ -3362,7 +3359,6 @@ static int __init iommu_init_mempool(void)
>   
>   	kmem_cache_destroy(iommu_domain_cache);
>   domain_error:

nit: is this label still really required? only failures in 
iommu_domain_cache_init() jump to it, and that can return directly now.

Thanks,
John

> -	iova_cache_put();