linux-kernel - Re: [PATCH v2 11/22] ath10k: Use iommu_paging_domain

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Message-ID: <bb8cf06e-4f96-4545-b459-3e70acb50f97@quicinc.com>
Date: Tue, 4 Jun 2024 06:39:48 -0700
From: Jeff Johnson <quic_jjohnson@...cinc.com>
To: Lu Baolu <baolu.lu@...ux.intel.com>, Joerg Roedel <joro@...tes.org>,
        Will
 Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        Jason
 Gunthorpe <jgg@...pe.ca>, Kevin Tian <kevin.tian@...el.com>
CC: Yi Liu <yi.l.liu@...el.com>, David Airlie <airlied@...il.com>,
        Daniel
 Vetter <daniel@...ll.ch>, Kalle Valo <kvalo@...nel.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Alex
 Williamson <alex.williamson@...hat.com>, <mst@...hat.com>,
        Jason Wang
	<jasowang@...hat.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan
 Hunter <jonathanh@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>, <iommu@...ts.linux.dev>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        <ath10k@...ts.infradead.org>
Subject: Re: [PATCH v2 11/22] ath10k: Use iommu_paging_domain_alloc()

+ath10k list for viibility

On 6/3/24 18:51, Lu Baolu wrote:
> An iommu domain is allocated in ath10k_fw_init() and is attached to
> ar_snoc->fw.dev in the same function. Use iommu_paging_domain_alloc() to
> make it explicit.
> 
> Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
> ---
>   drivers/net/wireless/ath/ath10k/snoc.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
> index 8530550cf5df..0fe47d51013c 100644
> --- a/drivers/net/wireless/ath/ath10k/snoc.c
> +++ b/drivers/net/wireless/ath/ath10k/snoc.c
> @@ -1635,10 +1635,10 @@ static int ath10k_fw_init(struct ath10k *ar)
>   
>   	ar_snoc->fw.dev = &pdev->dev;
>   
> -	iommu_dom = iommu_domain_alloc(&platform_bus_type);
> -	if (!iommu_dom) {
> +	iommu_dom = iommu_paging_domain_alloc(ar_snoc->fw.dev);
> +	if (IS_ERR(iommu_dom)) {
>   		ath10k_err(ar, "failed to allocate iommu domain\n");
> -		ret = -ENOMEM;
> +		ret = PTR_ERR(iommu_dom);
>   		goto err_unregister;
>   	}
>