linux-kernel - RE: [PATCH v4 08/10] iommu: Prepare for separating SVA and IOPF

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Date:   Fri, 25 Aug 2023 08:05:48 +0000
From:   "Tian, Kevin" <kevin.tian@...el.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>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Nicolin Chen <nicolinc@...dia.com>
CC:     "Liu, Yi L" <yi.l.liu@...el.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Jason Gunthorpe" <jgg@...dia.com>
Subject: RE: [PATCH v4 08/10] iommu: Prepare for separating SVA and IOPF

> From: Lu Baolu <baolu.lu@...ux.intel.com>
> Sent: Friday, August 25, 2023 10:30 AM
> 
> -	list_for_each_entry_safe(iopf, next, &group->faults, list) {
> +	list_for_each_entry(iopf, &group->faults, list) {
>  		/*
>  		 * For the moment, errors are sticky: don't handle
> subsequent
>  		 * faults in the group if there is an error.
> @@ -69,14 +62,10 @@ static void iopf_handler(struct work_struct *work)
>  		if (status == IOMMU_PAGE_RESP_SUCCESS)
>  			status = domain->iopf_handler(&iopf->fault,
>  						      domain->fault_data);
> -
> -		if (!(iopf->fault.prm.flags &
> -		      IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE))
> -			kfree(iopf);
>  	}

then no need to continue if status is not success. Yes this is fixed
in next patch but logically the change more suits here.

Reviewed-by: Kevin Tian <kevin.tian@...el.com>