linux-kernel - Re: [PATCH v2 2/2] iommu/vt-d: Fix a bug for PDP check in prq_event

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Date:   Fri, 30 Oct 2020 20:49:49 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Yi Sun <yi.y.sun@...ux.intel.com>, joro@...tes.org,
        dwmw2@...radead.org, jean-philippe@...aro.org
Cc:     baolu.lu@...ux.intel.com, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, yi.l.liu@...el.com,
        jacob.jun.pan@...ux.intel.com
Subject: Re: [PATCH v2 2/2] iommu/vt-d: Fix a bug for PDP check in
 prq_event_thread

On 10/30/20 10:37 AM, Yi Sun wrote:
> From: "Liu, Yi L" <yi.l.liu@...el.com>
> 
> In prq_event_thread(), the QI_PGRP_PDP is wrongly set by
> 'req->pasid_present' which should be replaced to
> 'req->priv_data_present'.
> 
> Fixes: 5b438f4ba315 ("iommu/vt-d: Support page request in scalable mode")
> Signed-off-by: Liu, Yi L <yi.l.liu@...el.com>
> Signed-off-by: Yi Sun <yi.y.sun@...ux.intel.com>

Cc: stable@....kernel.org
Acked-by: Lu Baolu <baolu.lu@...ux.intel.com>

Best regards,
baolu

> ---
>   drivers/iommu/intel/svm.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
> index 7584669..3242ebd 100644
> --- a/drivers/iommu/intel/svm.c
> +++ b/drivers/iommu/intel/svm.c
> @@ -1035,7 +1035,7 @@ static irqreturn_t prq_event_thread(int irq, void *d)
>   			resp.qw0 = QI_PGRP_PASID(req->pasid) |
>   				QI_PGRP_DID(req->rid) |
>   				QI_PGRP_PASID_P(req->pasid_present) |
> -				QI_PGRP_PDP(req->pasid_present) |
> +				QI_PGRP_PDP(req->priv_data_present) |
>   				QI_PGRP_RESP_CODE(result) |
>   				QI_PGRP_RESP_TYPE;
>   			resp.qw1 = QI_PGRP_IDX(req->prg_index) |
>