linux-kernel - Re: [PATCH 1/7] iommu/vt-d: Allocate pasid table in device probe path

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Date:   Sat, 5 Nov 2022 09:09:33 +0800
From:   Baolu Lu <baolu.lu@...ux.intel.com>
To:     "Tian, Kevin" <kevin.tian@...el.com>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>
Cc:     baolu.lu@...ux.intel.com, Joerg Roedel <joro@...tes.org>,
        Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        "Liu, Yi L" <yi.l.liu@...el.com>,
        "Pan, Jacob jun" <jacob.jun.pan@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/7] iommu/vt-d: Allocate pasid table in device probe path

On 2022/11/4 10:06, Tian, Kevin wrote:
>> From: Lu Baolu <baolu.lu@...ux.intel.com>
>> Sent: Thursday, November 3, 2022 1:53 PM
>>
>> @@ -4513,6 +4506,16 @@ static struct iommu_device
>> *intel_iommu_probe_device(struct device *dev)
>>
>>   	dev_iommu_priv_set(dev, info);
>>
>> +	if (sm_supported(iommu) && !dev_is_real_dma_subdevice(dev)) {
>> +		ret = intel_pasid_alloc_table(dev);
>> +		if (ret) {
>> +			dev_err(dev, "PASID table allocation failed\n");
>> +			dev_iommu_priv_set(dev, NULL);
>> +			kfree(info);
>> +			return ERR_PTR(ret);
>> +		}
>> +	}
>> +
> 
> move the added lines before dev_iommu_priv_set()

intel_pasid_alloc_table() needs to reference info and store the pasid
table into it.

Best regards,
baolu