Re: [PATCH v7 04/11] iommu/vt-d: Replace Intel specific PASID allocator with IOASID

[Lu Baolu]

Hi,

On 10/25/19 3:54 AM, Jacob Pan wrote:
> Make use of generic IOASID code to manage PASID allocation,
> free, and lookup. Replace Intel specific code.
>
> Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
> ---
>   drivers/iommu/intel-iommu.c | 12 ++++++------
>   drivers/iommu/intel-pasid.c | 36 ------------------------------------
>   drivers/iommu/intel-svm.c   | 39 +++++++++++++++++++++++----------------
>   3 files changed, 29 insertions(+), 58 deletions(-)

[--cut--]

> @@ -458,10 +465,11 @@ int intel_svm_is_pasid_valid(struct device *dev, int pasid)
>   	if (!iommu)
>   		goto out;
>   
> -	svm = intel_pasid_lookup_id(pasid);
> -	if (!svm)
> +	svm = ioasid_find(NULL, pasid, NULL);
> +	if (IS_ERR(svm)) {

Shall we check whether svm is NULL?

Others looks good to me.

Reviewed-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>

Best regards,
baolu