Hi
On 11/19/19 6:56 PM, Jacob Pan wrote:
> PASID allocator uses IDR which is exclusive for the end of the
> allocation range. There is no need to decrement pasid_max.
>
> Fixes: af39507305fb ("iommu/vt-d: Apply global PASID in SVA")
> Reported-by: Eric Auger <[email protected]>
> Signed-off-by: Jacob Pan <[email protected]>
> Acked-by: Lu Baolu <[email protected]>
same (v2)
Reviewed-by: Eric Auger <[email protected]>
Eric
> ---
> 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 74df10a39dfc..e90d0b914afe 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -338,7 +338,7 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int
> flags, struct svm_dev_
> /* Do not use PASID 0 in caching mode (virtualised IOMMU) */
> ret = intel_pasid_alloc_id(svm,
> !!cap_caching_mode(iommu->cap),
> - pasid_max - 1, GFP_KERNEL);
> + pasid_max, GFP_KERNEL);
> if (ret < 0) {
> kfree(svm);
> kfree(sdev);
>
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