Re: [PATCH v7 5/5] iommu/vt-d: Fail probe on ATS configuration failure

[Baolu Lu]

On 6/1/26 22:36, Pranjal Shrivastava wrote:
> Update the Intel VT-d driver to handle ATS configuration and enablement
> more strictly. Specifically, update the device probe to fail if
> pci_prepare_ats() returns an error. This ensures that any ATS-capable
> master reaching the attach phase is guaranteed to have a valid config.
>
> Additionally, update iommu_enable_pci_ats() to WARN() if pci_enable_ats
> fails. Since earlier checks in the probe phase preclude config-related
> failures, any failure during hardware enablement is considered a kernel
> bug.
>
> Signed-off-by: Pranjal Shrivastava<praan@xxxxxxxxxx>
> ---
>   drivers/iommu/intel/iommu.c | 15 ++++++++++++---
>   1 file changed, 12 insertions(+), 3 deletions(-)

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