If CONFIG_PCI_ATS is not set, building fails: drivers/iommu/arm-smmu-v3.c: In function arm_smmu_ats_supported: drivers/iommu/arm-smmu-v3.c:2325:35: error: struct pci_dev has no member named ats_cap; did you mean msi_cap? return !pdev->untrusted && pdev->ats_cap; ^~~~~~~
ats_cap should only used when CONFIG_PCI_ATS is defined, so use #ifdef block to guard this. Fixes: bfff88ec1afe ("iommu/arm-smmu-v3: Rework enabling/disabling of ATS for PCI masters") Signed-off-by: YueHaibing <yuehaib...@huawei.com> --- drivers/iommu/arm-smmu-v3.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 66bf641..44ac9ac 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -2313,7 +2313,7 @@ static void arm_smmu_install_ste_for_dev(struct arm_smmu_master *master) static bool arm_smmu_ats_supported(struct arm_smmu_master *master) { - struct pci_dev *pdev; + struct pci_dev *pdev __maybe_unused; struct arm_smmu_device *smmu = master->smmu; struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(master->dev); @@ -2321,8 +2321,10 @@ static bool arm_smmu_ats_supported(struct arm_smmu_master *master) !(fwspec->flags & IOMMU_FWSPEC_PCI_RC_ATS) || pci_ats_disabled()) return false; +#ifdef CONFIG_PCI_ATS pdev = to_pci_dev(master->dev); return !pdev->untrusted && pdev->ats_cap; +#endif } static void arm_smmu_enable_ats(struct arm_smmu_master *master) -- 2.7.4