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iommu/vt-d: Change dmar_ats_supported() to return boolean

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According to "Function return values and names" in coding-style.rst, the
dmar_ats_supported() function should return a boolean instead of an
integer. Also, rename "ret" to "supported" to be more straightforward.

Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20250509140021.4029303-3-wei.w.wang@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Wei Wang 2025-05-13 11:07:39 +08:00 committed by Joerg Roedel
parent 3df2ebcee9
commit f3fe7e1830
1 changed files with 10 additions and 9 deletions
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19
drivers/iommu/intel/iommu.c
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@ -2702,15 +2702,16 @@ static struct dmar_satc_unit *dmar_find_matched_satc_unit(struct pci_dev *dev)
return satcu;
}
static int dmar_ats_supported(struct pci_dev *dev, struct intel_iommu *iommu)
static bool dmar_ats_supported(struct pci_dev *dev, struct intel_iommu *iommu)
{
int i, ret = 1;
struct pci_bus *bus;
struct pci_dev *bridge = NULL;
struct device *tmp;
struct acpi_dmar_atsr *atsr;
struct dmar_atsr_unit *atsru;
struct dmar_satc_unit *satcu;
struct acpi_dmar_atsr *atsr;
bool supported = true;
struct pci_bus *bus;
struct device *tmp;
int i;
dev = pci_physfn(dev);
satcu = dmar_find_matched_satc_unit(dev);
@ -2728,11 +2729,11 @@ static int dmar_ats_supported(struct pci_dev *dev, struct intel_iommu *iommu)
bridge = bus->self;
/* If it's an integrated device, allow ATS */
if (!bridge)
return 1;
return true;
/* Connected via non-PCIe: no ATS */
if (!pci_is_pcie(bridge) ||
pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE)
return 0;
return false;
/* If we found the root port, look it up in the ATSR */
if (pci_pcie_type(bridge) == PCI_EXP_TYPE_ROOT_PORT)
break;
@ -2751,11 +2752,11 @@ static int dmar_ats_supported(struct pci_dev *dev, struct intel_iommu *iommu)
if (atsru->include_all)
goto out;
}
ret = 0;
supported = false;
out:
rcu_read_unlock();
return ret;
return supported;
}
int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)