[PATCH v4 03/16] iommu/s390: Fail probe for non-PCI devices

From: Robin Murphy
Date: Mon Aug 15 2022 - 12:20:46 EST


From: Matthew Rosato <mjrosato@xxxxxxxxxxxxx>

s390-iommu only supports pci_bus_type today.

Tested-by: Niklas Schnelle <schnelle@xxxxxxxxxxxxx>
Signed-off-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx>
Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx>
---

v4: New

drivers/iommu/s390-iommu.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c
index c898bcbbce11..8158a4ed0c60 100644
--- a/drivers/iommu/s390-iommu.c
+++ b/drivers/iommu/s390-iommu.c
@@ -185,7 +185,12 @@ static void s390_iommu_detach_device(struct iommu_domain *domain,

static struct iommu_device *s390_iommu_probe_device(struct device *dev)
{
- struct zpci_dev *zdev = to_zpci_dev(dev);
+ struct zpci_dev *zdev;
+
+ if (!dev_is_pci(dev))
+ return ERR_PTR(-ENODEV);
+
+ zdev = to_zpci_dev(dev);

return &zdev->iommu_dev;
}
--
2.36.1.dirty