[PATCH v2 01/14] iommu/vt-d: Temporarily reject probing non-PCI devices

[Robin Murphy]

Although the driver has some support implemented for non-PCI devices via
ANDD, it only registers itself for pci_bus_type, so has never actually
seen probe_device for a non-PCI device. Once the bus details move into
the IOMMU core, it appears there may be some issues with correctly
rejecting non-ANDD platform devices, so let's temporarily enforce the
current behaviour of only considering PCI devices until that can be
investigated properly.

Reported-by: Lu Baolu <baolu.lu at linux.intel.com>
Signed-off-by: Robin Murphy <robin.murphy at arm.com>
---
 drivers/iommu/intel/iommu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 0edf6084dc14..9507b64fdf6b 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -4565,6 +4565,10 @@ static struct iommu_device *intel_iommu_probe_device(struct device *dev)
 	unsigned long flags;
 	u8 bus, devfn;
 
+	/* ANDD platform device support needs fixing */
+	if (!pdev)
+		return ERR_PTR(-ENODEV);
+
 	iommu = device_to_iommu(dev, &bus, &devfn);
 	if (!iommu)
 		return ERR_PTR(-ENODEV);
-- 
2.35.3.dirty