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[v5,08/14] PCI: pci_stub: Suppress kernel DMA ownership auto-claiming

Message ID 20220104015644.2294354-9-baolu.lu@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series Fix BUG_ON in vfio_iommu_group_notifier() | expand

Commit Message

Baolu Lu Jan. 4, 2022, 1:56 a.m. UTC 
The pci_dma_configure() marks the iommu_group as containing only devices
with kernel drivers that manage DMA. Avoid this default behavior for the
pci_stub because it does not program any DMA itself.  This allows the
pci_stub still able to be used by the admin to block driver binding after
applying the DMA ownership to vfio.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
 drivers/pci/pci-stub.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/drivers/pci/pci-stub.c b/drivers/pci/pci-stub.c
index e408099fea52..1f4c0a58b819 100644
--- a/drivers/pci/pci-stub.c
+++ b/drivers/pci/pci-stub.c
@@ -36,6 +36,7 @@  static struct pci_driver stub_driver = {
 	.name		= "pci-stub",
 	.id_table	= NULL,	/* only dynamic id's */
 	.probe		= pci_stub_probe,
+	.no_kernel_api_dma = true,
 };
 
 static int __init pci_stub_init(void)