x86/amd-iommu: Don't detach device from pt domain on driver unbind

This patch makes sure a device is not detached from the passthrough domain when the device driver is unloaded or does otherwise release the device. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
git-mirror · Sep 3, 2009 · a1ca331 · a1ca331
1 parent 21129f7
commit a1ca331
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
@@ -1195,6 +1195,8 @@ static int device_change_notifier(struct notifier_block *nb,
 	case BUS_NOTIFY_UNBOUND_DRIVER:
 		if (!domain)
 			goto out;
+		if (iommu_pass_through)
+			break;
 		detach_device(domain, devid);
 		break;
 	case BUS_NOTIFY_ADD_DEVICE: