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-rw-r--r--include/uapi/linux/vfio.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index ac2329f241417a..bb7b89330d359c 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -964,6 +964,10 @@ struct vfio_device_bind_iommufd {
* hwpt corresponding to the given pt_id.
*
* Return: 0 on success, -errno on failure.
+ *
+ * When a device is resetting, -EBUSY will be returned to reject any concurrent
+ * attachment to the resetting device itself or any sibling device in the IOMMU
+ * group having the resetting device.
*/
struct vfio_device_attach_iommufd_pt {
__u32 argsz;