[Intel-gfx] [PATCH v1 5/5] vfio: Check the presence for iommufd callbacks in __vfio_register_dev()

[Yi Liu]

After making the no-DMA drivers (samples/vfio-mdev) providing iommufd
callbacks, __vfio_register_dev() should check the presence of the iommufd
callbacks if CONFIG_IOMMUFD is enabled.

Signed-off-by: Yi Liu <yi.l....@intel.com>
---
 drivers/vfio/vfio_main.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c
index 43bd6b76e2b6..89497c933490 100644
--- a/drivers/vfio/vfio_main.c
+++ b/drivers/vfio/vfio_main.c
@@ -255,8 +255,9 @@ static int __vfio_register_dev(struct vfio_device *device,
 {
        int ret;
 
-       if (WARN_ON(device->ops->bind_iommufd &&
-                   (!device->ops->unbind_iommufd ||
+       if (WARN_ON(IS_ENABLED(CONFIG_IOMMUFD) &&
+                   (!device->ops->bind_iommufd ||
+                    !device->ops->unbind_iommufd ||
                     !device->ops->attach_ioas)))
                return -EINVAL;
 
-- 
2.34.1