vfio: initialize the virqfd workqueue in VFIO generic code

Now we have finally completely decoupled virqfd from VFIO_PCI. We can
initialize it from the VFIO generic code, in order to safely use it from
multiple independent VFIO bus drivers.

Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com>
Signed-off-by: Baptiste Reynal <b.reynal@virtualopensystems.com>
Reviewed-by: Eric Auger <eric.auger@linaro.org>
Tested-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 4cde85501444..23ba12afe01f 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -1553,6 +1553,11 @@ static int __init vfio_init(void)
         if (ret)
                 goto err_cdev_add;
 
+        /* Start the virqfd cleanup handler used by some VFIO bus drivers */
+        ret = vfio_virqfd_init();
+        if (ret)
+                goto err_virqfd;
+
         pr_info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
 
         /*
@@ -1565,6 +1570,8 @@ static int __init vfio_init(void)
 
         return 0;
 
+err_virqfd:
+        cdev_del(&vfio.group_cdev);
 err_cdev_add:
         unregister_chrdev_region(vfio.group_devt, MINORMASK);
 err_alloc_chrdev:
@@ -1579,6 +1586,7 @@ static void __exit vfio_cleanup(void)
 {
         WARN_ON(!list_empty(&vfio.group_list));
 
+        vfio_virqfd_exit();
         idr_destroy(&vfio.group_idr);
         cdev_del(&vfio.group_cdev);
         unregister_chrdev_region(vfio.group_devt, MINORMASK);