vlib: do not unbind devices already bound to vfio-pci

Change-Id: I739bed5b9d9504d18ee88206e29ebc4ba1b47d28
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/vlib/pci/linux_pci.c b/src/vlib/pci/linux_pci.c
index f9ee47ac..d43361aa 100644
--- a/src/vlib/pci/linux_pci.c
+++ b/src/vlib/pci/linux_pci.c
@@ -109,6 +109,11 @@ vlib_pci_bind_to_uio (vlib_pci_device_t * d, char *uio_driver_name)
     goto done;
   vec_reset_length (s);
 
+  s = format (s, "%v/iommu_group%c", dev_dir_name, 0);
+  if (access ((char *) s, F_OK) == 0)
+    goto done;
+  vec_reset_length (s);
+
   /* walk trough all linux interfaces and if interface belonging to
      this device is founf check if interface is admin up  */
   dir = opendir ("/sys/class/net");