vhost: fix release path lockdep checks

We shouldn't hold any locks on release path. Pass a flag to
vhost_dev_cleanup to use the lockdep info correctly.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Sasha Levin <levinsasha928@gmail.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index ae66278e4dcf..385d8ee0d2d1 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -405,7 +405,7 @@ long vhost_dev_reset_owner(struct vhost_dev *dev)
         if (!memory)
                 return -ENOMEM;
 
-        vhost_dev_cleanup(dev);
+        vhost_dev_cleanup(dev, true);
 
         memory->nregions = 0;
         RCU_INIT_POINTER(dev->memory, memory);
@@ -436,8 +436,8 @@ int vhost_zerocopy_signal_used(struct vhost_virtqueue *vq)
         return j;
 }
 
-/* Caller should have device mutex */
-void vhost_dev_cleanup(struct vhost_dev *dev)
+/* Caller should have device mutex if and only if locked is set */
+void vhost_dev_cleanup(struct vhost_dev *dev, bool locked)
 {
         int i;
 
@@ -474,7 +474,8 @@ void vhost_dev_cleanup(struct vhost_dev *dev)
         dev->log_file = NULL;
         /* No one will access memory at this point */
         kfree(rcu_dereference_protected(dev->memory,
-                                        lockdep_is_held(&dev->mutex)));
+                                        locked ==
+                                                lockdep_is_held(&dev->mutex)));
         RCU_INIT_POINTER(dev->memory, NULL);
         WARN_ON(!list_empty(&dev->work_list));
         if (dev->worker) {