1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 40fb12288ce2..26a06b801b5b 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -1194,13 +1194,15 @@ EXPORT_SYMBOL_GPL(subsys_interface_register);
 
 void subsys_interface_unregister(struct subsys_interface *sif)
 {
-        struct bus_type *subsys = sif->subsys;
+        struct bus_type *subsys;
         struct subsys_dev_iter iter;
         struct device *dev;
 
-        if (!sif)
+        if (!sif || !sif->subsys)
                 return;
 
+        subsys = sif->subsys;
+
         mutex_lock(&subsys->p->mutex);
         list_del_init(&sif->node);
         if (sif->remove_dev) {