1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/pci/pci-stub.c b/drivers/pci/pci-stub.c
index f7b68ca6cc98..4c0336b31caf 100644
--- a/drivers/pci/pci-stub.c
+++ b/drivers/pci/pci-stub.c
@@ -47,6 +47,10 @@ static int __init pci_stub_init(void)
         if (rc)
                 return rc;
 
+        /* no ids passed actually */
+        if (ids[0] == '\0')
+                return 0;
+
         /* add ids specified in the module parameter */
         p = ids;
         while ((id = strsep(&p, ","))) {