diff --git a/kernel/driver/pci/pci.c b/kernel/driver/pci/pci.c
index e2ca3644..a1538493 100644
--- a/kernel/driver/pci/pci.c
+++ b/kernel/driver/pci/pci.c
@@ -525,12 +525,11 @@ int32_t pci_enumerate_capability_list(struct pci_device_structure_header_t *pci_
     while (1)
     {
         tmp = pci_read_config(pci_dev->bus, pci_dev->device, pci_dev->func, cap_offset);
-        kdebug("tmp & 0xff=%#010lx",tmp & 0xff);
         if ((tmp & 0xff) != cap_type)
         {
-            if ((tmp & 0xff00) >> 8)
+            if (((tmp & 0xff00) >> 8))
             {
-                cap_offset = (tmp & 0xff00);
+                cap_offset = (tmp & 0xff00)>>8;
                 continue;
             }
             else