pci:map bar should not be zaro len

Signed-off-by: lipengfei28 <[email protected]>
apache · Nov 28, 2024 · 21343f6 · 21343f6
1 parent 6dcc1d1
commit 21343f6
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
@@ -1694,6 +1694,12 @@ FAR void *pci_map_bar_region(FAR struct pci_device_s *dev, int bar,
                              uintptr_t offset, size_t length)
 {
   uintptr_t start = pci_resource_start(dev, bar) + offset;
+
+  if (pci_resource_len(dev, bar) == 0)
+    {
+      return NULL;
+    }
+
   return pci_map_region(dev, start, length);
 }