1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 1cdc2c9547a7..65df6d2ac003 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -165,6 +165,22 @@ static inline void pci_wakeup_event(struct pci_dev *dev)
 	pm_wakeup_event(&dev->dev, 100);
 }
 
+/**
+ * pci_bar_index_is_valid - Check whether a BAR index is within valid range
+ * @bar: BAR index
+ *
+ * Protects against overflowing &struct pci_dev.resource array.
+ *
+ * Return: true for valid index, false otherwise.
+ */
+static inline bool pci_bar_index_is_valid(int bar)
+{
+	if (bar >= 0 && bar < PCI_NUM_RESOURCES)
+		return true;
+
+	return false;
+}
+
 static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
 {
 	return !!(pci_dev->subordinate);