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[RFC,v3,1/5] PCI: Handle NULL value inside pci_upstream_bridge()

Message ID 20211106175503.27178-2-refactormyself@gmail.com (mailing list archive)
State Superseded
Delegated to: Bjorn Helgaas
Headers show
Series Remove unncessary linked list from aspm.c | expand

Commit Message

Saheed O. Bolarinwa Nov. 6, 2021, 5:54 p.m. UTC 
Return NULL if a NULL pointer is passed into pci_upstream_bridge().

Signed-off-by: Saheed O. Bolarinwa <refactormyself@gmail.com>
---
 include/linux/pci.h | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/include/linux/pci.h b/include/linux/pci.h
index cd8aa6fce204..b087e0b9814e 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -695,6 +695,9 @@  static inline bool pci_is_bridge(struct pci_dev *dev)
 
 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
 {
+	if (!dev)
+		return NULL;
+
 	dev = pci_physfn(dev);
 	if (pci_is_root_bus(dev->bus))
 		return NULL;