[PATCH 6/6] PCI/ASPM: Add lockdep assert to link state helper

[Johan Hovold <johan+linaro@kernel.org>]

Add a lockdep assert to the locked disable link state helper which
should only be called with a pci_bus_sem read lock held.

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/pci/pcie/aspm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index 19b7256d2dc9..ef2e7a186f57 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -1090,6 +1090,8 @@ static int __pci_disable_link_state(struct pci_dev *pdev, int state, bool locked
 
 int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
 {
+	lockdep_assert_held_read(&pci_bus_sem);
+
 	return __pci_disable_link_state(pdev, state, true);
 }
 EXPORT_SYMBOL(pci_disable_link_state_locked);
-- 
2.41.0