[PATCH v2 6/6] PCI/ASPM: Add lockdep assert to link state helper

Johan Hovold
2023-11-28T08:15:39Z

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

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
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 d7a3ca555cc1..5dab531c8654 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