The port's config space may be reset after a link reset, which is often
implementated as a secondary bus reset. We need to restore the config
space in order for downstream devices to successfully use it.
Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
---
drivers/pci/pcie/portdrv_pci.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index b1deab941f68..7b5b3d7ded5b 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -174,7 +174,9 @@ static int slot_reset_iter(struct device *device, void *data)
static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev)
{
+ pci_restore_state(dev);
device_for_each_child(&dev->dev, dev, slot_reset_iter);
+ pci_save_state(dev);
return PCI_ERS_RESULT_RECOVERED;
}
--
2.14.4
