Use the PM runtime methods to wake up the bridges before accessing
their config space.
Signed-off-by: Sergey Miroshnichenko <s.miroshnichenko@xxxxxxxxx>
---
drivers/pci/probe.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 4726049a19ad..a80978906ac3 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -3199,6 +3199,8 @@ static void pci_bus_rescan_prepare(struct pci_bus *bus)
{
struct pci_dev *dev;
+ pm_runtime_get_sync(&bus->dev);
+
list_for_each_entry(dev, &bus->devices, bus_list) {
struct pci_bus *child = dev->subordinate;
@@ -3242,6 +3244,8 @@ static void pci_bus_rescan_done(struct pci_bus *bus)
dev->driver->rescan_done(dev);
}
}
+
+ pm_runtime_put(&bus->dev);
}
static void pci_setup_bridges(struct pci_bus *bus)
--
2.20.1
