Currently, pciehp_resume() try to hot add device if the slot adapter
status return true. But if there are already some devices exist,
namely list_empty(bus->devices) return false. We should not add the device
again, because the device add action will fail. Also print some uncomfortable
messages like this:
pciehp 0000:00:1c.1:pcie04: Device 0000:03:00.0 already exists at
0000:03:00, cannot hot-add
pciehp 0000:00:1c.1:pcie04: Cannot add device at 0000:03:00
Signed-off-by: Yijing Wang <[email protected]>
Cc: Paul Bolle <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Oliver Neukum <[email protected]>
Cc: Gu Zheng <[email protected]>
Cc: [email protected]
---
drivers/pci/hotplug/pciehp_core.c | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/hotplug/pciehp_core.c
b/drivers/pci/hotplug/pciehp_core.c
index 7d72c5e..1542735 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -300,6 +300,7 @@ static int pciehp_resume (struct pcie_device *dev)
{
struct controller *ctrl;
struct slot *slot;
+ struct pci_bus *pbus = dev->port->subordinate;
u8 status;
ctrl = get_service_data(dev);
@@ -311,10 +312,12 @@ static int pciehp_resume (struct pcie_device *dev)
/* Check if slot is occupied */
pciehp_get_adapter_status(slot, &status);
- if (status)
- pciehp_enable_slot(slot);
- else
+ if (status) {
+ if (list_empty(&pbus->devices))
+ pciehp_enable_slot(slot);
+ } else if (!list_empty(&pbus->devices))
pciehp_disable_slot(slot);
+
return 0;
}
#endif /* PM */
--
1.7.1
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