PCI: pciehp: Handle interrupts that happen during initialization.

Move the enabling of interrupts after all of the data structures
are setup so that we can safely run the interrupt handler as
soon as it is registered.

Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Tested-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: Jesse Barnes <jbarnes@hobbes.lan>

1 files changed, 7 insertions, 8 deletions

diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 71a8012886b0..7a16c6897bb9 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -934,7 +934,7 @@ static void pcie_disable_notification(struct controller *ctrl)
                 ctrl_warn(ctrl, "Cannot disable software notification\n");
 }
 
-static int pcie_init_notification(struct controller *ctrl)
+int pcie_init_notification(struct controller *ctrl)
 {
         if (pciehp_request_irq(ctrl))
                 return -1;
@@ -942,13 +942,17 @@ static int pcie_init_notification(struct controller *ctrl)
                 pciehp_free_irq(ctrl);
                 return -1;
         }
+        ctrl->notification_enabled = 1;
         return 0;
 }
 
 static void pcie_shutdown_notification(struct controller *ctrl)
 {
-        pcie_disable_notification(ctrl);
-        pciehp_free_irq(ctrl);
+        if (ctrl->notification_enabled) {
+                pcie_disable_notification(ctrl);
+                pciehp_free_irq(ctrl);
+                ctrl->notification_enabled = 0;
+        }
 }
 
 static int pcie_init_slot(struct controller *ctrl)
@@ -1110,13 +1114,8 @@ struct controller *pcie_init(struct pcie_device *dev)
         if (pcie_init_slot(ctrl))
                 goto abort_ctrl;
 
-        if (pcie_init_notification(ctrl))
-                goto abort_slot;
-
         return ctrl;
 
-abort_slot:
-        pcie_cleanup_slot(ctrl);
 abort_ctrl:
         kfree(ctrl);
 abort: