Fix improper workqueue cleanup.
In the current pciehp, pcied_cleanup() calls destroy_workqueue()
before calling pcie_port_service_unregister(). This causes kernel oops
because flush_workqueue() is called in the pcie_port_service_unregister()
code path after the workqueue was destroyed. So pcied_cleanup() must call
pcie_port_service_unregister() first before calling destroy_workqueue().
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@xxxxxxxxxxxxxx>
---
drivers/pci/hotplug/pciehp_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux-3.1/drivers/pci/hotplug/pciehp_core.c
===================================================================
--- linux-3.1.orig/drivers/pci/hotplug/pciehp_core.c
+++ linux-3.1/drivers/pci/hotplug/pciehp_core.c
@@ -366,9 +366,9 @@ static int __init pcied_init(void)
static void __exit pcied_cleanup(void)
{
dbg("unload_pciehpd()\n");
+ pcie_port_service_unregister(&hpdriver_portdrv);
destroy_workqueue(pciehp_ordered_wq);
destroy_workqueue(pciehp_wq);
- pcie_port_service_unregister(&hpdriver_portdrv);
info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
}
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