From 50b52fdee050745935d92e7026373edea2647e60 Mon Sep 17 00:00:00 2001 From: Rajat Jain Date: Tue, 4 Feb 2014 18:31:11 -0800 Subject: PCI: pciehp: Add hotplug_lock to serialize hotplug events Today it is there is no protection around pciehp_enable_slot() and pciehp_disable_slot() to ensure that they complete before another hot-plug operation can be done on that particular slot. This patch introduces the slot->hotplug_lock to ensure that any hotplug operations (add / remove) complete before another hotplug event can begin processing on that particular slot. Signed-off-by: Rajat Jain Signed-off-by: Rajat Jain Signed-off-by: Guenter Roeck Signed-off-by: Bjorn Helgaas --- drivers/pci/hotplug/pciehp_hpc.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/pci/hotplug/pciehp_hpc.c') diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index 6433e73aa2df..da4b0204b4f7 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -686,6 +686,7 @@ static int pcie_init_slot(struct controller *ctrl) slot->ctrl = ctrl; mutex_init(&slot->lock); + mutex_init(&slot->hotplug_lock); INIT_DELAYED_WORK(&slot->work, pciehp_queue_pushbutton_work); ctrl->slot = slot; return 0; -- cgit v1.2.3