From 34d773f6ca5b4b5b1961836b557d34314226aa23 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Mon, 16 Oct 2017 16:18:02 -0700 Subject: [PATCH] PCI: cpqphp: Convert timers to use timer_setup() In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. This has the result of fixing pushbutton_helper_thread(), which was truncating the event pointer to 32 bits. Signed-off-by: Kees Cook Signed-off-by: Bjorn Helgaas Cc: Ingo Molnar Cc: Arvind Yadav Cc: Quentin Lambert Cc: Aleksandr Bezzubikov Cc: "Michael S. Tsirkin" Cc: Marcel Apfelbaum --- drivers/pci/hotplug/cpqphp.h | 2 +- drivers/pci/hotplug/cpqphp_core.c | 3 +-- drivers/pci/hotplug/cpqphp_ctrl.c | 19 ++++++++++--------- 3 files changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/pci/hotplug/cpqphp.h b/drivers/pci/hotplug/cpqphp.h index 48c8a066a6b7..c2bbe6b65d06 100644 --- a/drivers/pci/hotplug/cpqphp.h +++ b/drivers/pci/hotplug/cpqphp.h @@ -410,7 +410,7 @@ void cpqhp_create_debugfs_files(struct controller *ctrl); void cpqhp_remove_debugfs_files(struct controller *ctrl); /* controller functions */ -void cpqhp_pushbutton_thread(unsigned long event_pointer); +void cpqhp_pushbutton_thread(struct timer_list *t); irqreturn_t cpqhp_ctrl_intr(int IRQ, void *data); int cpqhp_find_available_resources(struct controller *ctrl, void __iomem *rom_start); diff --git a/drivers/pci/hotplug/cpqphp_core.c b/drivers/pci/hotplug/cpqphp_core.c index 4d06b8461255..70967ac75265 100644 --- a/drivers/pci/hotplug/cpqphp_core.c +++ b/drivers/pci/hotplug/cpqphp_core.c @@ -661,9 +661,8 @@ static int ctrl_slot_setup(struct controller *ctrl, slot->p_sm_slot = slot_entry; - init_timer(&slot->task_event); + timer_setup(&slot->task_event, cpqhp_pushbutton_thread, 0); slot->task_event.expires = jiffies + 5 * HZ; - slot->task_event.function = cpqhp_pushbutton_thread; /*FIXME: these capabilities aren't used but if they are * they need to be correctly implemented diff --git a/drivers/pci/hotplug/cpqphp_ctrl.c b/drivers/pci/hotplug/cpqphp_ctrl.c index a55653b54eed..a93069e739cb 100644 --- a/drivers/pci/hotplug/cpqphp_ctrl.c +++ b/drivers/pci/hotplug/cpqphp_ctrl.c @@ -47,7 +47,7 @@ static void interrupt_event_handler(struct controller *ctrl); static struct task_struct *cpqhp_event_thread; -static unsigned long pushbutton_pending; /* = 0 */ +static struct timer_list *pushbutton_pending; /* = NULL */ /* delay is in jiffies to wait for */ static void long_delay(int delay) @@ -1732,9 +1732,10 @@ static u32 remove_board(struct pci_func *func, u32 replace_flag, struct controll return 0; } -static void pushbutton_helper_thread(unsigned long data) +static void pushbutton_helper_thread(struct timer_list *t) { - pushbutton_pending = data; + pushbutton_pending = t; + wake_up_process(cpqhp_event_thread); } @@ -1883,13 +1884,13 @@ static void interrupt_event_handler(struct controller *ctrl) wait_for_ctrl_irq(ctrl); mutex_unlock(&ctrl->crit_sect); - init_timer(&p_slot->task_event); + timer_setup(&p_slot->task_event, + pushbutton_helper_thread, + 0); p_slot->hp_slot = hp_slot; p_slot->ctrl = ctrl; /* p_slot->physical_slot = physical_slot; */ p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */ - p_slot->task_event.function = pushbutton_helper_thread; - p_slot->task_event.data = (u32) p_slot; dbg("add_timer p_slot = %p\n", p_slot); add_timer(&p_slot->task_event); @@ -1920,15 +1921,15 @@ static void interrupt_event_handler(struct controller *ctrl) * Scheduled procedure to handle blocking stuff for the pushbuttons. * Handles all pending events and exits. */ -void cpqhp_pushbutton_thread(unsigned long slot) +void cpqhp_pushbutton_thread(struct timer_list *t) { u8 hp_slot; u8 device; struct pci_func *func; - struct slot *p_slot = (struct slot *) slot; + struct slot *p_slot = from_timer(p_slot, t, task_event); struct controller *ctrl = (struct controller *) p_slot->ctrl; - pushbutton_pending = 0; + pushbutton_pending = NULL; hp_slot = p_slot->hp_slot; device = p_slot->device;