From a455e2985f57e2a71566bb8850094af38b2c932d Mon Sep 17 00:00:00 2001 From: Peter Popovec Date: Fri, 14 Dec 2012 22:57:25 -0800 Subject: [PATCH] Input: walkera0701 - fix crash on startup The driver's timer must be set up before enabling IRQ handler, otherwise bad things may happen. Reported-and-tested-by: Fengguang Wu Signed-off-by: Peter Popovec CC: stable@vger.kernel.org Signed-off-by: Dmitry Torokhov --- drivers/input/joystick/walkera0701.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/input/joystick/walkera0701.c b/drivers/input/joystick/walkera0701.c index 4dfa1eed4b7..f8f892b076e 100644 --- a/drivers/input/joystick/walkera0701.c +++ b/drivers/input/joystick/walkera0701.c @@ -196,6 +196,7 @@ static void walkera0701_close(struct input_dev *dev) struct walkera_dev *w = input_get_drvdata(dev); parport_disable_irq(w->parport); + hrtimer_cancel(&w->timer); } static int walkera0701_connect(struct walkera_dev *w, int parport) @@ -224,6 +225,9 @@ static int walkera0701_connect(struct walkera_dev *w, int parport) if (parport_claim(w->pardevice)) goto init_err1; + hrtimer_init(&w->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + w->timer.function = timer_handler; + w->input_dev = input_allocate_device(); if (!w->input_dev) goto init_err2; @@ -254,8 +258,6 @@ static int walkera0701_connect(struct walkera_dev *w, int parport) if (err) goto init_err3; - hrtimer_init(&w->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); - w->timer.function = timer_handler; return 0; init_err3: @@ -271,7 +273,6 @@ static int walkera0701_connect(struct walkera_dev *w, int parport) static void walkera0701_disconnect(struct walkera_dev *w) { - hrtimer_cancel(&w->timer); input_unregister_device(w->input_dev); parport_release(w->pardevice); parport_unregister_device(w->pardevice); -- 2.20.1