From: Peter Zijlstra Date: Fri, 18 Apr 2008 04:25:38 +0000 (-0400) Subject: Input: mac_hid - add lockdep annotation to emumousebtn X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8fd76c4506817a93718fab0d6b3a55b9becc9f2c;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git Input: mac_hid - add lockdep annotation to emumousebtn The mouse button emulation calls input device methods from an input device. This causes funny lock nesting which is harmless as each device has its own locks. Give the nesting device its own lock classes so that lockdep will not consider them the same. Signed-off-by: Peter Zijlstra Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/macintosh/mac_hid.c b/drivers/macintosh/mac_hid.c index 89302309da9..f972ff377b6 100644 --- a/drivers/macintosh/mac_hid.c +++ b/drivers/macintosh/mac_hid.c @@ -103,6 +103,9 @@ int mac_hid_mouse_emulate_buttons(int caller, unsigned int keycode, int down) return 0; } +static struct lock_class_key emumousebtn_event_class; +static struct lock_class_key emumousebtn_mutex_class; + static int emumousebtn_input_register(void) { int ret; @@ -111,6 +114,9 @@ static int emumousebtn_input_register(void) if (!emumousebtn) return -ENOMEM; + lockdep_set_class(emumousebtn->event_lock, &emumousebtn_event_class); + lockdep_set_class(emumousebtn->mutex, &emumousebtn_mutex_class); + emumousebtn->name = "Macintosh mouse button emulation"; emumousebtn->id.bustype = BUS_ADB; emumousebtn->id.vendor = 0x0001;