792 	struct sysrq_state *sysrq =  in sysrq_reinject_alt_sysrq()  local
794 	struct input_handle *handle = &sysrq->handle;  in sysrq_reinject_alt_sysrq()
795 	unsigned int alt_code = sysrq->alt_use;  in sysrq_reinject_alt_sysrq()
797 	if (sysrq->need_reinject) {  in sysrq_reinject_alt_sysrq()
799 		sysrq->reinjecting = true;  in sysrq_reinject_alt_sysrq()
812 		sysrq->reinjecting = false;  in sysrq_reinject_alt_sysrq()
816 static bool sysrq_handle_keypress(struct sysrq_state *sysrq,  in sysrq_handle_keypress()  argument
819 	bool was_active = sysrq->active;  in sysrq_handle_keypress()
828 			if (sysrq->active && code == sysrq->alt_use)  in sysrq_handle_keypress()
829 				sysrq->active = false;  in sysrq_handle_keypress()
831 			sysrq->alt = KEY_RESERVED;  in sysrq_handle_keypress()
834 			sysrq->alt = code;  in sysrq_handle_keypress()
835 			sysrq->need_reinject = false;  in sysrq_handle_keypress()
842 			sysrq->shift = KEY_RESERVED;  in sysrq_handle_keypress()
844 			sysrq->shift = code;  in sysrq_handle_keypress()
848 		if (value == 1 && sysrq->alt != KEY_RESERVED) {  in sysrq_handle_keypress()
849 			sysrq->active = true;  in sysrq_handle_keypress()
850 			sysrq->alt_use = sysrq->alt;  in sysrq_handle_keypress()
852 			sysrq->shift_use = sysrq->shift;  in sysrq_handle_keypress()
857 			sysrq->need_reinject = true;  in sysrq_handle_keypress()
868 		if (sysrq->active)  in sysrq_handle_keypress()
869 			clear_bit(KEY_SYSRQ, sysrq->handle.dev->key);  in sysrq_handle_keypress()
874 		if (sysrq->active && value && value != 2) {  in sysrq_handle_keypress()
877 			sysrq->need_reinject = false;  in sysrq_handle_keypress()
878 			if (sysrq->shift_use != KEY_RESERVED)  in sysrq_handle_keypress()
885 	suppress = sysrq->active;  in sysrq_handle_keypress()
887 	if (!sysrq->active) {  in sysrq_handle_keypress()
892 		if (sysrq->reset_seq_version != sysrq_reset_seq_version)  in sysrq_handle_keypress()
893 			sysrq_parse_reset_sequence(sysrq);  in sysrq_handle_keypress()
901 			set_bit(code, sysrq->key_down);  in sysrq_handle_keypress()
903 			clear_bit(code, sysrq->key_down);  in sysrq_handle_keypress()
906 			schedule_work(&sysrq->reinject_work);  in sysrq_handle_keypress()
909 		sysrq_detect_reset_sequence(sysrq, code, value);  in sysrq_handle_keypress()
911 	} else if (value == 0 && test_and_clear_bit(code, sysrq->key_down)) {  in sysrq_handle_keypress()
925 	struct sysrq_state *sysrq = handle->private;  in sysrq_filter()  local
932 	if (sysrq->reinjecting)  in sysrq_filter()
942 		suppress = sysrq_handle_keypress(sysrq, code, value);  in sysrq_filter()
946 		suppress = sysrq->active;  in sysrq_filter()
957 	struct sysrq_state *sysrq;  in sysrq_connect()  local
960 	sysrq = kzalloc(sizeof(struct sysrq_state), GFP_KERNEL);  in sysrq_connect()
961 	if (!sysrq)  in sysrq_connect()
964 	INIT_WORK(&sysrq->reinject_work, sysrq_reinject_alt_sysrq);  in sysrq_connect()
966 	sysrq->handle.dev = dev;  in sysrq_connect()
967 	sysrq->handle.handler = handler;  in sysrq_connect()
968 	sysrq->handle.name = "sysrq";  in sysrq_connect()
969 	sysrq->handle.private = sysrq;  in sysrq_connect()
970 	timer_setup(&sysrq->keyreset_timer, sysrq_do_reset, 0);  in sysrq_connect()
972 	error = input_register_handle(&sysrq->handle);  in sysrq_connect()
979 	error = input_open_device(&sysrq->handle);  in sysrq_connect()
988 	input_unregister_handle(&sysrq->handle);  in sysrq_connect()
990 	kfree(sysrq);  in sysrq_connect()
996 	struct sysrq_state *sysrq = handle->private;  in sysrq_disconnect()  local
999 	cancel_work_sync(&sysrq->reinject_work);  in sysrq_disconnect()
1000 	del_timer_sync(&sysrq->keyreset_timer);  in sysrq_disconnect()
1002 	kfree(sysrq);  in sysrq_disconnect()