733 	struct sysrq_state *sysrq =  in sysrq_reinject_alt_sysrq()  local
735 	struct input_handle *handle = &sysrq->handle;  in sysrq_reinject_alt_sysrq()
736 	unsigned int alt_code = sysrq->alt_use;  in sysrq_reinject_alt_sysrq()
738 	if (sysrq->need_reinject) {  in sysrq_reinject_alt_sysrq()
740 		sysrq->reinjecting = true;  in sysrq_reinject_alt_sysrq()
753 		sysrq->reinjecting = false;  in sysrq_reinject_alt_sysrq()
757 static bool sysrq_handle_keypress(struct sysrq_state *sysrq,  in sysrq_handle_keypress()  argument
760 	bool was_active = sysrq->active;  in sysrq_handle_keypress()
769 			if (sysrq->active && code == sysrq->alt_use)  in sysrq_handle_keypress()
770 				sysrq->active = false;  in sysrq_handle_keypress()
772 			sysrq->alt = KEY_RESERVED;  in sysrq_handle_keypress()
775 			sysrq->alt = code;  in sysrq_handle_keypress()
776 			sysrq->need_reinject = false;  in sysrq_handle_keypress()
781 		if (value == 1 && sysrq->alt != KEY_RESERVED) {  in sysrq_handle_keypress()
782 			sysrq->active = true;  in sysrq_handle_keypress()
783 			sysrq->alt_use = sysrq->alt;  in sysrq_handle_keypress()
788 			sysrq->need_reinject = true;  in sysrq_handle_keypress()
799 		if (sysrq->active)  in sysrq_handle_keypress()
800 			clear_bit(KEY_SYSRQ, sysrq->handle.dev->key);  in sysrq_handle_keypress()
805 		if (sysrq->active && value && value != 2) {  in sysrq_handle_keypress()
806 			sysrq->need_reinject = false;  in sysrq_handle_keypress()
812 	suppress = sysrq->active;  in sysrq_handle_keypress()
814 	if (!sysrq->active) {  in sysrq_handle_keypress()
819 		if (sysrq->reset_seq_version != sysrq_reset_seq_version)  in sysrq_handle_keypress()
820 			sysrq_parse_reset_sequence(sysrq);  in sysrq_handle_keypress()
828 			set_bit(code, sysrq->key_down);  in sysrq_handle_keypress()
830 			clear_bit(code, sysrq->key_down);  in sysrq_handle_keypress()
833 			schedule_work(&sysrq->reinject_work);  in sysrq_handle_keypress()
836 		sysrq_detect_reset_sequence(sysrq, code, value);  in sysrq_handle_keypress()
838 	} else if (value == 0 && test_and_clear_bit(code, sysrq->key_down)) {  in sysrq_handle_keypress()
852 	struct sysrq_state *sysrq = handle->private;  in sysrq_filter()  local
859 	if (sysrq->reinjecting)  in sysrq_filter()
869 		suppress = sysrq_handle_keypress(sysrq, code, value);  in sysrq_filter()
873 		suppress = sysrq->active;  in sysrq_filter()
884 	struct sysrq_state *sysrq;  in sysrq_connect()  local
887 	sysrq = kzalloc(sizeof(struct sysrq_state), GFP_KERNEL);  in sysrq_connect()
888 	if (!sysrq)  in sysrq_connect()
891 	INIT_WORK(&sysrq->reinject_work, sysrq_reinject_alt_sysrq);  in sysrq_connect()
893 	sysrq->handle.dev = dev;  in sysrq_connect()
894 	sysrq->handle.handler = handler;  in sysrq_connect()
895 	sysrq->handle.name = "sysrq";  in sysrq_connect()
896 	sysrq->handle.private = sysrq;  in sysrq_connect()
897 	setup_timer(&sysrq->keyreset_timer,  in sysrq_connect()
898 		    sysrq_do_reset, (unsigned long)sysrq);  in sysrq_connect()
900 	error = input_register_handle(&sysrq->handle);  in sysrq_connect()
907 	error = input_open_device(&sysrq->handle);  in sysrq_connect()
916 	input_unregister_handle(&sysrq->handle);  in sysrq_connect()
918 	kfree(sysrq);  in sysrq_connect()
924 	struct sysrq_state *sysrq = handle->private;  in sysrq_disconnect()  local
927 	cancel_work_sync(&sysrq->reinject_work);  in sysrq_disconnect()
928 	del_timer_sync(&sysrq->keyreset_timer);  in sysrq_disconnect()
930 	kfree(sysrq);  in sysrq_disconnect()