723 	struct sysrq_state *sysrq =  in sysrq_reinject_alt_sysrq()  local
725 	struct input_handle *handle = &sysrq->handle;  in sysrq_reinject_alt_sysrq()
726 	unsigned int alt_code = sysrq->alt_use;  in sysrq_reinject_alt_sysrq()
728 	if (sysrq->need_reinject) {  in sysrq_reinject_alt_sysrq()
730 		sysrq->reinjecting = true;  in sysrq_reinject_alt_sysrq()
743 		sysrq->reinjecting = false;  in sysrq_reinject_alt_sysrq()
747 static bool sysrq_handle_keypress(struct sysrq_state *sysrq,  in sysrq_handle_keypress()  argument
750 	bool was_active = sysrq->active;  in sysrq_handle_keypress()
759 			if (sysrq->active && code == sysrq->alt_use)  in sysrq_handle_keypress()
760 				sysrq->active = false;  in sysrq_handle_keypress()
762 			sysrq->alt = KEY_RESERVED;  in sysrq_handle_keypress()
765 			sysrq->alt = code;  in sysrq_handle_keypress()
766 			sysrq->need_reinject = false;  in sysrq_handle_keypress()
771 		if (value == 1 && sysrq->alt != KEY_RESERVED) {  in sysrq_handle_keypress()
772 			sysrq->active = true;  in sysrq_handle_keypress()
773 			sysrq->alt_use = sysrq->alt;  in sysrq_handle_keypress()
778 			sysrq->need_reinject = true;  in sysrq_handle_keypress()
789 		if (sysrq->active)  in sysrq_handle_keypress()
790 			clear_bit(KEY_SYSRQ, sysrq->handle.dev->key);  in sysrq_handle_keypress()
795 		if (sysrq->active && value && value != 2) {  in sysrq_handle_keypress()
796 			sysrq->need_reinject = false;  in sysrq_handle_keypress()
802 	suppress = sysrq->active;  in sysrq_handle_keypress()
804 	if (!sysrq->active) {  in sysrq_handle_keypress()
809 		if (sysrq->reset_seq_version != sysrq_reset_seq_version)  in sysrq_handle_keypress()
810 			sysrq_parse_reset_sequence(sysrq);  in sysrq_handle_keypress()
818 			set_bit(code, sysrq->key_down);  in sysrq_handle_keypress()
820 			clear_bit(code, sysrq->key_down);  in sysrq_handle_keypress()
823 			schedule_work(&sysrq->reinject_work);  in sysrq_handle_keypress()
826 		sysrq_detect_reset_sequence(sysrq, code, value);  in sysrq_handle_keypress()
828 	} else if (value == 0 && test_and_clear_bit(code, sysrq->key_down)) {  in sysrq_handle_keypress()
842 	struct sysrq_state *sysrq = handle->private;  in sysrq_filter()  local
849 	if (sysrq->reinjecting)  in sysrq_filter()
859 		suppress = sysrq_handle_keypress(sysrq, code, value);  in sysrq_filter()
863 		suppress = sysrq->active;  in sysrq_filter()
874 	struct sysrq_state *sysrq;  in sysrq_connect()  local
877 	sysrq = kzalloc(sizeof(struct sysrq_state), GFP_KERNEL);  in sysrq_connect()
878 	if (!sysrq)  in sysrq_connect()
881 	INIT_WORK(&sysrq->reinject_work, sysrq_reinject_alt_sysrq);  in sysrq_connect()
883 	sysrq->handle.dev = dev;  in sysrq_connect()
884 	sysrq->handle.handler = handler;  in sysrq_connect()
885 	sysrq->handle.name = "sysrq";  in sysrq_connect()
886 	sysrq->handle.private = sysrq;  in sysrq_connect()
887 	setup_timer(&sysrq->keyreset_timer,  in sysrq_connect()
888 		    sysrq_do_reset, (unsigned long)sysrq);  in sysrq_connect()
890 	error = input_register_handle(&sysrq->handle);  in sysrq_connect()
897 	error = input_open_device(&sysrq->handle);  in sysrq_connect()
906 	input_unregister_handle(&sysrq->handle);  in sysrq_connect()
908 	kfree(sysrq);  in sysrq_connect()
914 	struct sysrq_state *sysrq = handle->private;  in sysrq_disconnect()  local
917 	cancel_work_sync(&sysrq->reinject_work);  in sysrq_disconnect()
918 	del_timer_sync(&sysrq->keyreset_timer);  in sysrq_disconnect()
920 	kfree(sysrq);  in sysrq_disconnect()