794 	struct sysrq_state *sysrq =  in sysrq_reinject_alt_sysrq()  local
796 	struct input_handle *handle = &sysrq->handle;  in sysrq_reinject_alt_sysrq()
797 	unsigned int alt_code = sysrq->alt_use;  in sysrq_reinject_alt_sysrq()
799 	if (sysrq->need_reinject) {  in sysrq_reinject_alt_sysrq()
801 		sysrq->reinjecting = true;  in sysrq_reinject_alt_sysrq()
814 		sysrq->reinjecting = false;  in sysrq_reinject_alt_sysrq()
818 static bool sysrq_handle_keypress(struct sysrq_state *sysrq,  in sysrq_handle_keypress()  argument
821 	bool was_active = sysrq->active;  in sysrq_handle_keypress()
830 			if (sysrq->active && code == sysrq->alt_use)  in sysrq_handle_keypress()
831 				sysrq->active = false;  in sysrq_handle_keypress()
833 			sysrq->alt = KEY_RESERVED;  in sysrq_handle_keypress()
836 			sysrq->alt = code;  in sysrq_handle_keypress()
837 			sysrq->need_reinject = false;  in sysrq_handle_keypress()
844 			sysrq->shift = KEY_RESERVED;  in sysrq_handle_keypress()
846 			sysrq->shift = code;  in sysrq_handle_keypress()
847 		if (sysrq->active)  in sysrq_handle_keypress()
848 			sysrq->shift_use = sysrq->shift;  in sysrq_handle_keypress()
852 		if (value == 1 && sysrq->alt != KEY_RESERVED) {  in sysrq_handle_keypress()
853 			sysrq->active = true;  in sysrq_handle_keypress()
854 			sysrq->alt_use = sysrq->alt;  in sysrq_handle_keypress()
856 			sysrq->shift_use = sysrq->shift;  in sysrq_handle_keypress()
861 			sysrq->need_reinject = true;  in sysrq_handle_keypress()
872 		if (sysrq->active)  in sysrq_handle_keypress()
873 			clear_bit(KEY_SYSRQ, sysrq->handle.dev->key);  in sysrq_handle_keypress()
878 		if (sysrq->active && value && value != 2) {  in sysrq_handle_keypress()
881 			sysrq->need_reinject = false;  in sysrq_handle_keypress()
882 			if (sysrq->shift_use != KEY_RESERVED)  in sysrq_handle_keypress()
889 	suppress = sysrq->active;  in sysrq_handle_keypress()
891 	if (!sysrq->active) {  in sysrq_handle_keypress()
896 		if (sysrq->reset_seq_version != sysrq_reset_seq_version)  in sysrq_handle_keypress()
897 			sysrq_parse_reset_sequence(sysrq);  in sysrq_handle_keypress()
905 			set_bit(code, sysrq->key_down);  in sysrq_handle_keypress()
907 			clear_bit(code, sysrq->key_down);  in sysrq_handle_keypress()
910 			schedule_work(&sysrq->reinject_work);  in sysrq_handle_keypress()
913 		sysrq_detect_reset_sequence(sysrq, code, value);  in sysrq_handle_keypress()
915 	} else if (value == 0 && test_and_clear_bit(code, sysrq->key_down)) {  in sysrq_handle_keypress()
929 	struct sysrq_state *sysrq = handle->private;  in sysrq_filter()  local
936 	if (sysrq->reinjecting)  in sysrq_filter()
946 		suppress = sysrq_handle_keypress(sysrq, code, value);  in sysrq_filter()
950 		suppress = sysrq->active;  in sysrq_filter()
961 	struct sysrq_state *sysrq;  in sysrq_connect()  local
964 	sysrq = kzalloc(sizeof(struct sysrq_state), GFP_KERNEL);  in sysrq_connect()
965 	if (!sysrq)  in sysrq_connect()
968 	INIT_WORK(&sysrq->reinject_work, sysrq_reinject_alt_sysrq);  in sysrq_connect()
970 	sysrq->handle.dev = dev;  in sysrq_connect()
971 	sysrq->handle.handler = handler;  in sysrq_connect()
972 	sysrq->handle.name = "sysrq";  in sysrq_connect()
973 	sysrq->handle.private = sysrq;  in sysrq_connect()
974 	timer_setup(&sysrq->keyreset_timer, sysrq_do_reset, 0);  in sysrq_connect()
976 	error = input_register_handle(&sysrq->handle);  in sysrq_connect()
983 	error = input_open_device(&sysrq->handle);  in sysrq_connect()
992 	input_unregister_handle(&sysrq->handle);  in sysrq_connect()
994 	kfree(sysrq);  in sysrq_connect()
1000 	struct sysrq_state *sysrq = handle->private;  in sysrq_disconnect()  local
1003 	cancel_work_sync(&sysrq->reinject_work);  in sysrq_disconnect()
1004 	timer_shutdown_sync(&sysrq->keyreset_timer);  in sysrq_disconnect()
1006 	kfree(sysrq);  in sysrq_disconnect()