113 	struct mbox_chan *chan;  in pcc_mbox_request_channel()  local
123 	chan = get_pcc_channel(subspace_id);  in pcc_mbox_request_channel()
125 	if (IS_ERR(chan) || chan->cl) {  in pcc_mbox_request_channel()
130 	spin_lock_irqsave(&chan->lock, flags);  in pcc_mbox_request_channel()
131 	chan->msg_free = 0;  in pcc_mbox_request_channel()
132 	chan->msg_count = 0;  in pcc_mbox_request_channel()
133 	chan->active_req = NULL;  in pcc_mbox_request_channel()
134 	chan->cl = cl;  in pcc_mbox_request_channel()
135 	init_completion(&chan->tx_complete);  in pcc_mbox_request_channel()
137 	if (chan->txdone_method == TXDONE_BY_POLL && cl->knows_txdone)  in pcc_mbox_request_channel()
138 		chan->txdone_method |= TXDONE_BY_ACK;  in pcc_mbox_request_channel()
140 	spin_unlock_irqrestore(&chan->lock, flags);  in pcc_mbox_request_channel()
142 	return chan;  in pcc_mbox_request_channel()
152 void pcc_mbox_free_channel(struct mbox_chan *chan)  in pcc_mbox_free_channel()  argument
156 	if (!chan || !chan->cl)  in pcc_mbox_free_channel()
159 	spin_lock_irqsave(&chan->lock, flags);  in pcc_mbox_free_channel()
160 	chan->cl = NULL;  in pcc_mbox_free_channel()
161 	chan->active_req = NULL;  in pcc_mbox_free_channel()
162 	if (chan->txdone_method == (TXDONE_BY_POLL | TXDONE_BY_ACK))  in pcc_mbox_free_channel()
163 		chan->txdone_method = TXDONE_BY_POLL;  in pcc_mbox_free_channel()
165 	spin_unlock_irqrestore(&chan->lock, flags);  in pcc_mbox_free_channel()
181 static int pcc_send_data(struct mbox_chan *chan, void *data)  in pcc_send_data()  argument
183 	struct acpi_pcct_hw_reduced *pcct_ss = chan->con_priv;  in pcc_send_data()