1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) ST-Ericsson AB 2010
25 	spinlock_t sync;  member
45 	this->layer.receive = cfserl_receive;  in cfserl_create()
46 	this->layer.transmit = cfserl_transmit;  in cfserl_create()
47 	this->layer.ctrlcmd = cfserl_ctrlcmd;  in cfserl_create()
48 	this->usestx = use_stx;  in cfserl_create()
49 	spin_lock_init(&this->sync);  in cfserl_create()
50 	snprintf(this->layer.name, CAIF_LAYER_NAME_SZ, "ser1");  in cfserl_create()
51 	return &this->layer;  in cfserl_create()
67 	spin_lock(&layr->sync);  in cfserl_receive()
69 	if (layr->incomplete_frm != NULL) {  in cfserl_receive()
70 		layr->incomplete_frm =  in cfserl_receive()
71 		    cfpkt_append(layr->incomplete_frm, newpkt, expectlen);  in cfserl_receive()
72 		pkt = layr->incomplete_frm;  in cfserl_receive()
74 			spin_unlock(&layr->sync);  in cfserl_receive()
75 			return -ENOMEM;  in cfserl_receive()
80 	layr->incomplete_frm = NULL;  in cfserl_receive()
84 		if (layr->usestx) {  in cfserl_receive()
93 					layr->incomplete_frm = NULL;  in cfserl_receive()
94 					spin_unlock(&layr->sync);  in cfserl_receive()
95 					return -EPROTO;  in cfserl_receive()
108 		if (pkt_len < 2) {  in cfserl_receive()
109 			if (layr->usestx)  in cfserl_receive()
111 			layr->incomplete_frm = pkt;  in cfserl_receive()
112 			spin_unlock(&layr->sync);  in cfserl_receive()
120 		cfpkt_peek_head(pkt, &tmp, 2);  in cfserl_receive()
121 		expectlen = le16_to_cpu(tmp) + 2;  in cfserl_receive()
127 			if (!layr->usestx) {  in cfserl_receive()
130 				layr->incomplete_frm = NULL;  in cfserl_receive()
131 				spin_unlock(&layr->sync);  in cfserl_receive()
132 				return -EPROTO;  in cfserl_receive()
139 			if (layr->usestx)  in cfserl_receive()
141 			layr->incomplete_frm = pkt;  in cfserl_receive()
142 			spin_unlock(&layr->sync);  in cfserl_receive()
156 		spin_unlock(&layr->sync);  in cfserl_receive()
157 		ret = layr->layer.up->receive(layr->layer.up, pkt);  in cfserl_receive()
158 		spin_lock(&layr->sync);  in cfserl_receive()
159 		if (ret == -EILSEQ) {  in cfserl_receive()
160 			if (layr->usestx) {  in cfserl_receive()
175 	spin_unlock(&layr->sync);  in cfserl_receive()
183 	if (layr->usestx)  in cfserl_transmit()
185 	return layer->dn->transmit(layer->dn, newpkt);  in cfserl_transmit()
191 	layr->up->ctrlcmd(layr->up, ctrl, phyid);  in cfserl_ctrlcmd()