caif: set traffic class for caif packets

Set traffic class for CAIF packets, based on socket
priority, CAIF protocol type, or type of message.

Traffic class mapping for different packet types:
 - control:       TC_PRIO_CONTROL;
 - flow control:  TC_PRIO_CONTROL;
 - at:            TC_PRIO_CONTROL;
 - rfm:           TC_PRIO_INTERACTIVE_BULK;
 - other sockets: equals to socket's TC;
 - network data:  no change.

Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/caif/cfctrl.c b/net/caif/cfctrl.c
index 5cf5222..047cd0e 100644
--- a/net/caif/cfctrl.c
+++ b/net/caif/cfctrl.c
@@ -9,6 +9,7 @@
 #include <linux/stddef.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
+#include <linux/pkt_sched.h>
 #include <net/caif/caif_layer.h>
 #include <net/caif/cfpkt.h>
 #include <net/caif/cfctrl.h>
@@ -189,6 +190,7 @@
 	cfctrl->serv.dev_info.id = physlinkid;
 	cfpkt_addbdy(pkt, CFCTRL_CMD_ENUM);
 	cfpkt_addbdy(pkt, physlinkid);
+	cfpkt_set_prio(pkt, TC_PRIO_CONTROL);
 	dn->transmit(dn, pkt);
 }
 
@@ -281,6 +283,7 @@
 	 *	might arrive with the newly allocated channel ID.
 	 */
 	cfpkt_info(pkt)->dev_info->id = param->phyid;
+	cfpkt_set_prio(pkt, TC_PRIO_CONTROL);
 	ret =
 	    dn->transmit(dn, pkt);
 	if (ret < 0) {
@@ -314,6 +317,7 @@
 	cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_DESTROY);
 	cfpkt_addbdy(pkt, channelid);
 	init_info(cfpkt_info(pkt), cfctrl);
+	cfpkt_set_prio(pkt, TC_PRIO_CONTROL);
 	ret =
 	    dn->transmit(dn, pkt);
 #ifndef CAIF_NO_LOOP