net/can/isotp.c

164 	u32 cfecho; /* consecutive frame echo tag */
799 	/* cfecho should have been zero'ed by init/isotp_rcv_echo() */
800 	if (so->cfecho)
801 		pr_notice_once("can-isotp: cfecho is %08X != 0\n", so->cfecho);
804 	so->cfecho = *(u32 *)cf->data;
859 	if (skb->sk != sk || so->cfecho != *(u32 *)cf->data)
866 	so->cfecho = 0;
929 	/* cfecho should be consumed by isotp_rcv_echo() here */
930 	if (so->tx.state == ISOTP_SENDING && !so->cfecho)
1018 	/* cfecho should have been zero'ed by init / former isotp_rcv_echo() */
1019 	if (so->cfecho)
1020 		pr_notice_once("can-isotp: uninit cfecho %08X\n", so->cfecho);
1048 		so->cfecho = *(u32 *)cf->data;
1065 			so->cfecho = *(u32 *)cf->data;
1074 			so->cfecho = 0;
1096 		so->cfecho = 0;
1328 	so->cfecho = 0;