220 	u8 fcs;  member
368  *	gsm_fcs_add	-	update FCS
369  *	@fcs: Current FCS
372  *	Update the FCS to include c. Uses the algorithm in the specification
376 static inline u8 gsm_fcs_add(u8 fcs, u8 c)  in gsm_fcs_add()  argument
378 	return gsm_fcs8[fcs ^ c];  in gsm_fcs_add()
382  *	gsm_fcs_add_block	-	update FCS for a block
383  *	@fcs: Current FCS
387  *	Update the FCS to include c. Uses the algorithm in the specification
391 static inline u8 gsm_fcs_add_block(u8 fcs, u8 *c, int len)  in gsm_fcs_add_block()  argument
394 		fcs = gsm_fcs8[fcs ^ *c++];  in gsm_fcs_add_block()
395 	return fcs;  in gsm_fcs_add_block()
622 #define HDR_LEN		6	/* ADDR CTRL [LEN.2] DATA FCS */
628  *	@len: length excluding header and FCS
643 	m->data = m->buffer + HDR_LEN - 1;	/* Allow for FCS */  in gsm_data_alloc()
722 	u8 *fcs = dp + msg->len;  in __gsm_data_queue()  local
739 	*fcs = gsm_fcs_add_block(INIT_FCS, dp , msg->data - dp);  in __gsm_data_queue()
742 		*fcs = gsm_fcs_add_block(*fcs, msg->data, msg->len);  in __gsm_data_queue()
743 	*fcs = 0xFF - *fcs;  in __gsm_data_queue()
748 	/* Move the header back and adjust the length, also allow for the FCS  in __gsm_data_queue()
1740  *	The fcs holds the header FCS but any data FCS must be added here.
1748 	/* We have to sneak a look at the packet body to do the FCS.  in gsm_queue()
1752 		gsm->fcs = gsm_fcs_add_block(gsm->fcs, gsm->buf, gsm->len);  in gsm_queue()
1758 		gsm->fcs = gsm_fcs_add(gsm->fcs, gsm->received_fcs);  in gsm_queue()
1760 	if (gsm->fcs != GOOD_FCS) {  in gsm_queue()
1763 			pr_debug("BAD FCS %02x\n", gsm->fcs);  in gsm_queue()
1870 			gsm->fcs = INIT_FCS;  in gsm0_receive()
1874 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1879 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1884 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1901 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1920 	case GSM_FCS:		/* FCS follows the packet */  in gsm0_receive()
1949 		   and received at least one byte (the FCS) */  in gsm1_receive()
1951 			/* Extract the FCS */  in gsm1_receive()
1953 			gsm->fcs = gsm_fcs_add(gsm->fcs, gsm->buf[gsm->count]);  in gsm1_receive()
1986 		gsm->fcs = INIT_FCS;  in gsm1_receive()
1989 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm1_receive()
1994 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm1_receive()
2000 		if (gsm->count > gsm->mru) {	/* Allow one for the FCS */  in gsm1_receive()