221 	u8 fcs;  member
369  *	gsm_fcs_add	-	update FCS
370  *	@fcs: Current FCS
373  *	Update the FCS to include c. Uses the algorithm in the specification
377 static inline u8 gsm_fcs_add(u8 fcs, u8 c)  in gsm_fcs_add()  argument
379 	return gsm_fcs8[fcs ^ c];  in gsm_fcs_add()
383  *	gsm_fcs_add_block	-	update FCS for a block
384  *	@fcs: Current FCS
388  *	Update the FCS to include c. Uses the algorithm in the specification
392 static inline u8 gsm_fcs_add_block(u8 fcs, u8 *c, int len)  in gsm_fcs_add_block()  argument
395 		fcs = gsm_fcs8[fcs ^ *c++];  in gsm_fcs_add_block()
396 	return fcs;  in gsm_fcs_add_block()
623 #define HDR_LEN		6	/* ADDR CTRL [LEN.2] DATA FCS */
629  *	@len: length excluding header and FCS
644 	m->data = m->buffer + HDR_LEN - 1;	/* Allow for FCS */  in gsm_data_alloc()
724 	u8 *fcs = dp + msg->len;  in __gsm_data_queue()  local
741 	*fcs = gsm_fcs_add_block(INIT_FCS, dp , msg->data - dp);  in __gsm_data_queue()
744 		*fcs = gsm_fcs_add_block(*fcs, msg->data, msg->len);  in __gsm_data_queue()
745 	*fcs = 0xFF - *fcs;  in __gsm_data_queue()
750 	/* Move the header back and adjust the length, also allow for the FCS  in __gsm_data_queue()
1743  *	The fcs holds the header FCS but any data FCS must be added here.
1751 	/* We have to sneak a look at the packet body to do the FCS.  in gsm_queue()
1755 		gsm->fcs = gsm_fcs_add_block(gsm->fcs, gsm->buf, gsm->len);  in gsm_queue()
1761 		gsm->fcs = gsm_fcs_add(gsm->fcs, gsm->received_fcs);  in gsm_queue()
1763 	if (gsm->fcs != GOOD_FCS) {  in gsm_queue()
1766 			pr_debug("BAD FCS %02x\n", gsm->fcs);  in gsm_queue()
1873 			gsm->fcs = INIT_FCS;  in gsm0_receive()
1877 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1882 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1887 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1904 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm0_receive()
1923 	case GSM_FCS:		/* FCS follows the packet */  in gsm0_receive()
1952 		   and received at least one byte (the FCS) */  in gsm1_receive()
1954 			/* Extract the FCS */  in gsm1_receive()
1956 			gsm->fcs = gsm_fcs_add(gsm->fcs, gsm->buf[gsm->count]);  in gsm1_receive()
1989 		gsm->fcs = INIT_FCS;  in gsm1_receive()
1992 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm1_receive()
1997 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);  in gsm1_receive()
2003 		if (gsm->count > gsm->mru) {	/* Allow one for the FCS */  in gsm1_receive()