static u32 cffrml_rcv_error;
static u32 cffrml_rcv_checsum_error;
struct cflayer *cffrml_create(u16 phyid, bool use_fcs)
-
{
struct cffrml *this = kmalloc(sizeof(struct cffrml), GFP_ATOMIC);
if (!this) {
cfpkt_destroy(pkt);
return -EPROTO;
}
+
+ if (layr->up == NULL) {
+ pr_err("Layr up is missing!\n");
+ cfpkt_destroy(pkt);
+ return -EINVAL;
+ }
+
return layr->up->receive(layr->up, pkt);
}
cfpkt_info(pkt)->hdr_len += 2;
if (cfpkt_erroneous(pkt)) {
pr_err("Packet is erroneous!\n");
+ cfpkt_destroy(pkt);
return -EPROTO;
}
+
+ if (layr->dn == NULL) {
+ cfpkt_destroy(pkt);
+ return -ENODEV;
+
+ }
return layr->dn->transmit(layr->dn, pkt);
}
static void cffrml_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
int phyid)
{
- if (layr->up->ctrlcmd)
+ if (layr->up && layr->up->ctrlcmd)
layr->up->ctrlcmd(layr->up, ctrl, layr->id);
}