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Diffstat (limited to 'net/caif/cffrml.c')
-rw-r--r--net/caif/cffrml.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/net/caif/cffrml.c b/net/caif/cffrml.c
index 4f4f756c49ac..04204b202718 100644
--- a/net/caif/cffrml.c
+++ b/net/caif/cffrml.c
@@ -33,7 +33,6 @@ static void cffrml_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
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) {
@@ -128,6 +127,13 @@ static int cffrml_receive(struct cflayer *layr, struct cfpkt *pkt)
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);
}
@@ -150,15 +156,22 @@ static int cffrml_transmit(struct cflayer *layr, struct cfpkt *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);
}