HDLCDRV_MAGIC
BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);
if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC)
BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);
if (!dev || !bc || bc->hdrv.magic != HDLCDRV_MAGIC)
BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);
if (!s || s->magic != HDLCDRV_MAGIC)
if (!s || s->magic != HDLCDRV_MAGIC)
if (!s || s->magic != HDLCDRV_MAGIC || s->hdlctx.ptt || !s->skb)
s->magic = HDLCDRV_MAGIC;
BUG_ON(s->magic != HDLCDRV_MAGIC);