From 2aa40aef9debc77d55cc87a50d335b6fe97fbeb0 Mon Sep 17 00:00:00 2001 From: Sjur Braendeland Date: Thu, 17 Jun 2010 06:55:40 +0000 Subject: caif: Use link layer MTU instead of fixed MTU Previously CAIF supported maximum transfer size of ~4050. The transfer size is now calculated dynamically based on the link layers mtu size. Signed-off-by: Sjur Braendeland@stericsson.com Signed-off-by: David S. Miller --- net/caif/cfdgml.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'net/caif/cfdgml.c') diff --git a/net/caif/cfdgml.c b/net/caif/cfdgml.c index 32d9f0dc846..ed9d53aff28 100644 --- a/net/caif/cfdgml.c +++ b/net/caif/cfdgml.c @@ -17,6 +17,7 @@ #define DGM_FLOW_OFF 0x81 #define DGM_FLOW_ON 0x80 #define DGM_CTRL_PKT_SIZE 1 +#define DGM_MTU 1500 static int cfdgml_receive(struct cflayer *layr, struct cfpkt *pkt); static int cfdgml_transmit(struct cflayer *layr, struct cfpkt *pkt); @@ -89,6 +90,10 @@ static int cfdgml_transmit(struct cflayer *layr, struct cfpkt *pkt) if (!cfsrvl_ready(service, &ret)) return ret; + /* STE Modem cannot handle more than 1500 bytes datagrams */ + if (cfpkt_getlen(pkt) > DGM_MTU) + return -EMSGSIZE; + cfpkt_add_head(pkt, &zero, 4); /* Add info for MUX-layer to route the packet out. */ -- cgit v1.2.3-18-g5258