diff options
| author | Rémi Denis-Courmont <remi.denis-courmont@nokia.com> | 2010-01-04 02:02:47 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-01-07 00:24:54 -0800 |
| commit | fc6a110754476362f9f4fa3199a637f2331c5993 (patch) | |
| tree | 2b1457da4758751121ec396767e200dc2a28c2ed | |
| parent | f6de7acc42de909ccc7f00916ddb4d2064f42b67 (diff) | |
Phonet: zero-copy aligned GPRS RX
Newer Nokia cellular modems can use aligned payload for their GPRS pipe.
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/phonet/pep.h | 1 | ||||
| -rw-r--r-- | net/phonet/pep-gprs.c | 4 | ||||
| -rw-r--r-- | net/phonet/pep.c | 3 |
3 files changed, 6 insertions, 2 deletions
diff --git a/include/net/phonet/pep.h b/include/net/phonet/pep.h index 4c61cdce4e5..c37162547a9 100644 --- a/include/net/phonet/pep.h +++ b/include/net/phonet/pep.h @@ -77,6 +77,7 @@ static inline struct pnpipehdr *pnp_hdr(struct sk_buff *skb) enum { PNS_PIPE_DATA = 0x20, + PNS_PIPE_ALIGNED_DATA, PNS_PEP_CONNECT_REQ = 0x40, PNS_PEP_CONNECT_RESP, diff --git a/net/phonet/pep-gprs.c b/net/phonet/pep-gprs.c index d183509d3fa..d01208968c8 100644 --- a/net/phonet/pep-gprs.c +++ b/net/phonet/pep-gprs.c @@ -96,11 +96,11 @@ static int gprs_recv(struct gprs_dev *gp, struct sk_buff *skb) goto drop; } - if (likely(skb_headroom(skb) & 3)) { + if (skb_headroom(skb) & 3) { struct sk_buff *rskb, *fs; int flen = 0; - /* Phonet Pipe data header is misaligned (3 bytes), + /* Phonet Pipe data header may be misaligned (3 bytes), * so wrap the IP packet as a single fragment of an head-less * socket buffer. The network stack will pull what it needs, * but at least, the whole IP payload is not memcpy'd. */ diff --git a/net/phonet/pep.c b/net/phonet/pep.c index b6356f3832f..e23e30907d3 100644 --- a/net/phonet/pep.c +++ b/net/phonet/pep.c @@ -354,6 +354,9 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb) queue = &pn->ctrlreq_queue; goto queue; + case PNS_PIPE_ALIGNED_DATA: + __skb_pull(skb, 1); + /* fall through */ case PNS_PIPE_DATA: __skb_pull(skb, 3); /* Pipe data header */ if (!pn_flow_safe(pn->rx_fc)) { |