diff options
| author | Tilman Schmidt <tilman@imap.cc> | 2010-06-21 13:54:19 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-25 21:16:59 -0700 |
| commit | e7752ee280608a24e27f163641121bdc2c68d6af (patch) | |
| tree | a731b1d9b2c95732d2882a52bb20e4af7546de59 /drivers/isdn/gigaset/gigaset.h | |
| parent | ed770f01360b392564650bf1553ce723fa46afec (diff) | |
isdn/gigaset: honor CAPI application's buffer size request
Fix the Gigaset CAPI driver to limit the length of a connection's
payload data receive buffers to the corresponding CAPI application's
data buffer size, as some real-life CAPI applications tend to be
rather unhappy if they receive bigger data blocks than requested.
Impact: bugfix
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/isdn/gigaset/gigaset.h')
| -rw-r--r-- | drivers/isdn/gigaset/gigaset.h | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/drivers/isdn/gigaset/gigaset.h b/drivers/isdn/gigaset/gigaset.h index 05947f9c184..f77ec54eb07 100644 --- a/drivers/isdn/gigaset/gigaset.h +++ b/drivers/isdn/gigaset/gigaset.h @@ -45,10 +45,6 @@ #define MAX_EVENTS 64 /* size of event queue */ #define RBUFSIZE 8192 -#define SBUFSIZE 4096 /* sk_buff payload size */ - -#define TRANSBUFSIZE 768 /* bytes per skb for transparent receive */ -#define MAX_BUF_SIZE (SBUFSIZE - 2) /* Max. size of a data packet from LL */ /* compile time options */ #define GIG_MAJOR 0 @@ -380,8 +376,10 @@ struct bc_state { struct at_state_t at_state; - __u16 fcs; - struct sk_buff *skb; + /* receive buffer */ + unsigned rx_bufsize; /* max size accepted by application */ + struct sk_buff *rx_skb; + __u16 rx_fcs; int inputstate; /* see INS_XXXX */ int channel; @@ -801,8 +799,23 @@ static inline void gigaset_bchannel_up(struct bc_state *bcs) gigaset_schedule_event(bcs->cs); } -/* handling routines for sk_buff */ -/* ============================= */ +/* set up next receive skb for data mode */ +static inline struct sk_buff *gigaset_new_rx_skb(struct bc_state *bcs) +{ + struct cardstate *cs = bcs->cs; + unsigned short hw_hdr_len = cs->hw_hdr_len; + + if (bcs->ignore) { + bcs->rx_skb = NULL; + } else { + bcs->rx_skb = dev_alloc_skb(bcs->rx_bufsize + hw_hdr_len); + if (bcs->rx_skb == NULL) + dev_warn(cs->dev, "could not allocate skb\n"); + else + skb_reserve(bcs->rx_skb, hw_hdr_len); + } + return bcs->rx_skb; +} /* append received bytes to inbuf */ int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src, |