diff options
| author | Tilman Schmidt <tilman@imap.cc> | 2010-06-21 15:54:19 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-26 06:16:59 +0200 |
| commit | e7752ee280608a24e27f163641121bdc2c68d6af (patch) | |
| tree | a731b1d9b2c95732d2882a52bb20e4af7546de59 /drivers/isdn/gigaset/i4l.c | |
| parent | cpmac: do not leak struct net_device on phy_connect errors (diff) | |
| download | linux-e7752ee280608a24e27f163641121bdc2c68d6af.tar.xz linux-e7752ee280608a24e27f163641121bdc2c68d6af.zip | |
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/i4l.c')
| -rw-r--r-- | drivers/isdn/gigaset/i4l.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/isdn/gigaset/i4l.c b/drivers/isdn/gigaset/i4l.c index c22e5ace8276..f01c3c2e2e46 100644 --- a/drivers/isdn/gigaset/i4l.c +++ b/drivers/isdn/gigaset/i4l.c @@ -16,7 +16,10 @@ #include "gigaset.h" #include <linux/isdnif.h> +#define SBUFSIZE 4096 /* sk_buff payload size */ +#define TRANSBUFSIZE 768 /* bytes per skb for transparent receive */ #define HW_HDR_LEN 2 /* Header size used to store ack info */ +#define MAX_BUF_SIZE (SBUFSIZE - HW_HDR_LEN) /* max data packet from LL */ /* == Handling of I4L IO =====================================================*/ @@ -231,6 +234,15 @@ static int command_from_LL(isdn_ctrl *cntrl) dev_err(cs->dev, "ISDN_CMD_DIAL: channel not free\n"); return -EBUSY; } + switch (bcs->proto2) { + case L2_HDLC: + bcs->rx_bufsize = SBUFSIZE; + break; + default: /* assume transparent */ + bcs->rx_bufsize = TRANSBUFSIZE; + } + dev_kfree_skb(bcs->rx_skb); + gigaset_new_rx_skb(bcs); commands = kzalloc(AT_NUM*(sizeof *commands), GFP_ATOMIC); if (!commands) { @@ -314,6 +326,15 @@ static int command_from_LL(isdn_ctrl *cntrl) return -EINVAL; } bcs = cs->bcs + ch; + switch (bcs->proto2) { + case L2_HDLC: + bcs->rx_bufsize = SBUFSIZE; + break; + default: /* assume transparent */ + bcs->rx_bufsize = TRANSBUFSIZE; + } + dev_kfree_skb(bcs->rx_skb); + gigaset_new_rx_skb(bcs); if (!gigaset_add_event(cs, &bcs->at_state, EV_ACCEPT, NULL, 0, NULL)) return -ENOMEM; |