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firedtv: use length_field() of PMT as length

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Parsed and used the length_field() of the PMT message instead of using
the length field of the message struct, which does not seem to be filled
correctly by e.g. MythTV.

Signed-off-by: Henrik Kurelid <henrik@kurelid.se>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Henrik Kurelid
2008-12-05 10:00:16 +01:00
committed by Stefan Richter
parent 096edfbf16
commit 7199e523ef
1 changed files with 12 additions and 6 deletions
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18
drivers/media/dvb/firesat/firesat-ci.c
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@@ -127,14 +127,20 @@ static int firesat_ca_pmt(struct firesat *firesat, void *arg)
{ {
struct ca_msg *msg = arg; struct ca_msg *msg = arg;
int data_pos; int data_pos;
int data_length;
int i;
if (msg->msg[3] & 0x80) data_pos = 4;
data_pos = (msg->msg[4] && 0x7F) + 4; if (msg->msg[3] & 0x80) {
else data_length = 0;
data_pos = 4; for (i = 0; i < (msg->msg[3] & 0x7F); i++)
data_length = (data_length << 8) + msg->msg[data_pos++];
} else {
data_length = msg->msg[3];
}
return avc_ca_pmt(firesat, &msg->msg[data_pos], return avc_ca_pmt(firesat, &msg->msg[data_pos], data_length) ?
msg->length - data_pos) ? -EFAULT : 0; -EFAULT : 0;
} }
static int firesat_ca_send_msg(struct firesat *firesat, void *arg) static int firesat_ca_send_msg(struct firesat *firesat, void *arg)