[linux-dvb] twinhan sat express and latest patches

[Roberto Sebastiano]

Hi have a severe problem with the latest patches (sent to me by Abraham)
for the Twinhan DVB cards.
(Note for Manu: I compiled the tree named "17 Feb 05 Twinhan FE")

With a stock 2.6.10 kernel the drivers successfully registers the
frontend, but then some applications don't work due to
FE_DISEQC_SEND_BURST.


With the patches I get:
bttv0: Bt878 (rev 17) at 0000:01:09.0, irq: 5, latency: 32, mmio:
0xd4000000
bttv0: detected: Twinhan VisionPlus DVB-T [card=113], PCI subsystem ID
is 1822:0001
bttv0: using: Twinhan DST + clones [card=113,autodetected]
bttv0: gpio: en=00000000, out=00000000 in=00f500ff [init]
bttv0: using tuner=4
bttv0: add subdevice "dvb0"
bt878: AUDIO driver version 0.0.0 loaded
bt878: Bt878 AUDIO function found (0).
DVB: registering new adapter (bttv0).
DVB: registering frontend 0 (<NULL>)...


newdeal:~# lsmod
Module                  Size  Used by
dvb_bt8xx              11844  0 
dst_ca                 16464  1 dvb_bt8xx
dvb_core               83176  2 dvb_bt8xx,dst_ca
nxt6000                 7236  1 dvb_bt8xx
sp887x                  8196  1 dvb_bt8xx
cx24110                 8260  1 dvb_bt8xx
mt352                   6980  1 dvb_bt8xx
dst                    18896  2 dvb_bt8xx,dst_ca
bt878                  10488  2 dvb_bt8xx,dst
vmnet                  30448  6 
vmmon                  49560  0 
tuner                  21796  0 
bttv                  153680  2 dvb_bt8xx,bt878
video_buf              22020  1 bttv
v4l2_common             5760  1 bttv
btcx_risc               4808  1 bttv
videodev                9728  1 bttv
lirc_serial            13344  1 
lirc_dev               13836  1 lirc_serial
8139too                24832  0 
forcedeth              17536  0 
rtc                    12664  0 


And if I try to access to frontend0:
scan Hotbird-13.0E 
scanning Hotbird-13.0E
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
Segmentation fault


And on dmesg:
Unable to handle kernel NULL pointer dereference at virtual address
000001ac
 printing eip:
f8e2d40f
*pde = 00000000
Oops: 0000 [#1]
PREEMPT 
Modules linked in: dvb_bt8xx dst_ca dvb_core nxt6000 sp887x cx24110
mt352 dst bt878 vmnet vmmon tuner bttv video_buf v4l2_common btcx_risc
videodev lirc_serial lirc_dev 8139too forcedeth rtc
CPU:    0
EIP:    0060:[<f8e2d40f>]    Tainted: PF     VLI
EFLAGS: 00010246   (2.6.10) 
EIP is at dvb_frontend_start+0x1f/0x100 [dvb_core]
eax: 00000000   ebx: 00000000   ecx: 00000000   edx: f65caa20
esi: f7180500   edi: f7180500   ebp: e79cdea8   esp: e79cde94
ds: 007b   es: 007b   ss: 0068
Process scan (pid: 3654, threadinfo=e79cc000 task=e79b6500)
Stack: 00000000 e79cdeb0 c0159e72 00000000 e77b5060 e79cdec8 f8e2dbd7
f7180500 
       e77b5060 00000000 f65caa20 f8e383e0 e77b5060 e79cdeec f8e25164
f777bdac 
       e77b5060 00000001 00000000 e77b5060 f8e38460 00000000 e79cdf18
c015a022 
Call Trace:
 [<c010344f>] show_stack+0x7f/0xa0
 [<c01035ea>] show_registers+0x15a/0x1c0
 [<c01037e0>] die+0xf0/0x180
 [<c0111e2d>] do_page_fault+0x28d/0x63e
 [<c01030a7>] error_code+0x2b/0x30
 [<f8e2dbd7>] dvb_frontend_open+0x57/0xa0 [dvb_core]
 [<f8e25164>] dvb_device_open+0xf4/0x1c0 [dvb_core]
 [<c015a022>] chrdev_open+0xf2/0x1e0
 [<c01502a6>] dentry_open+0x146/0x230
 [<c015015b>] filp_open+0x5b/0x60
 [<c0150556>] sys_open+0x46/0x90
 [<c0102693>] syscall_call+0x7/0xb
Code: 9e 2e c7 e9 77 fe ff ff 8d 74 26 00 55 89 e5 83 ec 14 a1 d0 90 e3
f8 89 75 fc 89 5d f8 8b 75 08 85 c0 8b 5e 0c 0f 85 c2 00 00 00 <8b> 83
ac 01 00 00 85 c0 74 1e 8b 83 dc 01 00 00 85 c0 75 0c 31 



Let me know what I can do to help the bugfixing process.


Thanks,
Roberto Sebastiano