[linux-dvb] consecutive poll timeouts

["C.Y.M." <syphir@syphir.sytes.net>]

After performing a few recordings yesterday, I noticed that there were
several hours of ring buffer overflow errors in my syslog. I am using a
Nexus-S DVB card. The only thing that has changed is updating the following
file:

CVSROOT:	/cvs/linuxtv
Module name:	dvb-kernel
Changes by:	kenneth	20041001 05:28:43

Modified files:
	linux/drivers/media/dvb/ttpci: av7110_ca.c 

Log message:
- Fix dvb-ttpci ca write poll.

Here are a few snips of my log:

Oct  1 04:00:56 poseidon vdr[8340]: buffer usage: 90% (tid=753672)
Oct  1 04:00:56 poseidon vdr[8340]: buffer usage: 100% (tid=753672)
Oct  1 04:00:56 poseidon vdr[8340]: buffer usage: 90% (tid=753672)
Oct  1 04:00:56 poseidon vdr[8340]: buffer usage: 100% (tid=753672)
Oct  1 04:00:57 poseidon vdr[8340]: ERROR: 2279 ring buffer overflows
(428341 bytes dropped)
Oct  1 04:00:57 poseidon vdr[8340]: buffer usage: 90% (tid=753672)
Oct  1 04:00:57 poseidon vdr[8340]: buffer usage: 100% (tid=753672)
Oct  1 04:00:57 poseidon vdr[8340]: buffer usage: 90% (tid=753672)

<repeat>

Oct  1 04:08:20 poseidon vdr[8340]: buffer usage: 90% (tid=753672)
Oct  1 04:08:20 poseidon vdr[8340]: buffer usage: 100% (tid=753672)
Oct  1 04:08:20 poseidon vdr[8340]: buffer usage: 90% (tid=753672)
Oct  1 04:08:21 poseidon vdr[8347]: clearing device because of consecutive
poll timeouts
Oct  1 04:08:21 poseidon vdr[8340]: buffer usage: 0% (tid=753672)

<repeat>

Oct  1 05:59:59 poseidon vdr[8340]: buffer usage: 90% (tid=753672)
Oct  1 05:59:59 poseidon vdr[8340]: buffer usage: 100% (tid=753672)
Oct  1 06:00:00 poseidon vdr[8340]: ERROR: 5638 ring buffer overflows
(1059833 bytes dropped)
Oct  1 06:00:00 poseidon vdr[10744]: recording thread ended (pid=10744,
tid=868363)
Oct  1 06:00:00 poseidon vdr[1911]: buffer stats: 141188 (1%) used


Is it possible that this driver update could have caused this?  I would also
like to mention that even though I had all of these buffer errors, the
recording was still good.