2.4.30: pwc pwc_isoc_handler() called with status -84

2.4.30: pwc pwc_isoc_handler() called with status -84

[Gabor Z. Papp]

I have a Philips 750 webcam camera, equipped with a
Sony CCD sensor + TDA878.

It was working fine with 2.4.29 and earlier kernels, often with
100-150 days uptime.

As I upgraded to 2.4.30-rc kernels, started getting such error in my
kernel log:

pwc Too many ISOC errors, bailing out.
pwc pwc_isoc_handler() called with status -84 [CRC/Timeout (could be anything)].

[khubd] got 100% cputime, and kernel just printed and printed this
message to the log, generating huge files. :-)

rc4 is still doing this. 1-2 hour online, the something get mad and
the pwc driver eat the cputime. 2.4.28 was 100% okay from this point
of view.

http://gzp.odpn.net/tmp/pwc/

Re: 2.4.30: pwc pwc_isoc_handler() called with status -84

[Marcelo Tosatti]

Hi Gabor, 

This seems to be a USB specific problem and my USB knowledge is null.

CCing Pete.

On Mon, Apr 04, 2005 at 08:59:57PM +0200, Gabor Z. Papp wrote:
> I have a Philips 750 webcam camera, equipped with a
> Sony CCD sensor + TDA878.
> 
> It was working fine with 2.4.29 and earlier kernels, often with
> 100-150 days uptime.
> 
> As I upgraded to 2.4.30-rc kernels, started getting such error in my
> kernel log:
> 
> pwc Too many ISOC errors, bailing out.
> pwc pwc_isoc_handler() called with status -84 [CRC/Timeout (could be anything)].
> 
> [khubd] got 100% cputime, and kernel just printed and printed this
> message to the log, generating huge files. :-)
> 
> rc4 is still doing this. 1-2 hour online, the something get mad and
> the pwc driver eat the cputime. 2.4.28 was 100% okay from this point
> of view.
> 
> http://gzp.odpn.net/tmp/pwc/

Re: 2.4.30: pwc pwc_isoc_handler() called with status -84

[Pete Zaitcev]

On Tue, 5 Apr 2005 10:55:52 -0300 Marcelo Tosatti <marcelo.tosatti@cyclades.com> wrote:

> CCing Pete.
> 
> On Mon, Apr 04, 2005 at 08:59:57PM +0200, Gabor Z. Papp wrote:

> > It was working fine with 2.4.29 and earlier kernels, often with
> > 100-150 days uptime.
> > 
> > As I upgraded to 2.4.30-rc kernels, started getting such error in my
> > kernel log:
> > 
> > pwc Too many ISOC errors, bailing out.
> > pwc pwc_isoc_handler() called with status -84 [CRC/Timeout (could be anything)].

There is no other way but to start splitting patches and diff-ing.
We can narrow this down a little by looking at what _might_ be involved.
Is this device driven by EHCI? A snapshot of /proc/bus/usb/devices
would be useful (BTW, Gabor, please do it on both 2.4.28 and 2.4.30-rc).

Thanks,
-- Pete

Re: 2.4.30: pwc pwc_isoc_handler() called with status -84

[Gabor Z. Papp]

* Pete Zaitcev <zaitcev@redhat.com>:

| > > pwc Too many ISOC errors, bailing out.
| > > pwc pwc_isoc_handler() called with status -84 [CRC/Timeout (could be anything)].
| 
| There is no other way but to start splitting patches and diff-ing.
| We can narrow this down a little by looking at what _might_ be involved.
| Is this device driven by EHCI?

yes, i think so. Asus P4C800-E mobo. Details in the tarball.

| A snapshot of /proc/bus/usb/devices would be useful (BTW, Gabor,
| please do it on both 2.4.28 and 2.4.30-rc).

Right now I have .30-rc only: http://gzp.odpn.net/tmp/pwc/pwc.tgz
I should compile a new 2.4.28, because I deleted...