[linux-dvb] saa7146_i2c_writeout: timed out waiting for end of xfer

Oliver Endriss o.endriss at gmx.de
Thu Aug 23 01:23:57 CEST 2007


Soeren Sonnenburg wrote:
> On Sun, 2007-08-19 at 01:05 +0200, Oliver Endriss wrote:
> > Soeren Sonnenburg wrote:
> > > On Tue, 2007-07-31 at 14:37 +0200, Oliver Endriss wrote:
> > > > Stone wrote:
> > > > > On 7/17/07, Oliver Endriss <o.endriss at gmx.de> wrote:
> > > > > >
> > > > > > Oliver Endriss wrote:
> > > > > > > Imho the interrupt processing was broken:
> > > > > > > - The first I2C interrupt should be used to wake-up the task.
> > > > > > >   It does not matter that it takes some time until ERR in IIC_STA
> > > > > > >   will be updated. We don't need it.
> > > > > > > - Interrupts must be acknowledged at the end of the ISR.
> > > > > > >
> > > > > > > @all
> > > > > > > Please test the attached patch.
> > > > > > > There shouldn't be any unexpected I2C interrupts anymore.
> [...]
> > > I was now using this patch for 1-2 weeks. This setup has a FF-dvb-c and
> > > a budget dvb-t card and after the patch there were no more timeout
> > > messages. However since I added the asus p7131 I am seeing this message
> > > regularly again (44 times in the last 5 days).
> > > 
> > > Thanks for investigating on this!!
> > > Soeren
> > 
> > Just to be sure:
> > You are using exactly the same setup, except for the new asus p7131?
> 
> yes, same setup + additional asus p7131.
> 
> > Strange. Maybe a power supply problem. Could you try another power
> > supply for your machine?
> 
> This is a brand new power supply already (because I thought at some
> point the usb disconnects were caused by a flaky power supply). However
> following Hermanns suggestion I permuted the cards in the slots. One day
> of up-time so far without seeing this message...

There have been reports that some mainboard layouts have problems to
supply enoungh power on the PCI bus...

> I will report back when the messages re-appear...

Thanks.

CU
Oliver

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