Re: [Qemu-devel] [PATCH] ohci: Stop OHCI bus when PCI bus master is disabled

[Gerd Hoffmann]

  Hi,

> To be precise, it is kdump.

Ok, kdump is a different story, radically turn off all DMA is reasonable
in that case, normal driver shutdown might be unreliable after panic and
it also changes system state too much for a useful dump.

ohci (and probably others too, but without spamming the log) throwing
dma errors then is normal fallout though.  kdump kernel should be able
to bring the device back online after such an error, with your patch
applied you can't test that with qemu any more ...

> > Independant of that we can move the ohci error logging to tracepoints,
> > so ohci emulation is silent by default.
> 
> That is the other way to go, yes.

Lets do it this way please.

cheers,
  Gerd