Re: [Xen-devel] [PATCH] serial: Skip over PCIe device which have no quirks (fix AMT regression).

[Aravind Gopalakrishnan <aravind.gopalakrishnan@xxxxxxx>]

On 3/5/2014 6:43 PM, Konrad Rzeszutek Wilk wrote:
> On Mar 5, 2014 5:46 PM, Aravind Gopalakrishnan <aravind.gopalakrishnan@xxxxxxx> 
> wrote:
> > On 3/5/2014 3:09 PM, Konrad Rzeszutek Wilk wrote:
> > > This patch fixes it and allows us to use AMT again by zeroing
> > > out io_base to zero. If the scan did not work, the io_base is
> > > set back to a default value.
> > If you provide 'amt' on command line => 'skip_amt' = 0
> > Then we'd just return -1 without setting io_base to 0x3f8 due to this
> > condition-
> > if ( !skip_amt )
> >      return -1;
> >
> > (or am I missing something?)
> That particular piece of code is executed after the loop. In the loop is where 
> the AMT is found.
> > >     +    uart->io_base = 0;
> > Why not set ns16550.io_base = 0; in arch/x86/setup.c ?
> Because then you would break the default COM ports which are not find via PCI 
> scanning.
>
> Say: com1=9600,8n1
>
> Which will use by default the 3f8 io base.
Ah. Okay, I see it now..
Thanks for the clarifications.

-Aravind.



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel