[PATCH] Re: ZILOG serial port broken in 2.6.32

[Rob Landley]

On Thursday 07 January 2010 21:00:43 Benjamin Herrenschmidt wrote:
> > Ok, here's the fix.  It's not the _right_ fix, but it Works For Me (tm)
> > and I'll leave it to you guys to figure out what this _means_:
>
> I've failed to reproduce so far on both a Wallstreet powerbook (similar
> generation and chipset as your beige G3) and a G5 with an added serial
> port using current upstream...
>
> Can you verify it's still there ? I might be able to reproduce on a
> Beige G3 as well next week.

It's still there on qemu 0.11.0's "g3beige" emulation when you use 
CONFIG_SERIAL_PMACZILOG as the serial console.  (QEMU 0.10.x used a 16550 
serial chip for its g3beige emulation instead of the actual ZILOG one.)  Still 
dunno if it's a qemu or bug or a kernel bug, I just know that kernel patch 
fixes it for me, and it comes back without the patch.

I tested 2.6.32.  Haven't tried the 2.6.32.3 but don't see why it would change 
this...

Rob
-- 
Latency is more important than throughput. It's that simple. - Linus Torvalds