From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from grelber.thyrsus.com (static-71-162-243-5.phlapa.fios.verizon.net [71.162.243.5]) by ozlabs.org (Postfix) with ESMTP id E311FB7C23 for ; Sat, 9 Jan 2010 19:17:35 +1100 (EST) From: Rob Landley To: Benjamin Herrenschmidt Subject: Re: [PATCH] Re: ZILOG serial port broken in 2.6.32 Date: Sat, 9 Jan 2010 02:17:23 -0600 References: <200912060101.22515.rob@landley.net> <200912080642.52103.rob@landley.net> <1262919644.2173.704.camel@pasglop> In-Reply-To: <1262919644.2173.704.camel@pasglop> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Message-Id: <201001090217.25729.rob@landley.net> Cc: paulus@samba.org, linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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