From mboxrd@z Thu Jan 1 00:00:00 1970 In-Reply-To: Date: Thu, 30 Sep 1999 10:50:30 +0200 To: Takashi Oe , linuxppc-dev@lists.linuxppc.org From: Benjamin Herrenschmidt Subject: Re: [Fwd: Bug: 2.2.12 still hangs PPC after some PPP activity] Message-Id: <19990930105030.013866@mailhost.mipsys.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On Wed, Sep 29, 1999, Takashi Oe wrote: >I don't know of any major flaw, but the DMA code can use some testings. >I've only tested it on Power Mac 7600 with baud rate of upto 115200 bps. I've heard of various possible issues with DMA hardware on the serial ports and G3 macs. There seem to be a problem with the Heathrow generation of Apple ASICs. (This was reported to me by people who made a special device that was plugged into those ports, with a custom driver under MacOS). They told me some characters end up beeing garbled when reaching the SCC. I'll do some testings with your driver and my powerbook's internal modem this week end to see if this problem actually occurs or not. -- Perso. e-mail: Work e-mail: BenH. Web : ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/