From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-out.m-online.net ([212.18.0.9]) by canuck.infradead.org with esmtp (Exim 4.72 #1 (Red Hat Linux)) id 1Q2gpX-0006fQ-MB for linux-mtd@lists.infradead.org; Thu, 24 Mar 2011 09:27:49 +0000 From: Detlev Zundel To: Norbert van Bolhuis Subject: Re: [RFC] Handling of errors for AMD NOR (cfi_cmdset_0002) chips References: <4D797E23.6070409@emcraft.com> <4D79DC90.6070600@aimvalley.nl> <4D8AF428.5010000@aimvalley.nl> Date: Thu, 24 Mar 2011 10:27:43 +0100 In-Reply-To: <4D8AF428.5010000@aimvalley.nl> (Norbert van Bolhuis's message of "Thu, 24 Mar 2011 08:35:04 +0100") Message-ID: MIME-Version: 1.0 Content-Type: text/plain Cc: linux-mtd@lists.infradead.org, yanok@emcraft.com List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi Norbert, > On 03/23/11 16:47, Detlev Zundel wrote: >> Hi Norbert, >> >>> What issue you have with NOR flash and UBIFS ? >> >> We're still working on the issue initially reported by Anatolij here: >> >> http://thread.gmane.org/gmane.linux.drivers.mtd/33832 >> >> Cheers >> Detlev >> > > > ok, thanks. > > But the unstable bit problem is different from software timeout > related issues regarding UBI and NOR flash the OP mentioned. > It is anyway good to hear work is in progress here. It is never good to ignore errors reported by the hardware if you are looking for problems in higher software layers. That's why we decided to implement such error checks which can then be helpful in our further testing. We are hoping that we can better differentiate between software and hardware problems this way. > I asked about the software timeout issue because I've seen false > timeouts with powerpc + CONFIG_NO_HZ a while ago. > In my case the low-level do_write_buffer (cfi_cmdset_0002.c) timed > out too early. See > http://lkml.org/lkml/2009/9/3/84 Ok, I see, thanks for the pointer. The problems you experienced then were unneccessary software timeouts, but there was no data corruption, correct? Best wishes Detlev Zundel -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu@denx.de