From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.theptrgroup.com (mail.theptrgroup.com [209.183.211.9]) by ozlabs.org (Postfix) with ESMTP id B93A667B6C for ; Sat, 9 Dec 2006 13:18:37 +1100 (EST) Subject: Re: reboot problem with MPC8248 based board From: Jeff Angielski To: Jianlin Zeng In-Reply-To: <937646.80061.qm@web56706.mail.re3.yahoo.com> References: <937646.80061.qm@web56706.mail.re3.yahoo.com> Content-Type: text/plain Date: Fri, 08 Dec 2006 20:47:13 -0500 Message-Id: <1165628833.25443.10.camel@jaalaptop> Mime-Version: 1.0 Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, 2006-12-08 at 17:25 -0800, Jianlin Zeng wrote: > Hi, > > I have a MPC8248 based board running with linux kernel > 2.6.11. I mounted jffs2 FS on a NOR flash devices. The > jffs2 FS works fine. But whenever I modify any files > in jffs2 FS and soft reboot the board, the reboot > hangs. If I don't modify any files in jffs2 FS and > just do flashcp to mtd char device, the soft reboot > works fine. > > I tried doing "reboot" through "m8260_gorom" or a > mechanism similar to what is used in u-boot. The > result is the same. I don't understand why jffs2 write > causes reboot to hang but MTD char device write does > not. Does anybody have similar experience? Can anybody > give me some help? > > Thanks, > Jianlin I have seen strange reboot behavior like this when the flash chips were left in write mode. After reboot, you are unable to read the flash and the system just hangs. In 2.4 days, we solved this with a reboot_notifier that just went through the sectors and reset them back to read mode. Not sure if that helps but at least it gives you something to look into. -- Jeff Angielski The PTR Group