From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from az33egw02.freescale.net (az33egw02.freescale.net [192.88.158.103]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "az33egw02.freescale.net", Issuer "Thawte Premium Server CA" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 00C1DB7BBB for ; Sat, 17 Oct 2009 02:31:48 +1100 (EST) Date: Fri, 16 Oct 2009 10:31:29 -0500 From: Scott Wood To: Felix Radensky Subject: Re: UBIFS problem on MPC8536DS Message-ID: <20091016153128.GA11838@loki.buserror.net> References: <4AD5ADC9.30503@embedded-sol.com> <4AD5C5B4.3060303@nokia.com> <4AD5D053.9000901@embedded-sol.com> <4AD5FFE7.7080703@nokia.com> <4AD60EF4.4080306@embedded-sol.com> <4AD614E4.6030005@freescale.com> <4AD7811A.6040501@freescale.com> <4AD7FE37.1060705@embedded-sol.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <4AD7FE37.1060705@embedded-sol.com> Cc: "linuxppc-dev@ozlabs.org" , "linux-mtd@lists.infradead.org" , Adrian Hunter List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, Oct 16, 2009 at 07:01:43AM +0200, Felix Radensky wrote: > Thanks for confirmation. So the real problem is eLBC ? > What happens if I access other devices on eLBC (e.g. FPGA) > simultaneously with NAND or NOR ? AFAICT, the problem is NAND being accessed simultaneously with anything else on the eLBC (at least GPCM -- not sure about UPM). Instead of delaying the memory-like transaction until the NAND special operation has completed, it seems to just abort the NAND operation. eLBC can't really tell the difference whether you've got NOR or FPGA hooked up to a GPCM chip select, so the problem should still apply. -Scott