From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from az33egw02.freescale.net ([192.88.158.103]) by bombadil.infradead.org with esmtps (Exim 4.69 #1 (Red Hat Linux)) id 1MyomG-00045X-FA for linux-mtd@lists.infradead.org; Fri, 16 Oct 2009 15:31:41 +0000 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 Content-Disposition: inline In-Reply-To: <4AD7FE37.1060705@embedded-sol.com> Cc: "linuxppc-dev@ozlabs.org" , "linux-mtd@lists.infradead.org" , Adrian Hunter List-Id: Linux MTD discussion mailing 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