> -----Original Message----- > From: Charles Manning [mailto:mannin...@actrix.gen.nz] > Sent: Monday, December 20, 2010 3:16 AM > To: linux-...@lists.infradead.org > Cc: Ghorai, Sukumar; linux-omap@vger.kernel.org; linux-arm- > ker...@lists.infradead.org > Subject: Re: [PATCH v6 0/7] nand prefetch-irq support and ecc layout > chanage > > On Saturday 27 November 2010 04:34:30 Sukumar Ghorai wrote: > > The following set of patches applies on linux-2.6. > > > > The main motivations behind this patch series are - > > 1. support NAND I/O in irq mode. > > 2. support of different ECC schema. > > 3. also to make ecc layout as like in romcode ecc layout > > Why change the ECC layout? > > Be very careful when you change ECC layouts. This can break production > systems. > > For example if people are running something earlier and then want to > deliver a > new kernel with 2.6.37 then their existing NAND file systems will no > longer > be readable. > > Changes to ECC should only be done for very good reasons and should be > controlled with a Kconfig with the default being the existing ECC layout. > [Ghorai] we are just adding few ecc-layout(s) and based on the request from different customer. The default ecc-layout is the old one for backward compatibility and selection of ecc-layput is exposed form board file.
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