From mboxrd@z Thu Jan 1 00:00:00 1970 From: computersforpeace@gmail.com (Brian Norris) Date: Tue, 13 Oct 2015 11:06:13 -0700 Subject: [PATCH v4] mtd: nand: pass page number to ecc->write_xxx() methods In-Reply-To: <1444728138-3744-1-git-send-email-boris.brezillon@free-electrons.com> References: <1443765205-8730-1-git-send-email-boris.brezillon@free-electrons.com> <1444728138-3744-1-git-send-email-boris.brezillon@free-electrons.com> Message-ID: <20151013180613.GA107187@google.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Oct 13, 2015 at 11:22:18AM +0200, Boris Brezillon wrote: > The ->read_xxx() methods are all passed the page number the NAND controller > is supposed to read, but ->write_xxx() do not have such a parameter. > > This is a problem if we want to properly implement data > scrambling/randomization in order to mitigate MLC sensibility to repeated > pattern: to prevent bitflips in adjacent pages in the same block we need > to avoid repeating the same pattern at the same offset in those pages, > hence the randomizer/scrambler engine need to be passed the page value > in order to adapt its seed accordingly. > > Moreover, adding the page parameter to the ->write_xxx() methods add some > consistency to the current API. > > Signed-off-by: Boris Brezillon > CC: Josh Wu > CC: Ezequiel Garcia > CC: Maxime Ripard > CC: Greg Kroah-Hartman > CC: Huang Shijie > CC: Stefan Agner > CC: devel at driverdev.osuosl.org > CC: linux-arm-kernel at lists.infradead.org > CC: linux-kernel at vger.kernel.org > --- > Changes since v3: > - rebased on l2-mtd/master > > Changes since v2: > - fixed compilation error in the gpmi driver > - compile tested all impacted drivers except the bf5xx_nand, > fsl_elbc_nand and fsl_ifc_nand ones > > Changes since v1: > - rebased on l2-mtd/master > - fixed compilation error in the docg4 driver Applied to l2-mtd.git