Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933402Ab0BDXdk (ORCPT ); Thu, 4 Feb 2010 18:33:40 -0500 Received: from fg-out-1718.google.com ([72.14.220.156]:32260 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933210Ab0BDXbd (ORCPT ); Thu, 4 Feb 2010 18:31:33 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=yBQpLzUP8OnxBvGNfyjAByNUDT3ub69ywLFxEs/6QIQd2bv//o7eHEs6U+CmNcdGax UpqLzSmKd0Q9CtuhIhAXQrD2poCMJSYmMZAnCfwRh8jK5S4PyQFjyzZaojH5X42+fOn9 47KxmWzL7Vkt6maI3X2hg38ahyT8ZWU/DcBKw= From: Maxim Levitsky To: David Woodhouse Cc: Artem Bityutskiy , linux-mtd , linux-kernel , Alex Dubov , joern , Thomas Gleixner , Maxim Levitsky Subject: [PATCH 10/17] MTD: nand: make reads using MTD_OOB_RAW affect only ECC validation Date: Fri, 5 Feb 2010 01:30:50 +0200 Message-Id: <1265326257-4446-11-git-send-email-maximlevitsky@gmail.com> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1265326257-4446-1-git-send-email-maximlevitsky@gmail.com> References: <1265326257-4446-1-git-send-email-maximlevitsky@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3190 Lines: 103 This changes the behavier of MTD_OOB_RAW. It used to read both OOB and data to the data buffer, however you would still need to specify the dummy oob buffer. This is only used in one place, but makes it hard to read data+oob without ECC test, thus I removed that behavier, and fixed the user. Now MTD_OOB_RAW behaves like MTD_OOB_PLACE, but doesn't do ECC validation Signed-off-by: Maxim Levitsky --- drivers/mtd/nand/nand_base.c | 5 ----- drivers/mtd/nand/nand_bbt.c | 26 ++++++++++++++++++++++---- include/linux/mtd/mtd.h | 4 +--- 3 files changed, 23 insertions(+), 12 deletions(-) diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 405c538..8ff36be 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -1286,8 +1286,6 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, if (unlikely(oob)) { - /* Raw mode does data:oob:data:oob */ - if (ops->mode != MTD_OOB_RAW) { int toread = min(oobreadlen, max_oobsize); if (toread) { @@ -1295,9 +1293,6 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, oob, ops, toread); oobreadlen -= toread; } - } else - buf = nand_transfer_oob(chip, - buf, ops, mtd->oobsize); } if (!(chip->options & NAND_NO_READRDY)) { diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c index 55c23e5..387c45c 100644 --- a/drivers/mtd/nand/nand_bbt.c +++ b/drivers/mtd/nand/nand_bbt.c @@ -237,15 +237,33 @@ static int scan_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t offs, size_t len) { struct mtd_oob_ops ops; + int res; ops.mode = MTD_OOB_RAW; ops.ooboffs = 0; ops.ooblen = mtd->oobsize; - ops.oobbuf = buf; - ops.datbuf = buf; - ops.len = len; - return mtd->read_oob(mtd, offs, &ops); + + while (len > 0) { + if (len <= mtd->writesize) { + ops.oobbuf = buf + len; + ops.datbuf = buf; + ops.len = len; + return mtd->read_oob(mtd, offs, &ops); + } else { + ops.oobbuf = buf + mtd->writesize; + ops.datbuf = buf; + ops.len = mtd->writesize; + res = mtd->read_oob(mtd, offs, &ops); + + if (res) + return res; + } + + buf += mtd->oobsize + mtd->writesize; + len -= mtd->writesize; + } + return 0; } /* diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 662d747..84bb375 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -61,9 +61,7 @@ struct mtd_erase_region_info { * MTD_OOB_PLACE: oob data are placed at the given offset * MTD_OOB_AUTO: oob data are automatically placed at the free areas * which are defined by the ecclayout - * MTD_OOB_RAW: mode to read raw data+oob in one chunk. The oob data - * is inserted into the data. Thats a raw image of the - * flash contents. + * MTD_OOB_RAW: mode to read oob and data without doing ECC checking */ typedef enum { MTD_OOB_PLACE, -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/