From patchwork Wed Aug 15 02:38:45 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huang Shijie X-Patchwork-Id: 1320731 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 0FC333FC81 for ; Tue, 14 Aug 2012 14:46:42 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1T1IJq-0002Jz-Db; Tue, 14 Aug 2012 14:42:08 +0000 Received: from mail-gh0-f177.google.com ([209.85.160.177]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1T1IFp-0007Vo-AY; Tue, 14 Aug 2012 14:38:03 +0000 Received: by ghbf20 with SMTP id f20so545192ghb.36 for ; Tue, 14 Aug 2012 07:37:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer; bh=x17EqgLV/RDebRsY89sBbBLF9DXjzWs3Zvv0/CxHJDo=; b=wjeC9K8hrQ6EgcawQVMlbpxTZcDyfM75aONVVSKllZgQxI+jKHUkQtND9a8LNkU7gU 8QNOYTi5HOSAKe/N8jBuQ+ggFiNyP+hTYKGAtCKJk2X/RgZcL3dQQ0fxjshPtW6SusmW w34OOStOCGCnAT2GRJOC6SPweJ009/Z7WEvyHXQmtlpRctJKPXOWkPx4LNWRCFEmufZA RHNU+ap2kv5NoBGs32tRrJC4J6gYBaK/LXTriKRXO5lEUtbt1cj69D+qYRWFdrosHwle 3D8Ep8Wv8WcAlzKnldMwK/r213c7esQP1A6G6bJb7i5v7PuBblbQOLB8ucCclz6KJGNF v83g== Received: by 10.66.74.100 with SMTP id s4mr21337692pav.27.1344955073539; Tue, 14 Aug 2012 07:37:53 -0700 (PDT) Received: from localhost.localdomain.Home ([180.155.110.28]) by mx.google.com with ESMTPS id hr1sm822644pbc.23.2012.08.14.07.37.40 (version=SSLv3 cipher=OTHER); Tue, 14 Aug 2012 07:37:52 -0700 (PDT) From: Huang Shijie To: dwmw2@infradead.org Subject: [PATCH] mtd: kill MTD_NAND_VERIFY_WRITE Date: Tue, 14 Aug 2012 22:38:45 -0400 Message-Id: <1344998325-3279-1-git-send-email-shijie8@gmail.com> X-Mailer: git-send-email 1.7.4.4 X-Spam-Note: CRM114 invocation failed X-Spam-Score: 0.7 (/) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (0.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.160.177 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (shijie8[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 3.2 DATE_IN_FUTURE_12_24 Date: is 12 to 24 hours after Received: date 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (shijie8[at]gmail.com) -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature Cc: tony@atomide.com, paul.gortmaker@windriver.com, julia@diku.dk, laurent.pinchart@ideasonboard.com, jamie@jamieiles.com, ivan.djelic@parrot.com, Huang Shijie , stigge@antcom.de, mikedunn@newsguy.com, arnd@arndb.de, jkrzyszt@tis.icnet.pl, dbaryshkov@gmail.com, hechtb@gmail.com, manuel.lauss@googlemail.com, u.kleine-koenig@pengutronix.de, rmk+kernel@arm.linux.org.uk, axel.lin@gmail.com, marex@denx.de, mcuos.com@gmail.com, leiwen@marvell.com, s.hauer@pengutronix.de, b35362@freescale.com, scottwood@freescale.com, linux-arm-kernel@lists.infradead.org, maximlevitsky@gmail.com, fabio.estevam@freescale.com, sbranden@broadcom.com, dedekind1@gmail.com, nico@linaro.org, linux-kernel@vger.kernel.org, ralf@linux-mips.org, shmulik.ladkani@gmail.com, jdzheng@broadcom.com, linux-mtd@lists.infradead.org, computersforpeace@gmail.com, aletes.xgr@gmail.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Just as Artem suggested: "Both UBI and JFFS2 are able to read verify what they wrote already. There are also MTD tests which do this verification. So I think there is no reason to keep this in the NAND layer, let alone wasting RAM in the driver to support this feature." So kill MTD_NAND_VERIFY_WRITE entirely. Signed-off-by: Huang Shijie --- drivers/mtd/nand/Kconfig | 9 ----- drivers/mtd/nand/ams-delta.c | 13 -------- drivers/mtd/nand/au1550nd.c | 46 --------------------------- drivers/mtd/nand/bcm_umi_nand.c | 22 ------------- drivers/mtd/nand/cafe_nand.c | 7 ---- drivers/mtd/nand/cmx270_nand.c | 13 -------- drivers/mtd/nand/diskonchip.c | 63 -------------------------------------- drivers/mtd/nand/fsl_elbc_nand.c | 36 --------------------- drivers/mtd/nand/fsl_ifc_nand.c | 41 ------------------------ drivers/mtd/nand/gpio.c | 39 ----------------------- drivers/mtd/nand/lpc32xx_slc.c | 19 ----------- drivers/mtd/nand/mpc5121_nfc.c | 22 ------------- drivers/mtd/nand/mxc_nand.c | 9 ----- drivers/mtd/nand/nand_base.c | 53 -------------------------------- drivers/mtd/nand/nandsim.c | 16 --------- drivers/mtd/nand/ndfc.c | 13 -------- drivers/mtd/nand/nuc900_nand.c | 17 ---------- drivers/mtd/nand/omap2.c | 23 -------------- drivers/mtd/nand/pxa3xx_nand.c | 7 ---- drivers/mtd/nand/r852.c | 22 ------------- drivers/mtd/nand/sh_flctl.c | 11 ------ drivers/mtd/nand/socrates_nand.c | 19 ----------- drivers/mtd/nand/tmio_nand.c | 13 -------- drivers/mtd/nand/txx9ndfmc.c | 13 -------- include/linux/mtd/nand.h | 3 -- 25 files changed, 0 insertions(+), 549 deletions(-) diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index 588e989..0ca7257 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -22,15 +22,6 @@ menuconfig MTD_NAND if MTD_NAND -config MTD_NAND_VERIFY_WRITE - bool "Verify NAND page writes" - help - This adds an extra check when data is written to the flash. The - NAND flash device internally checks only bits transitioning - from 1 to 0. There is a rare possibility that even though the - device thinks the write was successful, a bit could have been - flipped accidentally due to device wear or something else. - config MTD_NAND_BCH tristate select BCH diff --git a/drivers/mtd/nand/ams-delta.c b/drivers/mtd/nand/ams-delta.c index 861ca8f..2d73f23 100644 --- a/drivers/mtd/nand/ams-delta.c +++ b/drivers/mtd/nand/ams-delta.c @@ -103,18 +103,6 @@ static void ams_delta_read_buf(struct mtd_info *mtd, u_char *buf, int len) buf[i] = ams_delta_read_byte(mtd); } -static int ams_delta_verify_buf(struct mtd_info *mtd, const u_char *buf, - int len) -{ - int i; - - for (i=0; iread_byte = ams_delta_read_byte; this->write_buf = ams_delta_write_buf; this->read_buf = ams_delta_read_buf; - this->verify_buf = ams_delta_verify_buf; this->cmd_ctrl = ams_delta_hwcontrol; if (gpio_request(AMS_DELTA_GPIO_PIN_NAND_RB, "nand_rdy") == 0) { this->dev_ready = ams_delta_nand_ready; diff --git a/drivers/mtd/nand/au1550nd.c b/drivers/mtd/nand/au1550nd.c index 9f609d2..5c47b20 100644 --- a/drivers/mtd/nand/au1550nd.c +++ b/drivers/mtd/nand/au1550nd.c @@ -141,28 +141,6 @@ static void au_read_buf(struct mtd_info *mtd, u_char *buf, int len) } /** - * au_verify_buf - Verify chip data against buffer - * @mtd: MTD device structure - * @buf: buffer containing the data to compare - * @len: number of bytes to compare - * - * verify function for 8bit buswidth - */ -static int au_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - int i; - struct nand_chip *this = mtd->priv; - - for (i = 0; i < len; i++) { - if (buf[i] != readb(this->IO_ADDR_R)) - return -EFAULT; - au_sync(); - } - - return 0; -} - -/** * au_write_buf16 - write buffer to chip * @mtd: MTD device structure * @buf: data buffer @@ -205,29 +183,6 @@ static void au_read_buf16(struct mtd_info *mtd, u_char *buf, int len) } } -/** - * au_verify_buf16 - Verify chip data against buffer - * @mtd: MTD device structure - * @buf: buffer containing the data to compare - * @len: number of bytes to compare - * - * verify function for 16bit buswidth - */ -static int au_verify_buf16(struct mtd_info *mtd, const u_char *buf, int len) -{ - int i; - struct nand_chip *this = mtd->priv; - u16 *p = (u16 *) buf; - len >>= 1; - - for (i = 0; i < len; i++) { - if (p[i] != readw(this->IO_ADDR_R)) - return -EFAULT; - au_sync(); - } - return 0; -} - /* Select the chip by setting nCE to low */ #define NAND_CTL_SETNCE 1 /* Deselect the chip by setting nCE to high */ @@ -516,7 +471,6 @@ static int __devinit au1550nd_probe(struct platform_device *pdev) this->read_word = au_read_word; this->write_buf = (pd->devwidth) ? au_write_buf16 : au_write_buf; this->read_buf = (pd->devwidth) ? au_read_buf16 : au_read_buf; - this->verify_buf = (pd->devwidth) ? au_verify_buf16 : au_verify_buf; ret = nand_scan(&ctx->info, 1); if (ret) { diff --git a/drivers/mtd/nand/bcm_umi_nand.c b/drivers/mtd/nand/bcm_umi_nand.c index c855e7c..3fcbcbc 100644 --- a/drivers/mtd/nand/bcm_umi_nand.c +++ b/drivers/mtd/nand/bcm_umi_nand.c @@ -332,27 +332,6 @@ static void bcm_umi_nand_read_buf(struct mtd_info *mtd, u_char * buf, int len) #endif } -static uint8_t readbackbuf[NAND_MAX_PAGESIZE]; -static int bcm_umi_nand_verify_buf(struct mtd_info *mtd, const u_char * buf, - int len) -{ - /* - * Try to readback page with ECC correction. This is necessary - * for MLC parts which may have permanently stuck bits. - */ - struct nand_chip *chip = mtd->priv; - int ret = chip->ecc.read_page(mtd, chip, readbackbuf, 0, 0); - if (ret < 0) - return -EFAULT; - else { - if (memcmp(readbackbuf, buf, len) == 0) - return 0; - - return -EFAULT; - } - return 0; -} - static int __devinit bcm_umi_nand_probe(struct platform_device *pdev) { struct nand_chip *this; @@ -416,7 +395,6 @@ static int __devinit bcm_umi_nand_probe(struct platform_device *pdev) this->write_buf = bcm_umi_nand_write_buf; this->read_buf = bcm_umi_nand_read_buf; - this->verify_buf = bcm_umi_nand_verify_buf; this->cmd_ctrl = bcm_umi_nand_hwcontrol; this->ecc.mode = NAND_ECC_HW; diff --git a/drivers/mtd/nand/cafe_nand.c b/drivers/mtd/nand/cafe_nand.c index 08248a0..2bb7170 100644 --- a/drivers/mtd/nand/cafe_nand.c +++ b/drivers/mtd/nand/cafe_nand.c @@ -576,13 +576,6 @@ static int cafe_nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, status = chip->waitfunc(mtd, chip); } -#ifdef CONFIG_MTD_NAND_VERIFY_WRITE - /* Send command to read back the data */ - chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); - - if (chip->verify_buf(mtd, buf, mtd->writesize)) - return -EIO; -#endif return 0; } diff --git a/drivers/mtd/nand/cmx270_nand.c b/drivers/mtd/nand/cmx270_nand.c index 1024bfc..39b2ef8 100644 --- a/drivers/mtd/nand/cmx270_nand.c +++ b/drivers/mtd/nand/cmx270_nand.c @@ -76,18 +76,6 @@ static void cmx270_read_buf(struct mtd_info *mtd, u_char *buf, int len) *buf++ = readl(this->IO_ADDR_R) >> 16; } -static int cmx270_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - int i; - struct nand_chip *this = mtd->priv; - - for (i=0; iIO_ADDR_R) >> 16)) - return -EFAULT; - - return 0; -} - static inline void nand_cs_on(void) { gpio_set_value(GPIO_NAND_CS, 0); @@ -209,7 +197,6 @@ static int __init cmx270_init(void) this->read_byte = cmx270_read_byte; this->read_buf = cmx270_read_buf; this->write_buf = cmx270_write_buf; - this->verify_buf = cmx270_verify_buf; /* Scan to find existence of the device */ if (nand_scan (cmx270_nand_mtd, 1)) { diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c index e2ca067..256eb30 100644 --- a/drivers/mtd/nand/diskonchip.c +++ b/drivers/mtd/nand/diskonchip.c @@ -376,19 +376,6 @@ static void doc2000_readbuf_dword(struct mtd_info *mtd, u_char *buf, int len) } } -static int doc2000_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) -{ - struct nand_chip *this = mtd->priv; - struct doc_priv *doc = this->priv; - void __iomem *docptr = doc->virtadr; - int i; - - for (i = 0; i < len; i++) - if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO)) - return -EFAULT; - return 0; -} - static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) { struct nand_chip *this = mtd->priv; @@ -526,26 +513,6 @@ static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len) buf[i] = ReadDOC(docptr, LastDataRead); } -static int doc2001_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) -{ - struct nand_chip *this = mtd->priv; - struct doc_priv *doc = this->priv; - void __iomem *docptr = doc->virtadr; - int i; - - /* Start read pipeline */ - ReadDOC(docptr, ReadPipeInit); - - for (i = 0; i < len - 1; i++) - if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { - ReadDOC(docptr, LastDataRead); - return i; - } - if (buf[i] != ReadDOC(docptr, LastDataRead)) - return i; - return 0; -} - static u_char doc2001plus_read_byte(struct mtd_info *mtd) { struct nand_chip *this = mtd->priv; @@ -610,33 +577,6 @@ static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len) printk("\n"); } -static int doc2001plus_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) -{ - struct nand_chip *this = mtd->priv; - struct doc_priv *doc = this->priv; - void __iomem *docptr = doc->virtadr; - int i; - - if (debug) - printk("verifybuf of %d bytes: ", len); - - /* Start read pipeline */ - ReadDOC(docptr, Mplus_ReadPipeInit); - ReadDOC(docptr, Mplus_ReadPipeInit); - - for (i = 0; i < len - 2; i++) - if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { - ReadDOC(docptr, Mplus_LastDataRead); - ReadDOC(docptr, Mplus_LastDataRead); - return i; - } - if (buf[len - 2] != ReadDOC(docptr, Mplus_LastDataRead)) - return len - 2; - if (buf[len - 1] != ReadDOC(docptr, Mplus_LastDataRead)) - return len - 1; - return 0; -} - static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) { struct nand_chip *this = mtd->priv; @@ -1432,7 +1372,6 @@ static inline int __init doc2000_init(struct mtd_info *mtd) this->read_byte = doc2000_read_byte; this->write_buf = doc2000_writebuf; this->read_buf = doc2000_readbuf; - this->verify_buf = doc2000_verifybuf; this->scan_bbt = nftl_scan_bbt; doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; @@ -1449,7 +1388,6 @@ static inline int __init doc2001_init(struct mtd_info *mtd) this->read_byte = doc2001_read_byte; this->write_buf = doc2001_writebuf; this->read_buf = doc2001_readbuf; - this->verify_buf = doc2001_verifybuf; ReadDOC(doc->virtadr, ChipID); ReadDOC(doc->virtadr, ChipID); @@ -1480,7 +1418,6 @@ static inline int __init doc2001plus_init(struct mtd_info *mtd) this->read_byte = doc2001plus_read_byte; this->write_buf = doc2001plus_writebuf; this->read_buf = doc2001plus_readbuf; - this->verify_buf = doc2001plus_verifybuf; this->scan_bbt = inftl_scan_bbt; this->cmd_ctrl = NULL; this->select_chip = doc2001plus_select_chip; diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c index 8143873..cc1480a 100644 --- a/drivers/mtd/nand/fsl_elbc_nand.c +++ b/drivers/mtd/nand/fsl_elbc_nand.c @@ -614,41 +614,6 @@ static void fsl_elbc_read_buf(struct mtd_info *mtd, u8 *buf, int len) len, avail); } -/* - * Verify buffer against the FCM Controller Data Buffer - */ -static int fsl_elbc_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - struct nand_chip *chip = mtd->priv; - struct fsl_elbc_mtd *priv = chip->priv; - struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = priv->ctrl->nand; - int i; - - if (len < 0) { - dev_err(priv->dev, "write_buf of %d bytes", len); - return -EINVAL; - } - - if ((unsigned int)len > - elbc_fcm_ctrl->read_bytes - elbc_fcm_ctrl->index) { - dev_err(priv->dev, - "verify_buf beyond end of buffer " - "(%d requested, %u available)\n", - len, elbc_fcm_ctrl->read_bytes - elbc_fcm_ctrl->index); - - elbc_fcm_ctrl->index = elbc_fcm_ctrl->read_bytes; - return -EINVAL; - } - - for (i = 0; i < len; i++) - if (in_8(&elbc_fcm_ctrl->addr[elbc_fcm_ctrl->index + i]) - != buf[i]) - break; - - elbc_fcm_ctrl->index += len; - return i == len && elbc_fcm_ctrl->status == LTESR_CC ? 0 : -EIO; -} - /* This function is called after Program and Erase Operations to * check for success or failure. */ @@ -798,7 +763,6 @@ static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv) chip->read_byte = fsl_elbc_read_byte; chip->write_buf = fsl_elbc_write_buf; chip->read_buf = fsl_elbc_read_buf; - chip->verify_buf = fsl_elbc_verify_buf; chip->select_chip = fsl_elbc_select_chip; chip->cmdfunc = fsl_elbc_cmdfunc; chip->waitfunc = fsl_elbc_wait; diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c index 1f71b54..e92d223 100644 --- a/drivers/mtd/nand/fsl_ifc_nand.c +++ b/drivers/mtd/nand/fsl_ifc_nand.c @@ -627,46 +627,6 @@ static void fsl_ifc_read_buf(struct mtd_info *mtd, u8 *buf, int len) } /* - * Verify buffer against the IFC Controller Data Buffer - */ -static int fsl_ifc_verify_buf(struct mtd_info *mtd, - const u_char *buf, int len) -{ - struct nand_chip *chip = mtd->priv; - struct fsl_ifc_mtd *priv = chip->priv; - struct fsl_ifc_ctrl *ctrl = priv->ctrl; - struct fsl_ifc_nand_ctrl *nctrl = ifc_nand_ctrl; - int i; - - if (len < 0) { - dev_err(priv->dev, "%s: write_buf of %d bytes", __func__, len); - return -EINVAL; - } - - if ((unsigned int)len > nctrl->read_bytes - nctrl->index) { - dev_err(priv->dev, - "%s: beyond end of buffer (%d requested, %u available)\n", - __func__, len, nctrl->read_bytes - nctrl->index); - - nctrl->index = nctrl->read_bytes; - return -EINVAL; - } - - for (i = 0; i < len; i++) - if (in_8(&nctrl->addr[nctrl->index + i]) != buf[i]) - break; - - nctrl->index += len; - - if (i != len) - return -EIO; - if (ctrl->nand_stat != IFC_NAND_EVTER_STAT_OPC) - return -EIO; - - return 0; -} - -/* * This function is called after Program and Erase Operations to * check for success or failure. */ @@ -796,7 +756,6 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv) chip->write_buf = fsl_ifc_write_buf; chip->read_buf = fsl_ifc_read_buf; - chip->verify_buf = fsl_ifc_verify_buf; chip->select_chip = fsl_ifc_select_chip; chip->cmdfunc = fsl_ifc_cmdfunc; chip->waitfunc = fsl_ifc_wait; diff --git a/drivers/mtd/nand/gpio.c b/drivers/mtd/nand/gpio.c index 27000a5..ce6a284 100644 --- a/drivers/mtd/nand/gpio.c +++ b/drivers/mtd/nand/gpio.c @@ -100,23 +100,6 @@ static void gpio_nand_readbuf(struct mtd_info *mtd, u_char *buf, int len) readsb(this->IO_ADDR_R, buf, len); } -static int gpio_nand_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) -{ - struct nand_chip *this = mtd->priv; - unsigned char read, *p = (unsigned char *) buf; - int i, err = 0; - - for (i = 0; i < len; i++) { - read = readb(this->IO_ADDR_R); - if (read != p[i]) { - pr_debug("%s: err at %d (read %04x vs %04x)\n", - __func__, i, read, p[i]); - err = -EFAULT; - } - } - return err; -} - static void gpio_nand_writebuf16(struct mtd_info *mtd, const u_char *buf, int len) { @@ -148,26 +131,6 @@ static void gpio_nand_readbuf16(struct mtd_info *mtd, u_char *buf, int len) } } -static int gpio_nand_verifybuf16(struct mtd_info *mtd, const u_char *buf, - int len) -{ - struct nand_chip *this = mtd->priv; - unsigned short read, *p = (unsigned short *) buf; - int i, err = 0; - len >>= 1; - - for (i = 0; i < len; i++) { - read = readw(this->IO_ADDR_R); - if (read != p[i]) { - pr_debug("%s: err at %d (read %04x vs %04x)\n", - __func__, i, read, p[i]); - err = -EFAULT; - } - } - return err; -} - - static int gpio_nand_devready(struct mtd_info *mtd) { struct gpiomtd *gpiomtd = gpio_nand_getpriv(mtd); @@ -391,11 +354,9 @@ static int __devinit gpio_nand_probe(struct platform_device *dev) if (this->options & NAND_BUSWIDTH_16) { this->read_buf = gpio_nand_readbuf16; this->write_buf = gpio_nand_writebuf16; - this->verify_buf = gpio_nand_verifybuf16; } else { this->read_buf = gpio_nand_readbuf; this->write_buf = gpio_nand_writebuf; - this->verify_buf = gpio_nand_verifybuf; } /* set the mtd private data for the nand driver */ diff --git a/drivers/mtd/nand/lpc32xx_slc.c b/drivers/mtd/nand/lpc32xx_slc.c index c8c1d06..6d7d3cb 100644 --- a/drivers/mtd/nand/lpc32xx_slc.c +++ b/drivers/mtd/nand/lpc32xx_slc.c @@ -368,24 +368,6 @@ static void lpc32xx_nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int } /* - * Verify data in buffer to data on device - */ -static int lpc32xx_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) -{ - struct nand_chip *chip = mtd->priv; - struct lpc32xx_nand_host *host = chip->priv; - int i; - - /* DATA register must be read as 32 bits or it will fail */ - for (i = 0; i < len; i++) { - if (buf[i] != (uint8_t)readl(SLC_DATA(host->io_base))) - return -EFAULT; - } - - return 0; -} - -/* * Read the OOB data from the device without ECC using FIFO method */ static int lpc32xx_nand_read_oob_syndrome(struct mtd_info *mtd, @@ -862,7 +844,6 @@ static int __devinit lpc32xx_nand_probe(struct platform_device *pdev) chip->ecc.correct = nand_correct_data; chip->ecc.strength = 1; chip->ecc.hwctl = lpc32xx_nand_ecc_enable; - chip->verify_buf = lpc32xx_verify_buf; /* bitflip_threshold's default is defined as ecc_strength anyway. * Unfortunately, it is set only later at add_mtd_device(). Meanwhile diff --git a/drivers/mtd/nand/mpc5121_nfc.c b/drivers/mtd/nand/mpc5121_nfc.c index c259c24..f776c85 100644 --- a/drivers/mtd/nand/mpc5121_nfc.c +++ b/drivers/mtd/nand/mpc5121_nfc.c @@ -506,27 +506,6 @@ static void mpc5121_nfc_write_buf(struct mtd_info *mtd, mpc5121_nfc_buf_copy(mtd, (u_char *)buf, len, 1); } -/* Compare buffer with NAND flash */ -static int mpc5121_nfc_verify_buf(struct mtd_info *mtd, - const u_char *buf, int len) -{ - u_char tmp[256]; - uint bsize; - - while (len) { - bsize = min(len, 256); - mpc5121_nfc_read_buf(mtd, tmp, bsize); - - if (memcmp(buf, tmp, bsize)) - return 1; - - buf += bsize; - len -= bsize; - } - - return 0; -} - /* Read byte from NFC buffers */ static u8 mpc5121_nfc_read_byte(struct mtd_info *mtd) { @@ -732,7 +711,6 @@ static int __devinit mpc5121_nfc_probe(struct platform_device *op) chip->read_word = mpc5121_nfc_read_word; chip->read_buf = mpc5121_nfc_read_buf; chip->write_buf = mpc5121_nfc_write_buf; - chip->verify_buf = mpc5121_nfc_verify_buf; chip->select_chip = mpc5121_nfc_select_chip; chip->bbt_options = NAND_BBT_USE_FLASH; chip->ecc.mode = NAND_ECC_SOFT; diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index 3f94e1f..bfee9eb 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -746,14 +746,6 @@ static void mxc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) host->buf_start += n; } -/* Used by the upper layer to verify the data in NAND Flash - * with the data in the buf. */ -static int mxc_nand_verify_buf(struct mtd_info *mtd, - const u_char *buf, int len) -{ - return -EFAULT; -} - /* This function is used by upper layer for select and * deselect of the NAND chip */ static void mxc_nand_select_chip_v1_v3(struct mtd_info *mtd, int chip) @@ -1406,7 +1398,6 @@ static int __init mxcnd_probe(struct platform_device *pdev) this->read_word = mxc_nand_read_word; this->write_buf = mxc_nand_write_buf; this->read_buf = mxc_nand_read_buf; - this->verify_buf = mxc_nand_verify_buf; host->clk = devm_clk_get(&pdev->dev, "nfc"); if (IS_ERR(host->clk)) diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index ead301a..5a1689a 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -243,25 +243,6 @@ static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) } /** - * nand_verify_buf - [DEFAULT] Verify chip data against buffer - * @mtd: MTD device structure - * @buf: buffer containing the data to compare - * @len: number of bytes to compare - * - * Default verify function for 8bit buswidth. - */ -static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) -{ - int i; - struct nand_chip *chip = mtd->priv; - - for (i = 0; i < len; i++) - if (buf[i] != readb(chip->IO_ADDR_R)) - return -EFAULT; - return 0; -} - -/** * nand_write_buf16 - [DEFAULT] write buffer to chip * @mtd: MTD device structure * @buf: data buffer @@ -301,28 +282,6 @@ static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len) } /** - * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer - * @mtd: MTD device structure - * @buf: buffer containing the data to compare - * @len: number of bytes to compare - * - * Default verify function for 16bit buswidth. - */ -static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) -{ - int i; - struct nand_chip *chip = mtd->priv; - u16 *p = (u16 *) buf; - len >>= 1; - - for (i = 0; i < len; i++) - if (p[i] != readw(chip->IO_ADDR_R)) - return -EFAULT; - - return 0; -} - -/** * nand_block_bad - [DEFAULT] Read bad block marker from the chip * @mtd: MTD device structure * @ofs: offset from device start @@ -2120,16 +2079,6 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, status = chip->waitfunc(mtd, chip); } -#ifdef CONFIG_MTD_NAND_VERIFY_WRITE - /* Send command to read back the data */ - chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); - - if (chip->verify_buf(mtd, buf, mtd->writesize)) - return -EIO; - - /* Make sure the next page prog is preceded by a status read */ - chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); -#endif return 0; } @@ -2804,8 +2753,6 @@ static void nand_set_defaults(struct nand_chip *chip, int busw) chip->write_buf = busw ? nand_write_buf16 : nand_write_buf; if (!chip->read_buf) chip->read_buf = busw ? nand_read_buf16 : nand_read_buf; - if (!chip->verify_buf) - chip->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf; if (!chip->scan_bbt) chip->scan_bbt = nand_default_bbt; diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c index cf0cd31..21e64b5 100644 --- a/drivers/mtd/nand/nandsim.c +++ b/drivers/mtd/nand/nandsim.c @@ -447,8 +447,6 @@ static unsigned int rptwear_cnt = 0; /* MTD structure for NAND controller */ static struct mtd_info *nsmtd; -static u_char ns_verify_buf[NS_LARGEST_PAGE_SIZE]; - /* * Allocate array of page pointers, create slab allocation for an array * and initialize the array by NULL pointers. @@ -2189,19 +2187,6 @@ static void ns_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) return; } -static int ns_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - ns_nand_read_buf(mtd, (u_char *)&ns_verify_buf[0], len); - - if (!memcmp(buf, &ns_verify_buf[0], len)) { - NS_DBG("verify_buf: the buffer is OK\n"); - return 0; - } else { - NS_DBG("verify_buf: the buffer is wrong\n"); - return -EFAULT; - } -} - /* * Module initialization function */ @@ -2236,7 +2221,6 @@ static int __init ns_init_module(void) chip->dev_ready = ns_device_ready; chip->write_buf = ns_nand_write_buf; chip->read_buf = ns_nand_read_buf; - chip->verify_buf = ns_nand_verify_buf; chip->read_word = ns_nand_read_word; chip->ecc.mode = NAND_ECC_SOFT; /* The NAND_SKIP_BBTSCAN option is necessary for 'overridesize' */ diff --git a/drivers/mtd/nand/ndfc.c b/drivers/mtd/nand/ndfc.c index 2b6f632..5fd3f01 100644 --- a/drivers/mtd/nand/ndfc.c +++ b/drivers/mtd/nand/ndfc.c @@ -140,18 +140,6 @@ static void ndfc_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) out_be32(ndfc->ndfcbase + NDFC_DATA, *p++); } -static int ndfc_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) -{ - struct nand_chip *chip = mtd->priv; - struct ndfc_controller *ndfc = chip->priv; - uint32_t *p = (uint32_t *) buf; - - for(;len > 0; len -= 4) - if (*p++ != in_be32(ndfc->ndfcbase + NDFC_DATA)) - return -EFAULT; - return 0; -} - /* * Initialize chip structure */ @@ -172,7 +160,6 @@ static int ndfc_chip_init(struct ndfc_controller *ndfc, chip->controller = &ndfc->ndfc_control; chip->read_buf = ndfc_read_buf; chip->write_buf = ndfc_write_buf; - chip->verify_buf = ndfc_verify_buf; chip->ecc.correct = nand_correct_data; chip->ecc.hwctl = ndfc_enable_hwecc; chip->ecc.calculate = ndfc_calculate_ecc; diff --git a/drivers/mtd/nand/nuc900_nand.c b/drivers/mtd/nand/nuc900_nand.c index 8febe46..94dc46b 100644 --- a/drivers/mtd/nand/nuc900_nand.c +++ b/drivers/mtd/nand/nuc900_nand.c @@ -112,22 +112,6 @@ static void nuc900_nand_write_buf(struct mtd_info *mtd, write_data_reg(nand, buf[i]); } -static int nuc900_verify_buf(struct mtd_info *mtd, - const unsigned char *buf, int len) -{ - int i; - struct nuc900_nand *nand; - - nand = container_of(mtd, struct nuc900_nand, mtd); - - for (i = 0; i < len; i++) { - if (buf[i] != (unsigned char)read_data_reg(nand)) - return -EFAULT; - } - - return 0; -} - static int nuc900_check_rb(struct nuc900_nand *nand) { unsigned int val; @@ -292,7 +276,6 @@ static int __devinit nuc900_nand_probe(struct platform_device *pdev) chip->read_byte = nuc900_nand_read_byte; chip->write_buf = nuc900_nand_write_buf; chip->read_buf = nuc900_nand_read_buf; - chip->verify_buf = nuc900_verify_buf; chip->chip_delay = 50; chip->options = 0; chip->ecc.mode = NAND_ECC_SOFT; diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c index ac4fd75..1c46300 100644 --- a/drivers/mtd/nand/omap2.c +++ b/drivers/mtd/nand/omap2.c @@ -614,27 +614,6 @@ out_copy: } /** - * omap_verify_buf - Verify chip data against buffer - * @mtd: MTD device structure - * @buf: buffer containing the data to compare - * @len: number of bytes to compare - */ -static int omap_verify_buf(struct mtd_info *mtd, const u_char * buf, int len) -{ - struct omap_nand_info *info = container_of(mtd, struct omap_nand_info, - mtd); - u16 *p = (u16 *) buf; - - len >>= 1; - while (len--) { - if (*p++ != cpu_to_le16(readw(info->nand.IO_ADDR_R))) - return -EFAULT; - } - - return 0; -} - -/** * gen_true_ecc - This function will generate true ECC value * @ecc_buf: buffer to store ecc code * @@ -1285,8 +1264,6 @@ static int __devinit omap_nand_probe(struct platform_device *pdev) goto out_release_mem_region; } - info->nand.verify_buf = omap_verify_buf; - /* selsect the ecc type */ if (pdata->ecc_opt == OMAP_ECC_HAMMING_CODE_DEFAULT) info->nand.ecc.mode = NAND_ECC_SOFT; diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index e8a1ae9..5df91d5 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -771,12 +771,6 @@ static void pxa3xx_nand_write_buf(struct mtd_info *mtd, info->buf_start += real_len; } -static int pxa3xx_nand_verify_buf(struct mtd_info *mtd, - const uint8_t *buf, int len) -{ - return 0; -} - static void pxa3xx_nand_select_chip(struct mtd_info *mtd, int chip) { return; @@ -1069,7 +1063,6 @@ static int alloc_nand_resource(struct platform_device *pdev) chip->read_byte = pxa3xx_nand_read_byte; chip->read_buf = pxa3xx_nand_read_buf; chip->write_buf = pxa3xx_nand_write_buf; - chip->verify_buf = pxa3xx_nand_verify_buf; } spin_lock_init(&chip->controller->lock); diff --git a/drivers/mtd/nand/r852.c b/drivers/mtd/nand/r852.c index 8cb6277..4495f85 100644 --- a/drivers/mtd/nand/r852.c +++ b/drivers/mtd/nand/r852.c @@ -309,27 +309,6 @@ static uint8_t r852_read_byte(struct mtd_info *mtd) return r852_read_reg(dev, R852_DATALINE); } - -/* - * Readback the buffer to verify it - */ -int r852_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) -{ - struct r852_device *dev = r852_get_dev(mtd); - - /* We can't be sure about anything here... */ - if (dev->card_unstable) - return -1; - - /* This will never happen, unless you wired up a nand chip - with > 512 bytes page size to the reader */ - if (len > SM_SECTOR_SIZE) - return 0; - - r852_read_buf(mtd, dev->tmp_buffer, len); - return memcmp(buf, dev->tmp_buffer, len); -} - /* * Control several chip lines & send commands */ @@ -882,7 +861,6 @@ int r852_probe(struct pci_dev *pci_dev, const struct pci_device_id *id) chip->read_byte = r852_read_byte; chip->read_buf = r852_read_buf; chip->write_buf = r852_write_buf; - chip->verify_buf = r852_verify_buf; /* ecc */ chip->ecc.mode = NAND_ECC_HW_SYNDROME; diff --git a/drivers/mtd/nand/sh_flctl.c b/drivers/mtd/nand/sh_flctl.c index 0b798fb..319ffb4 100644 --- a/drivers/mtd/nand/sh_flctl.c +++ b/drivers/mtd/nand/sh_flctl.c @@ -788,16 +788,6 @@ static void flctl_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) flctl->index += len; } -static int flctl_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - int i; - - for (i = 0; i < len; i++) - if (buf[i] != flctl_read_byte(mtd)) - return -EFAULT; - return 0; -} - static int flctl_chip_init_tail(struct mtd_info *mtd) { struct sh_flctl *flctl = mtd_to_flctl(mtd); @@ -931,7 +921,6 @@ static int __devinit flctl_probe(struct platform_device *pdev) nand->read_byte = flctl_read_byte; nand->write_buf = flctl_write_buf; nand->read_buf = flctl_read_buf; - nand->verify_buf = flctl_verify_buf; nand->select_chip = flctl_select_chip; nand->cmdfunc = flctl_cmdfunc; diff --git a/drivers/mtd/nand/socrates_nand.c b/drivers/mtd/nand/socrates_nand.c index e02b08b..f3f28fa 100644 --- a/drivers/mtd/nand/socrates_nand.c +++ b/drivers/mtd/nand/socrates_nand.c @@ -98,24 +98,6 @@ static uint16_t socrates_nand_read_word(struct mtd_info *mtd) return word; } -/** - * socrates_nand_verify_buf - Verify chip data against buffer - * @mtd: MTD device structure - * @buf: buffer containing the data to compare - * @len: number of bytes to compare - */ -static int socrates_nand_verify_buf(struct mtd_info *mtd, const u8 *buf, - int len) -{ - int i; - - for (i = 0; i < len; i++) { - if (buf[i] != socrates_nand_read_byte(mtd)) - return -EFAULT; - } - return 0; -} - /* * Hardware specific access to control-lines */ @@ -201,7 +183,6 @@ static int __devinit socrates_nand_probe(struct platform_device *ofdev) nand_chip->read_word = socrates_nand_read_word; nand_chip->write_buf = socrates_nand_write_buf; nand_chip->read_buf = socrates_nand_read_buf; - nand_chip->verify_buf = socrates_nand_verify_buf; nand_chip->dev_ready = socrates_nand_device_ready; nand_chip->ecc.mode = NAND_ECC_SOFT; /* enable ECC */ diff --git a/drivers/mtd/nand/tmio_nand.c b/drivers/mtd/nand/tmio_nand.c index 5aa5180..508e9e0 100644 --- a/drivers/mtd/nand/tmio_nand.c +++ b/drivers/mtd/nand/tmio_nand.c @@ -256,18 +256,6 @@ static void tmio_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) tmio_ioread16_rep(tmio->fcr + FCR_DATA, buf, len >> 1); } -static int -tmio_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - struct tmio_nand *tmio = mtd_to_tmio(mtd); - u16 *p = (u16 *) buf; - - for (len >>= 1; len; len--) - if (*(p++) != tmio_ioread16(tmio->fcr + FCR_DATA)) - return -EFAULT; - return 0; -} - static void tmio_nand_enable_hwecc(struct mtd_info *mtd, int mode) { struct tmio_nand *tmio = mtd_to_tmio(mtd); @@ -424,7 +412,6 @@ static int tmio_probe(struct platform_device *dev) nand_chip->read_byte = tmio_nand_read_byte; nand_chip->write_buf = tmio_nand_write_buf; nand_chip->read_buf = tmio_nand_read_buf; - nand_chip->verify_buf = tmio_nand_verify_buf; /* set eccmode using hardware ECC */ nand_chip->ecc.mode = NAND_ECC_HW; diff --git a/drivers/mtd/nand/txx9ndfmc.c b/drivers/mtd/nand/txx9ndfmc.c index 26398dc..e3d7266 100644 --- a/drivers/mtd/nand/txx9ndfmc.c +++ b/drivers/mtd/nand/txx9ndfmc.c @@ -131,18 +131,6 @@ static void txx9ndfmc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) *buf++ = __raw_readl(ndfdtr); } -static int txx9ndfmc_verify_buf(struct mtd_info *mtd, const uint8_t *buf, - int len) -{ - struct platform_device *dev = mtd_to_platdev(mtd); - void __iomem *ndfdtr = ndregaddr(dev, TXX9_NDFDTR); - - while (len--) - if (*buf++ != (uint8_t)__raw_readl(ndfdtr)) - return -EFAULT; - return 0; -} - static void txx9ndfmc_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) { @@ -346,7 +334,6 @@ static int __init txx9ndfmc_probe(struct platform_device *dev) chip->read_byte = txx9ndfmc_read_byte; chip->read_buf = txx9ndfmc_read_buf; chip->write_buf = txx9ndfmc_write_buf; - chip->verify_buf = txx9ndfmc_verify_buf; chip->cmd_ctrl = txx9ndfmc_cmd_ctrl; chip->dev_ready = txx9ndfmc_dev_ready; chip->ecc.calculate = txx9ndfmc_calculate_ecc; diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 6dce5a7..9be3873 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -397,8 +397,6 @@ struct nand_buffers { * @read_word: [REPLACEABLE] read one word from the chip * @write_buf: [REPLACEABLE] write data from the buffer to the chip * @read_buf: [REPLACEABLE] read data from the chip into the buffer - * @verify_buf: [REPLACEABLE] verify buffer contents against the chip - * data. * @select_chip: [REPLACEABLE] select chip nr * @block_bad: [REPLACEABLE] check, if the block is bad * @block_markbad: [REPLACEABLE] mark the block bad @@ -481,7 +479,6 @@ struct nand_chip { u16 (*read_word)(struct mtd_info *mtd); void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len); void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len); - int (*verify_buf)(struct mtd_info *mtd, const uint8_t *buf, int len); void (*select_chip)(struct mtd_info *mtd, int chip); int (*block_bad)(struct mtd_info *mtd, loff_t ofs, int getchip); int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);