From 3e63b26bdd4069c3df2cd7ce7217a21d06801b41 Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Fri, 30 Oct 2015 20:33:22 -0700 Subject: mtd: {nand,spi-nor}: assign MTD of_node We should pass along our flash DT node to the MTD layer, so it can set up ofpart for us. Signed-off-by: Brian Norris Reviewed-by: Boris Brezillon --- drivers/mtd/nand/nand_base.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/mtd/nand/nand_base.c') diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index cc74142938b0..939ab3d5acc2 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -3990,6 +3990,9 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips, int ret; if (chip->flash_node) { + /* MTD can automatically handle DT partitions, etc. */ + mtd_set_of_node(mtd, chip->flash_node); + ret = nand_dt_init(mtd, chip, chip->flash_node); if (ret) return ret; -- cgit v1.2.3 From 44ec23c9ecd95d13ec9dd8d0b0dc9e82bd3258ff Mon Sep 17 00:00:00 2001 From: Boris BREZILLON Date: Mon, 2 Nov 2015 00:03:38 +0100 Subject: mtd: nand: convert to nand_get_flash_node() Used semantic patch with 'make coccicheck MODE=patch COCCI=script.cocci': ---8<---- virtual patch @@ struct nand_chip c; struct nand_chip *cp; @@ ( -(cp)->flash_node +nand_get_flash_node(cp) | -(c).flash_node +nand_get_flash_node(&c) ) ---8<---- Signed-off-by: Boris Brezillon Signed-off-by: Brian Norris --- drivers/mtd/nand/brcmnand/brcmnand.c | 2 +- drivers/mtd/nand/nand_base.c | 6 +++--- drivers/mtd/nand/vf610_nfc.c | 6 +++--- 3 files changed, 7 insertions(+), 7 deletions(-) (limited to 'drivers/mtd/nand/nand_base.c') diff --git a/drivers/mtd/nand/brcmnand/brcmnand.c b/drivers/mtd/nand/brcmnand/brcmnand.c index a37659de025c..2a437c7ed175 100644 --- a/drivers/mtd/nand/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/brcmnand/brcmnand.c @@ -1816,7 +1816,7 @@ static int brcmnand_setup_dev(struct brcmnand_host *host) memset(cfg, 0, sizeof(*cfg)); - ret = of_property_read_u32(chip->flash_node, + ret = of_property_read_u32(nand_get_flash_node(chip), "brcm,nand-oob-sector-size", &oob_sector); if (ret) { diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 939ab3d5acc2..4ac4efe65c62 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -3989,11 +3989,11 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips, struct nand_flash_dev *type; int ret; - if (chip->flash_node) { + if (nand_get_flash_node(chip)) { /* MTD can automatically handle DT partitions, etc. */ - mtd_set_of_node(mtd, chip->flash_node); + mtd_set_of_node(mtd, nand_get_flash_node(chip)); - ret = nand_dt_init(mtd, chip, chip->flash_node); + ret = nand_dt_init(mtd, chip, nand_get_flash_node(chip)); if (ret) return ret; } diff --git a/drivers/mtd/nand/vf610_nfc.c b/drivers/mtd/nand/vf610_nfc.c index b6df4c6d60ca..1c86c6b42515 100644 --- a/drivers/mtd/nand/vf610_nfc.c +++ b/drivers/mtd/nand/vf610_nfc.c @@ -707,7 +707,7 @@ static int vf610_nfc_probe(struct platform_device *pdev) for_each_available_child_of_node(nfc->dev->of_node, child) { if (of_device_is_compatible(child, "fsl,vf610-nfc-nandcs")) { - if (chip->flash_node) { + if (nand_get_flash_node(chip)) { dev_err(nfc->dev, "Only one NAND chip supported!\n"); err = -EINVAL; @@ -718,7 +718,7 @@ static int vf610_nfc_probe(struct platform_device *pdev) } } - if (!chip->flash_node) { + if (!nand_get_flash_node(chip)) { dev_err(nfc->dev, "NAND chip sub-node missing!\n"); err = -ENODEV; goto err_clk; @@ -814,7 +814,7 @@ static int vf610_nfc_probe(struct platform_device *pdev) return mtd_device_register(mtd, NULL, 0); error: - of_node_put(chip->flash_node); + of_node_put(nand_get_flash_node(chip)); err_clk: clk_disable_unprepare(nfc->clk); return err; -- cgit v1.2.3 From 862eba519e79c48fb6ee276081ddb98fe6926f02 Mon Sep 17 00:00:00 2001 From: Boris BREZILLON Date: Tue, 1 Dec 2015 12:03:03 +0100 Subject: mtd: nand: make use of mtd_to_nand() in NAND core code mtd_to_nand() was recently introduced to avoid direct access to the mtd->priv field. Update core code to use mtd_to_nand(). Signed-off-by: Boris Brezillon Signed-off-by: Brian Norris --- drivers/mtd/nand/nand_base.c | 84 ++++++++++++++++++++++---------------------- drivers/mtd/nand/nand_bbt.c | 32 ++++++++--------- drivers/mtd/nand/nand_bch.c | 4 +-- drivers/mtd/nand/nand_ecc.c | 4 +-- drivers/mtd/nand/nandsim.c | 18 +++++----- 5 files changed, 71 insertions(+), 71 deletions(-) (limited to 'drivers/mtd/nand/nand_base.c') diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 0748a13fc2be..5aec1545cd39 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -106,7 +106,7 @@ DEFINE_LED_TRIGGER(nand_led_trigger); static int check_offs_len(struct mtd_info *mtd, loff_t ofs, uint64_t len) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); int ret = 0; /* Start address must align on block boundary */ @@ -132,7 +132,7 @@ static int check_offs_len(struct mtd_info *mtd, */ static void nand_release_device(struct mtd_info *mtd) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); /* Release the controller and the chip */ spin_lock(&chip->controller->lock); @@ -150,7 +150,7 @@ static void nand_release_device(struct mtd_info *mtd) */ static uint8_t nand_read_byte(struct mtd_info *mtd) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); return readb(chip->IO_ADDR_R); } @@ -163,7 +163,7 @@ static uint8_t nand_read_byte(struct mtd_info *mtd) */ static uint8_t nand_read_byte16(struct mtd_info *mtd) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); return (uint8_t) cpu_to_le16(readw(chip->IO_ADDR_R)); } @@ -175,7 +175,7 @@ static uint8_t nand_read_byte16(struct mtd_info *mtd) */ static u16 nand_read_word(struct mtd_info *mtd) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); return readw(chip->IO_ADDR_R); } @@ -188,7 +188,7 @@ static u16 nand_read_word(struct mtd_info *mtd) */ static void nand_select_chip(struct mtd_info *mtd, int chipnr) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); switch (chipnr) { case -1: @@ -211,7 +211,7 @@ static void nand_select_chip(struct mtd_info *mtd, int chipnr) */ static void nand_write_byte(struct mtd_info *mtd, uint8_t byte) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); chip->write_buf(mtd, &byte, 1); } @@ -225,7 +225,7 @@ static void nand_write_byte(struct mtd_info *mtd, uint8_t byte) */ static void nand_write_byte16(struct mtd_info *mtd, uint8_t byte) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); uint16_t word = byte; /* @@ -257,7 +257,7 @@ static void nand_write_byte16(struct mtd_info *mtd, uint8_t byte) */ static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); iowrite8_rep(chip->IO_ADDR_W, buf, len); } @@ -272,7 +272,7 @@ static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) */ static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); ioread8_rep(chip->IO_ADDR_R, buf, len); } @@ -287,7 +287,7 @@ static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) */ static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); u16 *p = (u16 *) buf; iowrite16_rep(chip->IO_ADDR_W, p, len >> 1); @@ -303,7 +303,7 @@ static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) */ static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); u16 *p = (u16 *) buf; ioread16_rep(chip->IO_ADDR_R, p, len >> 1); @@ -320,7 +320,7 @@ static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len) static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) { int page, chipnr, res = 0, i = 0; - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); u16 bad; if (chip->bbt_options & NAND_BBT_SCANLASTPAGE) @@ -380,7 +380,7 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) */ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); struct mtd_oob_ops ops; uint8_t buf[2] = { 0, 0 }; int ret = 0, res, i = 0; @@ -430,7 +430,7 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) */ static int nand_block_markbad_lowlevel(struct mtd_info *mtd, loff_t ofs) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); int res, ret = 0; if (!(chip->bbt_options & NAND_BBT_NO_OOB_BBM)) { @@ -471,7 +471,7 @@ static int nand_block_markbad_lowlevel(struct mtd_info *mtd, loff_t ofs) */ static int nand_check_wp(struct mtd_info *mtd) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); /* Broken xD cards report WP despite being writable */ if (chip->options & NAND_BROKEN_XD) @@ -491,7 +491,7 @@ static int nand_check_wp(struct mtd_info *mtd) */ static int nand_block_isreserved(struct mtd_info *mtd, loff_t ofs) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); if (!chip->bbt) return 0; @@ -512,7 +512,7 @@ static int nand_block_isreserved(struct mtd_info *mtd, loff_t ofs) static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); if (!chip->bbt) return chip->block_bad(mtd, ofs, getchip); @@ -531,7 +531,7 @@ static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, */ static void panic_nand_wait_ready(struct mtd_info *mtd, unsigned long timeo) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); int i; /* Wait for the device to get ready */ @@ -551,7 +551,7 @@ static void panic_nand_wait_ready(struct mtd_info *mtd, unsigned long timeo) */ void nand_wait_ready(struct mtd_info *mtd) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); unsigned long timeo = 400; if (in_interrupt() || oops_in_progress) @@ -582,7 +582,7 @@ EXPORT_SYMBOL_GPL(nand_wait_ready); */ static void nand_wait_status_ready(struct mtd_info *mtd, unsigned long timeo) { - register struct nand_chip *chip = mtd->priv; + register struct nand_chip *chip = mtd_to_nand(mtd); timeo = jiffies + msecs_to_jiffies(timeo); do { @@ -605,7 +605,7 @@ static void nand_wait_status_ready(struct mtd_info *mtd, unsigned long timeo) static void nand_command(struct mtd_info *mtd, unsigned int command, int column, int page_addr) { - register struct nand_chip *chip = mtd->priv; + register struct nand_chip *chip = mtd_to_nand(mtd); int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE; /* Write out the command to the device */ @@ -708,7 +708,7 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, static void nand_command_lp(struct mtd_info *mtd, unsigned int command, int column, int page_addr) { - register struct nand_chip *chip = mtd->priv; + register struct nand_chip *chip = mtd_to_nand(mtd); /* Emulate NAND_CMD_READOOB */ if (command == NAND_CMD_READOOB) { @@ -832,7 +832,7 @@ static void panic_nand_get_device(struct nand_chip *chip, static int nand_get_device(struct mtd_info *mtd, int new_state) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); spinlock_t *lock = &chip->controller->lock; wait_queue_head_t *wq = &chip->controller->wq; DECLARE_WAITQUEUE(wait, current); @@ -952,7 +952,7 @@ static int __nand_unlock(struct mtd_info *mtd, loff_t ofs, { int ret = 0; int status, page; - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); /* Submit address of first page to unlock */ page = ofs >> chip->page_shift; @@ -987,7 +987,7 @@ int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) { int ret = 0; int chipnr; - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); pr_debug("%s: start = 0x%012llx, len = %llu\n", __func__, (unsigned long long)ofs, len); @@ -1050,7 +1050,7 @@ int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) { int ret = 0; int chipnr, status, page; - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); pr_debug("%s: start = 0x%012llx, len = %llu\n", __func__, (unsigned long long)ofs, len); @@ -1655,7 +1655,7 @@ static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob, */ static int nand_setup_read_retry(struct mtd_info *mtd, int retry_mode) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); pr_debug("setting READ RETRY mode %d\n", retry_mode); @@ -1680,7 +1680,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) { int chipnr, page, realpage, col, bytes, aligned, oob_required; - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); int ret = 0; uint32_t readlen = ops->len; uint32_t oobreadlen = ops->ooblen; @@ -2024,7 +2024,7 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) { int page, realpage, chipnr; - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); struct mtd_ecc_stats stats; int readlen = ops->ooblen; int len; @@ -2472,7 +2472,7 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, static uint8_t *nand_fill_oob(struct mtd_info *mtd, uint8_t *oob, size_t len, struct mtd_oob_ops *ops) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); /* * Initialise to all 0xFF, to avoid the possibility of left over OOB @@ -2532,7 +2532,7 @@ static int nand_do_write_ops(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops) { int chipnr, realpage, page, blockmask, column; - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); uint32_t writelen = ops->len; uint32_t oobwritelen = ops->ooblen; @@ -2662,7 +2662,7 @@ err_out: static int panic_nand_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const uint8_t *buf) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); struct mtd_oob_ops ops; int ret; @@ -2722,7 +2722,7 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops) { int chipnr, page, status, len; - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); pr_debug("%s: to = 0x%08x, len = %i\n", __func__, (unsigned int)to, (int)ops->ooblen); @@ -2847,7 +2847,7 @@ out: */ static int single_erase(struct mtd_info *mtd, int page) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); /* Send commands to erase a block */ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); @@ -2879,7 +2879,7 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, int allowbbt) { int page, status, pages_per_block, ret, chipnr; - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); loff_t len; pr_debug("%s: start = 0x%012llx, len = %llu\n", @@ -3094,7 +3094,7 @@ static int nand_suspend(struct mtd_info *mtd) */ static void nand_resume(struct mtd_info *mtd) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); if (chip->state == FL_PM_SUSPENDED) nand_release_device(mtd); @@ -3266,7 +3266,7 @@ ext_out: static int nand_setup_read_retry_micron(struct mtd_info *mtd, int retry_mode) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); uint8_t feature[ONFI_SUBFEATURE_PARAM_LEN] = {retry_mode}; return chip->onfi_set_features(mtd, chip, ONFI_FEATURE_ADDR_READ_RETRY, @@ -3985,7 +3985,7 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips, struct nand_flash_dev *table) { int i, nand_maf_id, nand_dev_id; - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); struct nand_flash_dev *type; int ret; @@ -4056,7 +4056,7 @@ EXPORT_SYMBOL(nand_scan_ident); */ static bool nand_ecc_strength_good(struct mtd_info *mtd) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); struct nand_ecc_ctrl *ecc = &chip->ecc; int corr, ds_corr; @@ -4085,7 +4085,7 @@ static bool nand_ecc_strength_good(struct mtd_info *mtd) int nand_scan_tail(struct mtd_info *mtd) { int i; - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); struct nand_ecc_ctrl *ecc = &chip->ecc; struct nand_buffers *nbuf; @@ -4429,7 +4429,7 @@ EXPORT_SYMBOL(nand_scan); */ void nand_release(struct mtd_info *mtd) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); if (chip->ecc.mode == NAND_ECC_SOFT_BCH) nand_bch_free((struct nand_bch_control *)chip->ecc.priv); diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c index b1d4f813aedc..4b6a7085b442 100644 --- a/drivers/mtd/nand/nand_bbt.c +++ b/drivers/mtd/nand/nand_bbt.c @@ -172,7 +172,7 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num, struct nand_bbt_descr *td, int offs) { int res, ret = 0, i, j, act = 0; - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); size_t retlen, len, totlen; loff_t from; int bits = td->options & NAND_BBT_NRBITS_MSK; @@ -263,7 +263,7 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num, */ static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); int res = 0, i; if (td->options & NAND_BBT_PERCHIP) { @@ -388,7 +388,7 @@ static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td) static void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, struct nand_bbt_descr *md) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); /* Read the primary version, if available */ if (td->options & NAND_BBT_VERSION) { @@ -454,7 +454,7 @@ static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd, static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd, int chip) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); int i, numblocks, numpages; int startblock; loff_t from; @@ -523,7 +523,7 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, */ static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); int i, chips; int startblock, block, dir; int scanlen = mtd->writesize + mtd->oobsize; @@ -618,7 +618,7 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, struct nand_bbt_descr *md, int chipsel) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); struct erase_info einfo; int i, res, chip = 0; int bits, startblock, dir, page, offs, numblocks, sft, sftmsk; @@ -819,7 +819,7 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf, */ static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); return create_bbt(mtd, this->buffers->databuf, bd, -1); } @@ -838,7 +838,7 @@ static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *b static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd) { int i, chips, writeops, create, chipsel, res, res2; - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); struct nand_bbt_descr *td = this->bbt_td; struct nand_bbt_descr *md = this->bbt_md; struct nand_bbt_descr *rd, *rd2; @@ -962,7 +962,7 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc */ static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); int i, j, chips, block, nrblocks, update; uint8_t oldval; @@ -1022,7 +1022,7 @@ static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td) */ static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); u32 pattern_len; u32 bits; u32 table_size; @@ -1074,7 +1074,7 @@ static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd) */ static int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); int len, res; uint8_t *buf; struct nand_bbt_descr *td = this->bbt_td; @@ -1147,7 +1147,7 @@ err: */ static int nand_update_bbt(struct mtd_info *mtd, loff_t offs) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); int len, res = 0; int chip, chipsel; uint8_t *buf; @@ -1281,7 +1281,7 @@ static int nand_create_badblock_pattern(struct nand_chip *this) */ int nand_default_bbt(struct mtd_info *mtd) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); int ret; /* Is a flash based bad block table requested? */ @@ -1317,7 +1317,7 @@ int nand_default_bbt(struct mtd_info *mtd) */ int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); int block; block = (int)(offs >> this->bbt_erase_shift); @@ -1332,7 +1332,7 @@ int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs) */ int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); int block, res; block = (int)(offs >> this->bbt_erase_shift); @@ -1359,7 +1359,7 @@ int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt) */ int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs) { - struct nand_chip *this = mtd->priv; + struct nand_chip *this = mtd_to_nand(mtd); int block, ret = 0; block = (int)(offs >> this->bbt_erase_shift); diff --git a/drivers/mtd/nand/nand_bch.c b/drivers/mtd/nand/nand_bch.c index 3803e0bba23b..e5758d885943 100644 --- a/drivers/mtd/nand/nand_bch.c +++ b/drivers/mtd/nand/nand_bch.c @@ -52,7 +52,7 @@ struct nand_bch_control { int nand_bch_calculate_ecc(struct mtd_info *mtd, const unsigned char *buf, unsigned char *code) { - const struct nand_chip *chip = mtd->priv; + const struct nand_chip *chip = mtd_to_nand(mtd); struct nand_bch_control *nbc = chip->ecc.priv; unsigned int i; @@ -79,7 +79,7 @@ EXPORT_SYMBOL(nand_bch_calculate_ecc); int nand_bch_correct_data(struct mtd_info *mtd, unsigned char *buf, unsigned char *read_ecc, unsigned char *calc_ecc) { - const struct nand_chip *chip = mtd->priv; + const struct nand_chip *chip = mtd_to_nand(mtd); struct nand_bch_control *nbc = chip->ecc.priv; unsigned int *errloc = nbc->errloc; int i, count; diff --git a/drivers/mtd/nand/nand_ecc.c b/drivers/mtd/nand/nand_ecc.c index 97c4c0216c90..e6129851bfd8 100644 --- a/drivers/mtd/nand/nand_ecc.c +++ b/drivers/mtd/nand/nand_ecc.c @@ -424,7 +424,7 @@ int nand_calculate_ecc(struct mtd_info *mtd, const unsigned char *buf, unsigned char *code) { __nand_calculate_ecc(buf, - ((struct nand_chip *)mtd->priv)->ecc.size, code); + mtd_to_nand(mtd)->ecc.size, code); return 0; } @@ -524,7 +524,7 @@ int nand_correct_data(struct mtd_info *mtd, unsigned char *buf, unsigned char *read_ecc, unsigned char *calc_ecc) { return __nand_correct_data(buf, read_ecc, calc_ecc, - ((struct nand_chip *)mtd->priv)->ecc.size); + mtd_to_nand(mtd)->ecc.size); } EXPORT_SYMBOL(nand_correct_data); diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c index b16d70aafd9e..eb2a567f41d9 100644 --- a/drivers/mtd/nand/nandsim.c +++ b/drivers/mtd/nand/nandsim.c @@ -666,7 +666,7 @@ static char *get_partition_name(int i) */ static int init_nandsim(struct mtd_info *mtd) { - struct nand_chip *chip = mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); struct nandsim *ns = chip->priv; int i, ret = 0; uint64_t remains; @@ -1908,7 +1908,7 @@ static void switch_state(struct nandsim *ns) static u_char ns_nand_read_byte(struct mtd_info *mtd) { - struct nandsim *ns = ((struct nand_chip *)mtd->priv)->priv; + struct nandsim *ns = mtd_to_nand(mtd)->priv; u_char outb = 0x00; /* Sanity and correctness checks */ @@ -1969,7 +1969,7 @@ static u_char ns_nand_read_byte(struct mtd_info *mtd) static void ns_nand_write_byte(struct mtd_info *mtd, u_char byte) { - struct nandsim *ns = ((struct nand_chip *)mtd->priv)->priv; + struct nandsim *ns = mtd_to_nand(mtd)->priv; /* Sanity and correctness checks */ if (!ns->lines.ce) { @@ -2123,7 +2123,7 @@ static void ns_nand_write_byte(struct mtd_info *mtd, u_char byte) static void ns_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int bitmask) { - struct nandsim *ns = ((struct nand_chip *)mtd->priv)->priv; + struct nandsim *ns = mtd_to_nand(mtd)->priv; ns->lines.cle = bitmask & NAND_CLE ? 1 : 0; ns->lines.ale = bitmask & NAND_ALE ? 1 : 0; @@ -2141,7 +2141,7 @@ static int ns_device_ready(struct mtd_info *mtd) static uint16_t ns_nand_read_word(struct mtd_info *mtd) { - struct nand_chip *chip = (struct nand_chip *)mtd->priv; + struct nand_chip *chip = mtd_to_nand(mtd); NS_DBG("read_word\n"); @@ -2150,7 +2150,7 @@ static uint16_t ns_nand_read_word(struct mtd_info *mtd) static void ns_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) { - struct nandsim *ns = ((struct nand_chip *)mtd->priv)->priv; + struct nandsim *ns = mtd_to_nand(mtd)->priv; /* Check that chip is expecting data input */ if (!(ns->state & STATE_DATAIN_MASK)) { @@ -2177,7 +2177,7 @@ static void ns_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) static void ns_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) { - struct nandsim *ns = ((struct nand_chip *)mtd->priv)->priv; + struct nandsim *ns = mtd_to_nand(mtd)->priv; /* Sanity and correctness checks */ if (!ns->lines.ce) { @@ -2198,7 +2198,7 @@ static void ns_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) int i; for (i = 0; i < len; i++) - buf[i] = ((struct nand_chip *)mtd->priv)->read_byte(mtd); + buf[i] = mtd_to_nand(mtd)->read_byte(mtd); return; } @@ -2405,7 +2405,7 @@ module_init(ns_init_module); */ static void __exit ns_cleanup_module(void) { - struct nandsim *ns = ((struct nand_chip *)nsmtd->priv)->priv; + struct nandsim *ns = mtd_to_nand(nsmtd)->priv; int i; nandsim_debugfs_remove(ns); -- cgit v1.2.3 From 7194a29a9bf1e5abcda8b181bba771fbe0e95b6c Mon Sep 17 00:00:00 2001 From: Boris BREZILLON Date: Thu, 10 Dec 2015 09:00:37 +0100 Subject: mtd: nand: simplify nand_dt_init() usage nand_dt_init() function requires 3 arguments where it actually needs one (dn and mtd can both be retrieved from chip). Drop these parameters. Testing for dn != NULL inside nand_dt_init() also helps simplifying the caller code. Signed-off-by: Boris Brezillon Signed-off-by: Brian Norris --- drivers/mtd/nand/nand_base.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) (limited to 'drivers/mtd/nand/nand_base.c') diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 5aec1545cd39..ae3fd2a8c2f5 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -3937,11 +3937,17 @@ ident_done: return type; } -static int nand_dt_init(struct mtd_info *mtd, struct nand_chip *chip, - struct device_node *dn) +static int nand_dt_init(struct nand_chip *chip) { + struct device_node *dn = nand_get_flash_node(chip); int ecc_mode, ecc_strength, ecc_step; + if (!dn) + return 0; + + /* MTD can automatically handle DT partitions, etc. */ + mtd_set_of_node(nand_to_mtd(chip), dn); + if (of_get_nand_bus_width(dn) == 16) chip->options |= NAND_BUSWIDTH_16; @@ -3989,14 +3995,9 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips, struct nand_flash_dev *type; int ret; - if (nand_get_flash_node(chip)) { - /* MTD can automatically handle DT partitions, etc. */ - mtd_set_of_node(mtd, nand_get_flash_node(chip)); - - ret = nand_dt_init(mtd, chip, nand_get_flash_node(chip)); - if (ret) - return ret; - } + ret = nand_dt_init(chip); + if (ret) + return ret; /* Set the default functions */ nand_set_defaults(chip, chip->options & NAND_BUSWIDTH_16); -- cgit v1.2.3 From 29574ede097438c560e8115caff9b6b8668730be Mon Sep 17 00:00:00 2001 From: Boris BREZILLON Date: Thu, 10 Dec 2015 09:00:38 +0100 Subject: mtd: nand: kill the chip->flash_node field Now that the nand_chip struct directly embeds an mtd_info struct we can get rid of the ->flash_node field and forward set/get_flash_node requests to the MTD layer. As a side effect, we no longer need the mtd_set_of_node() call done in nand_dt_init(). Signed-off-by: Boris Brezillon Signed-off-by: Brian Norris --- drivers/mtd/nand/nand_base.c | 3 --- include/linux/mtd/nand.h | 7 ++----- 2 files changed, 2 insertions(+), 8 deletions(-) (limited to 'drivers/mtd/nand/nand_base.c') diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index ae3fd2a8c2f5..8bb8ebd62aaa 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -3945,9 +3945,6 @@ static int nand_dt_init(struct nand_chip *chip) if (!dn) return 0; - /* MTD can automatically handle DT partitions, etc. */ - mtd_set_of_node(nand_to_mtd(chip), dn); - if (of_get_nand_bus_width(dn) == 16) chip->options |= NAND_BUSWIDTH_16; diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 9cb7ace6fb1f..2bee2e42ae2f 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -545,7 +545,6 @@ struct nand_buffers { * flash device * @IO_ADDR_W: [BOARDSPECIFIC] address to write the 8 I/O lines of the * flash device. - * @flash_node: [BOARDSPECIFIC] device node describing this instance * @read_byte: [REPLACEABLE] read one byte from the chip * @read_word: [REPLACEABLE] read one word from the chip * @write_byte: [REPLACEABLE] write a single byte to the chip on the @@ -645,8 +644,6 @@ struct nand_chip { void __iomem *IO_ADDR_R; void __iomem *IO_ADDR_W; - struct device_node *flash_node; - uint8_t (*read_byte)(struct mtd_info *mtd); u16 (*read_word)(struct mtd_info *mtd); void (*write_byte)(struct mtd_info *mtd, uint8_t byte); @@ -724,12 +721,12 @@ struct nand_chip { static inline void nand_set_flash_node(struct nand_chip *chip, struct device_node *np) { - chip->flash_node = np; + mtd_set_of_node(&chip->mtd, np); } static inline struct device_node *nand_get_flash_node(struct nand_chip *chip) { - return chip->flash_node; + return mtd_get_of_node(&chip->mtd); } static inline struct nand_chip *mtd_to_nand(struct mtd_info *mtd) -- cgit v1.2.3 From 44991b3d19cd71eabe68019ae7cb91df0c929614 Mon Sep 17 00:00:00 2001 From: Helmut Schaa Date: Wed, 9 Apr 2014 11:13:24 +0200 Subject: mtd: nand: Disable subpage writes for drivers without ecc->hwctl nand_write_subpage_hwecc causes a crash if the driver did not register ecc->hwctl or ecc->calculate. Fix this by disabling subpage writes if ecc->hwctl or ecc->calculate is not provided by the driver. This behavior was introduced in commit 837a6ba4f3b6d23026674e6af6b6849a4634fff9 "mtd: nand: subpage write support for hardware based ECC schemes". This fixes a crash with fsl_elbc_nand and maybe others: Unable to handle kernel paging request for instruction fetch Faulting instruction address: 0x00000000 Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=2 P1020 RDB Modules linked in: ath9k ath9k_common pppoe ppp_async option iptable_nat ath9k_hw ath usb_wwan pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv4 mac80211 ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_quota xt_policy xt_pkttype xt_owner xt_nat xt_multiport xt_mh CPU: 1 PID: 2161 Comm: ubiformat Not tainted 3.10.26 #6 task: efbc2700 ti: c7950000 task.ti: c7950000 NIP: 00000000 LR: c01a495c CTR: 00000000 REGS: c7951cb0 TRAP: 0400 Not tainted (3.10.26) MSR: 00029000 CR: 24002028 XER: 00000000 GPR00: c01a4b6c c7951d60 efbc2700 ef84b000 00000001 00000000 000001ff c7800500 GPR08: 00000000 00000000 efae5e40 c01a4ae4 24002022 10023418 c7951e5c c7800500 GPR16: c017b6a8 00000000 0000003f c053404c 00000000 00000004 00000000 00000003 GPR24: 00000010 00000200 ef84b000 c7800d00 c7800000 c7800500 ef84b1c8 00000000 NIP [00000000] (null) LR [c01a495c] nand_write_subpage_hwecc+0x74/0x174 Call Trace: [c7951d60] [c7951d64] 0xc7951d64 (unreliable) [c7951da0] [c01a4b6c] nand_write_page+0x88/0x198 [c7951dd0] [c01a5f7c] nand_do_write_ops+0x2f4/0x39c [c7951e40] [c01a61e0] nand_write+0x58/0x84 [c7951e80] [c019e29c] mtdchar_write+0x1dc/0x28c [c7951ef0] [c00aba84] vfs_write+0xcc/0x1ac [c7951f10] [c00ac04c] SyS_write+0x4c/0x90 [c7951f40] [c000cd84] ret_from_syscall+0x0/0x3c --- Exception: c01 at 0x48050ed8 LR = 0x100071b8 Instruction dump: XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX ---[ end trace 161d3c65a2a15cb8 ]--- Kernel panic - not syncing: Fatal exception [Brian: editorial note - we've applied a previous fix for the driver in question (fsl_elbc_nand) long ago: commit f034d87def51 ("mtd: eLBC NAND: fix subpage write support") but this still makes sense, and it could solve issues on some other unforseen driver.] Cc: Pekon Gupta Cc: Artem Bityutskiy Cc: David Woodhouse Signed-off-by: Helmut Schaa Signed-off-by: Brian Norris --- drivers/mtd/nand/nand_base.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/mtd/nand/nand_base.c') diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 8bb8ebd62aaa..928081bbdafd 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -4167,7 +4167,7 @@ int nand_scan_tail(struct mtd_info *mtd) ecc->write_oob = nand_write_oob_std; if (!ecc->read_subpage) ecc->read_subpage = nand_read_subpage; - if (!ecc->write_subpage) + if (!ecc->write_subpage && ecc->hwctl && ecc->calculate) ecc->write_subpage = nand_write_subpage_hwecc; case NAND_ECC_HW_SYNDROME: -- cgit v1.2.3 From f7a8e38f07a17be90758559fe66fe7337096053f Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Tue, 5 Jan 2016 10:39:45 -0800 Subject: mtd: nand: assign reasonable default name for NAND drivers Commits such as commit 853f1c58c4b2 ("mtd: nand: omap2: show parent device structure in sysfs") attempt to rely on the core MTD code to set the MTD name based on the parent device. However, nand_base tries to set a different default name according to the flash name (e.g., extracted from the ONFI parameter page), which means NAND drivers will never make use of the MTD defaults. This is not the intention of commit 853f1c58c4b2. This results in problems when trying to use the cmdline partition parser, since the MTD name is different than expected. Let's fix this by providing a default NAND name, where possible. Note that this is not really a great default name in the long run, since this means that if there are multiple MTDs attached to the same controller device, they will have the same name. But that is an existing issue and requires future work on a better controller vs. flash chip abstraction to fix properly. Fixes: 853f1c58c4b2 ("mtd: nand: omap2: show parent device structure in sysfs") Reported-by: Heiko Schocher Signed-off-by: Brian Norris Reviewed-by: Boris Brezillon Tested-by: Heiko Schocher Cc: Heiko Schocher Cc: Frans Klaver Cc: --- drivers/mtd/nand/nand_base.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/mtd/nand/nand_base.c') diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 928081bbdafd..50514f2501bb 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -3996,6 +3996,9 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips, if (ret) return ret; + if (!mtd->name && mtd->dev.parent) + mtd->name = dev_name(mtd->dev.parent); + /* Set the default functions */ nand_set_defaults(chip, chip->options & NAND_BUSWIDTH_16); -- cgit v1.2.3 From 40cbe6eee97b706f27bcc4c6aa1018bbe4f1e577 Mon Sep 17 00:00:00 2001 From: Boris BREZILLON Date: Wed, 30 Dec 2015 20:32:04 +0100 Subject: mtd: nand: use nand_check_erased_ecc_chunk in default ECC read functions The default NAND read functions are relying on the underlying controller driver to correct bitflips, but some of those controllers cannot properly fix bitflips in erased pages. Check for bitflips in erased pages in default core functions if the driver delegated the this check by setting the NAND_ECC_GENERIC_ERASED_CHECK flag. Signed-off-by: Boris Brezillon Tested-by: Franklin S Cooper Jr. Signed-off-by: Brian Norris --- drivers/mtd/nand/nand_base.c | 53 ++++++++++++++++++++++++++++++++++++++------ include/linux/mtd/nand.h | 10 +++++++++ 2 files changed, 56 insertions(+), 7 deletions(-) (limited to 'drivers/mtd/nand/nand_base.c') diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 50514f2501bb..f2c8ff398d6c 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -1426,6 +1426,16 @@ static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, stat = chip->ecc.correct(mtd, p, &chip->buffers->ecccode[i], &chip->buffers->ecccalc[i]); + if (stat == -EBADMSG && + (chip->ecc.options & NAND_ECC_GENERIC_ERASED_CHECK)) { + /* check for empty pages with bitflips */ + stat = nand_check_erased_ecc_chunk(p, chip->ecc.size, + &chip->buffers->ecccode[i], + chip->ecc.bytes, + NULL, 0, + chip->ecc.strength); + } + if (stat < 0) { mtd->ecc_stats.failed++; } else { @@ -1475,6 +1485,15 @@ static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, int stat; stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]); + if (stat == -EBADMSG && + (chip->ecc.options & NAND_ECC_GENERIC_ERASED_CHECK)) { + /* check for empty pages with bitflips */ + stat = nand_check_erased_ecc_chunk(p, eccsize, + &ecc_code[i], eccbytes, + NULL, 0, + chip->ecc.strength); + } + if (stat < 0) { mtd->ecc_stats.failed++; } else { @@ -1527,6 +1546,15 @@ static int nand_read_page_hwecc_oob_first(struct mtd_info *mtd, chip->ecc.calculate(mtd, p, &ecc_calc[i]); stat = chip->ecc.correct(mtd, p, &ecc_code[i], NULL); + if (stat == -EBADMSG && + (chip->ecc.options & NAND_ECC_GENERIC_ERASED_CHECK)) { + /* check for empty pages with bitflips */ + stat = nand_check_erased_ecc_chunk(p, eccsize, + &ecc_code[i], eccbytes, + NULL, 0, + chip->ecc.strength); + } + if (stat < 0) { mtd->ecc_stats.failed++; } else { @@ -1554,6 +1582,7 @@ static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip, int i, eccsize = chip->ecc.size; int eccbytes = chip->ecc.bytes; int eccsteps = chip->ecc.steps; + int eccpadbytes = eccbytes + chip->ecc.prepad + chip->ecc.postpad; uint8_t *p = buf; uint8_t *oob = chip->oob_poi; unsigned int max_bitflips = 0; @@ -1573,19 +1602,29 @@ static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip, chip->read_buf(mtd, oob, eccbytes); stat = chip->ecc.correct(mtd, p, oob, NULL); - if (stat < 0) { - mtd->ecc_stats.failed++; - } else { - mtd->ecc_stats.corrected += stat; - max_bitflips = max_t(unsigned int, max_bitflips, stat); - } - oob += eccbytes; if (chip->ecc.postpad) { chip->read_buf(mtd, oob, chip->ecc.postpad); oob += chip->ecc.postpad; } + + if (stat == -EBADMSG && + (chip->ecc.options & NAND_ECC_GENERIC_ERASED_CHECK)) { + /* check for empty pages with bitflips */ + stat = nand_check_erased_ecc_chunk(p, chip->ecc.size, + oob - eccpadbytes, + eccpadbytes, + NULL, 0, + chip->ecc.strength); + } + + if (stat < 0) { + mtd->ecc_stats.failed++; + } else { + mtd->ecc_stats.corrected += stat; + max_bitflips = max_t(unsigned int, max_bitflips, stat); + } } /* Calculate remaining oob bytes */ diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 518958115182..86487dbe7358 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -129,6 +129,14 @@ typedef enum { /* Enable Hardware ECC before syndrome is read back from flash */ #define NAND_ECC_READSYN 2 +/* + * Enable generic NAND 'page erased' check. This check is only done when + * ecc.correct() returns -EBADMSG. + * Set this flag if your implementation does not fix bitflips in erased + * pages and you want to rely on the default implementation. + */ +#define NAND_ECC_GENERIC_ERASED_CHECK BIT(0) + /* Bit mask for flags passed to do_nand_read_ecc */ #define NAND_GET_DEVICE 0x80 @@ -451,6 +459,7 @@ struct nand_hw_control { * @total: total number of ECC bytes per page * @prepad: padding information for syndrome based ECC generators * @postpad: padding information for syndrome based ECC generators + * @options: ECC specific options (see NAND_ECC_XXX flags defined above) * @layout: ECC layout control struct pointer * @priv: pointer to private ECC control data * @hwctl: function to control hardware ECC generator. Must only @@ -500,6 +509,7 @@ struct nand_ecc_ctrl { int strength; int prepad; int postpad; + unsigned int options; struct nand_ecclayout *layout; void *priv; void (*hwctl)(struct mtd_info *mtd, int mode); -- cgit v1.2.3