On Fri, 20 Jul 2018 17:15:26 +0200 Miquel Raynal <[email protected]> wrote:
> Thanks to the migration of all drivers to use nand_scan() and the > related nand_controller_ops, we can now allocate data during the > detection phase. Let's do it first for the NAND model parameter which > is allocated in nand_detect(). > > Signed-off-by: Miquel Raynal <[email protected]> Reviewed-by: Boris Brezillon <[email protected]> > --- > drivers/mtd/nand/raw/nand_base.c | 52 > +++++++++++++++++++++++++++++++--------- > include/linux/mtd/rawnand.h | 2 +- > 2 files changed, 42 insertions(+), 12 deletions(-) > > diff --git a/drivers/mtd/nand/raw/nand_base.c > b/drivers/mtd/nand/raw/nand_base.c > index da99232702a4..8645f655e5b0 100644 > --- a/drivers/mtd/nand/raw/nand_base.c > +++ b/drivers/mtd/nand/raw/nand_base.c > @@ -5225,8 +5225,11 @@ static int nand_flash_detect_onfi(struct nand_chip > *chip) > > sanitize_string(p->manufacturer, sizeof(p->manufacturer)); > sanitize_string(p->model, sizeof(p->model)); > - strncpy(chip->parameters.model, p->model, > - sizeof(chip->parameters.model) - 1); > + chip->parameters.model = kstrdup(p->model, GFP_KERNEL); > + if (!chip->parameters.model) { > + ret = -ENOMEM; > + goto free_onfi_param_page; > + } > > mtd->writesize = le32_to_cpu(p->byte_per_page); > > @@ -5356,8 +5359,11 @@ static int nand_flash_detect_jedec(struct nand_chip > *chip) > > sanitize_string(p->manufacturer, sizeof(p->manufacturer)); > sanitize_string(p->model, sizeof(p->model)); > - strncpy(chip->parameters.model, p->model, > - sizeof(chip->parameters.model) - 1); > + chip->parameters.model = kstrdup(p->model, GFP_KERNEL); > + if (!chip->parameters.model) { > + ret = -ENOMEM; > + goto free_jedec_param_page; > + } > > mtd->writesize = le32_to_cpu(p->byte_per_page); > > @@ -5546,8 +5552,9 @@ static bool find_full_id_nand(struct nand_chip *chip, > chip->onfi_timing_mode_default = > type->onfi_timing_mode_default; > > - strncpy(chip->parameters.model, type->name, > - sizeof(chip->parameters.model) - 1); > + chip->parameters.model = kstrdup(type->name, GFP_KERNEL); > + if (!chip->parameters.model) > + return false; > > return true; > } > @@ -5706,8 +5713,9 @@ static int nand_detect(struct nand_chip *chip, struct > nand_flash_dev *type) > if (!type->name) > return -ENODEV; > > - strncpy(chip->parameters.model, type->name, > - sizeof(chip->parameters.model) - 1); > + chip->parameters.model = kstrdup(type->name, GFP_KERNEL); > + if (!chip->parameters.model) > + return -ENOMEM; > > chip->chipsize = (uint64_t)type->chipsize << 20; > > @@ -5737,7 +5745,9 @@ static int nand_detect(struct nand_chip *chip, struct > nand_flash_dev *type) > mtd->name); > pr_warn("bus width %d instead of %d bits\n", busw ? 16 : 8, > (chip->options & NAND_BUSWIDTH_16) ? 16 : 8); > - return -EINVAL; > + ret = -EINVAL; > + > + goto free_detect_allocation; > } > > nand_decode_bbm_options(chip); > @@ -5774,6 +5784,11 @@ static int nand_detect(struct nand_chip *chip, struct > nand_flash_dev *type) > (int)(chip->chipsize >> 20), nand_is_slc(chip) ? "SLC" : "MLC", > mtd->erasesize >> 10, mtd->writesize, mtd->oobsize); > return 0; > + > +free_detect_allocation: > + kfree(chip->parameters.model); > + > + return ret; > } > > static const char * const nand_ecc_modes[] = { > @@ -6021,6 +6036,11 @@ static int nand_scan_ident(struct mtd_info *mtd, int > maxchips, > return 0; > } > > +static void nand_scan_ident_cleanup(struct nand_chip *chip) > +{ > + kfree(chip->parameters.model); > +} > + > static int nand_set_ecc_soft_ops(struct mtd_info *mtd) > { > struct nand_chip *chip = mtd_to_nand(mtd); > @@ -6764,11 +6784,18 @@ int nand_scan_with_ids(struct mtd_info *mtd, int > maxchips, > > ret = nand_attach(chip); > if (ret) > - return ret; > + goto cleanup_ident; > > ret = nand_scan_tail(mtd); > if (ret) > - nand_detach(chip); > + goto detach_chip; > + > + return 0; > + > +detach_chip: > + nand_detach(chip); > +cleanup_ident: > + nand_scan_ident_cleanup(chip); > > return ret; > } > @@ -6800,6 +6827,9 @@ void nand_cleanup(struct nand_chip *chip) > > /* Free controller specific allocations after chip identification */ > nand_detach(chip); > + > + /* Free identification phase allocations */ > + nand_scan_ident_cleanup(chip); > } > > EXPORT_SYMBOL_GPL(nand_cleanup); > diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h > index a928771a7ae4..5723d940a47d 100644 > --- a/include/linux/mtd/rawnand.h > +++ b/include/linux/mtd/rawnand.h > @@ -482,7 +482,7 @@ struct onfi_params { > */ > struct nand_parameters { > /* Generic parameters */ > - char model[100]; > + const char *model; > bool supports_set_get_features; > DECLARE_BITMAP(set_feature_list, ONFI_FEATURE_NUMBER); > DECLARE_BITMAP(get_feature_list, ONFI_FEATURE_NUMBER);
