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Date: Fri, 20 Jul 2018 17:15:26 +0200
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Wenyou Yang <wenyou.yang@...rochip.com>,
Josh Wu <rainyfeeling@...look.com>,
Tudor Ambarus <Tudor.Ambarus@...rochip.com>,
Boris Brezillon <boris.brezillon@...tlin.com>,
Miquel Raynal <miquel.raynal@...tlin.com>,
Richard Weinberger <richard@....at>,
David Woodhouse <dwmw2@...radead.org>,
Brian Norris <computersforpeace@...il.com>,
Marek Vasut <marek.vasut@...il.com>,
Nicolas Ferre <nicolas.ferre@...rochip.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Kamal Dasu <kdasu.kdev@...il.com>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
Han Xu <han.xu@....com>,
Harvey Hunt <harveyhuntnexus@...il.com>,
Vladimir Zapolskiy <vz@...ia.com>,
Sylvain Lemieux <slemieux.tyco@...il.com>,
Xiaolei Li <xiaolei.li@...iatek.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Maxime Ripard <maxime.ripard@...tlin.com>,
Chen-Yu Tsai <wens@...e.org>,
Marc Gonzalez <marc.w.gonzalez@...e.fr>,
Mans Rullgard <mans@...sr.com>, Stefan Agner <stefan@...er.ch>
Cc: linux-mtd@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
bcm-kernel-feedback-list@...adcom.com,
linux-mediatek@...ts.infradead.org
Subject: [PATCH v4 34/35] mtd: rawnand: allocate model parameter dynamically
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 <miquel.raynal@...tlin.com>
---
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);
--
2.14.1
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