Upstream linux commit 4722c0e958e636.
The returned "type" is never used in nand_scan_ident() and spl code
Make nand_get_flash_type() simply return an integer value in order to avoid unnecessary ERR_PTR/PTR_ERR dance.
Signed-off-by: Michael Trimarchi michael@amarulasolutions.com --- drivers/mtd/nand/raw/mt7621_nand.c | 10 +++++----- drivers/mtd/nand/raw/mxs_nand_spl.c | 8 ++++---- drivers/mtd/nand/raw/nand_base.c | 28 +++++++++++++--------------- include/linux/mtd/rawnand.h | 5 ++--- 4 files changed, 24 insertions(+), 27 deletions(-)
diff --git a/drivers/mtd/nand/raw/mt7621_nand.c b/drivers/mtd/nand/raw/mt7621_nand.c index 9763ae6dc5..a4a0bce35d 100644 --- a/drivers/mtd/nand/raw/mt7621_nand.c +++ b/drivers/mtd/nand/raw/mt7621_nand.c @@ -1184,13 +1184,13 @@ int mt7621_nfc_spl_post_init(struct mt7621_nfc *nfc) { struct nand_chip *nand = &nfc->nand; int nand_maf_id, nand_dev_id; - struct nand_flash_dev *type; + int ret;
- type = nand_get_flash_type(nand, &nand_maf_id, - &nand_dev_id, NULL); + ret = nand_get_flash_type(nand, &nand_maf_id, + &nand_dev_id, NULL);
- if (IS_ERR(type)) - return PTR_ERR(type); + if (ret) + return ret;
nand->numchips = 1; nand->mtd.size = nand->chipsize; diff --git a/drivers/mtd/nand/raw/mxs_nand_spl.c b/drivers/mtd/nand/raw/mxs_nand_spl.c index 3daacbb330..773d375fc2 100644 --- a/drivers/mtd/nand/raw/mxs_nand_spl.c +++ b/drivers/mtd/nand/raw/mxs_nand_spl.c @@ -81,13 +81,13 @@ static int mxs_flash_full_ident(struct mtd_info *mtd) { int nand_maf_id, nand_dev_id; struct nand_chip *chip = mtd_to_nand(mtd); - struct nand_flash_dev *type; + int ret;
- type = nand_get_flash_type(mtd, chip, &nand_maf_id, &nand_dev_id, NULL); + ret = nand_get_flash_type(mtd, chip, &nand_maf_id, &nand_dev_id, NULL);
- if (IS_ERR(type)) { + if (ret) { chip->select_chip(mtd, -1); - return PTR_ERR(type); + return ret; }
return 0; diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index 9d8ccfda53..b4fa618dc4 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -4276,9 +4276,8 @@ static const struct nand_manufacturer *nand_get_manufacturer_desc(u8 id) /* * Get the flash and manufacturer id and lookup if the type is supported. */ -struct nand_flash_dev *nand_get_flash_type(struct nand_chip *chip, int *maf_id, - int *dev_id, - struct nand_flash_dev *type) +int nand_get_flash_type(struct nand_chip *chip, int *maf_id, + int *dev_id, struct nand_flash_dev *type) { struct mtd_info *mtd = &chip->mtd; const struct nand_manufacturer *manufacturer_desc; @@ -4291,7 +4290,7 @@ struct nand_flash_dev *nand_get_flash_type(struct nand_chip *chip, int *maf_id, */ ret = nand_reset(chip, 0); if (ret) - return ERR_PTR(ret); + return ret;
/* Select the device */ chip->select_chip(mtd, 0); @@ -4299,7 +4298,7 @@ struct nand_flash_dev *nand_get_flash_type(struct nand_chip *chip, int *maf_id, /* Send the command for reading device ID */ ret = nand_readid_op(chip, 0, id_data, 2); if (ret) - return ERR_PTR(ret); + return ret;
/* Read manufacturer and device IDs */ *maf_id = id_data[0]; @@ -4315,12 +4314,12 @@ struct nand_flash_dev *nand_get_flash_type(struct nand_chip *chip, int *maf_id, /* Read entire ID string */ ret = nand_readid_op(chip, 0, id_data, 8); if (ret) - return ERR_PTR(ret); + return ret;
if (id_data[0] != *maf_id || id_data[1] != *dev_id) { pr_info("second ID read did not match %02x,%02x against %02x,%02x\n", *maf_id, *dev_id, id_data[0], id_data[1]); - return ERR_PTR(-ENODEV); + return -ENODEV; }
chip->id.len = nand_id_len(id_data, ARRAY_SIZE(chip->id.data)); @@ -4368,7 +4367,7 @@ struct nand_flash_dev *nand_get_flash_type(struct nand_chip *chip, int *maf_id, }
if (!type->name) - return ERR_PTR(-ENODEV); + return -ENODEV;
if (!mtd->name) mtd->name = type->name; @@ -4401,7 +4400,7 @@ ident_done: pr_warn("bus width %d instead %d bit\n", (chip->options & NAND_BUSWIDTH_16) ? 16 : 8, busw ? 16 : 8); - return ERR_PTR(-EINVAL); + return -EINVAL; }
nand_decode_bbm_options(mtd, chip); @@ -4432,7 +4431,7 @@ ident_done:
ret = nand_manufacturer_init(chip); if (ret) - return ERR_PTR(ret); + return ret;
pr_info("device found, Manufacturer ID: 0x%02x, Chip ID: 0x%02x\n", *maf_id, *dev_id); @@ -4460,7 +4459,7 @@ ident_done: pr_info("%d MiB, %s, erase size: %d KiB, page size: %d, OOB size: %d\n", (int)(chip->chipsize >> 20), nand_is_slc(chip) ? "SLC" : "MLC", mtd->erasesize >> 10, mtd->writesize, mtd->oobsize); - return type; + return 0; } EXPORT_SYMBOL(nand_get_flash_type);
@@ -4547,7 +4546,6 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips, { int i, nand_maf_id, nand_dev_id; struct nand_chip *chip = mtd_to_nand(mtd); - struct nand_flash_dev *type; int ret;
if (ofnode_valid(chip->flash_node)) { @@ -4560,14 +4558,14 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips, nand_set_defaults(chip, chip->options & NAND_BUSWIDTH_16);
/* Read the flash type */ - type = nand_get_flash_type(chip, &nand_maf_id, + ret = nand_get_flash_type(chip, &nand_maf_id, &nand_dev_id, table);
- if (IS_ERR(type)) { + if (ret) { if (!(chip->options & NAND_SCAN_SILENT_NODEV)) pr_warn("No NAND device found\n"); chip->select_chip(mtd, -1); - return PTR_ERR(type); + return ret; }
/* Initialize the ->data_interface field. */ diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index 8dc2d81dba..8178f36b49 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -29,9 +29,8 @@ struct nand_flash_dev; struct device_node;
/* Get the flash and manufacturer id and lookup if the type is supported. */ -struct nand_flash_dev *nand_get_flash_type(struct nand_chip *chip, - int *maf_id, int *dev_id, - struct nand_flash_dev *type); +int nand_get_flash_type(struct nand_chip *chip, int *maf_id, int *dev_id, + struct nand_flash_dev *type);
/* Scan and identify a NAND device */ int nand_scan(struct mtd_info *mtd, int max_chips);