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mtd: nand: remove hard-coded NAND ids length 

This commit removes hard-coded '8' used for looping into
struct nand_chip.id.data array.

NAND_MAX_ID_LEN has been introduced by Artem Bityutskiy in
53552d22bf for defining ids length in nand_flash_ids[] list.

This commit unifies ids length in nand base driver.

Signed-off-by: Jean-Louis Thekekara <jeanlouis.thekekara@parrot.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Jean-Louis Thekekara 2017-06-29 19:08:30 +02:00 committed by Boris Brezillon
parent f84674b82a
commit 5158bd5597
2 changed files with 7 additions and 7 deletions
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4
drivers/mtd/nand/nand_base.c
View File

@ -3886,7 +3886,7 @@ static int nand_detect(struct nand_chip *chip, struct nand_flash_dev *type)
chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
/* Read entire ID string */
for (i = 0; i < 8; i++)
for (i = 0; i < ARRAY_SIZE(chip->id.data); i++)
id_data[i] = chip->read_byte(mtd);
if (id_data[0] != maf_id || id_data[1] != dev_id) {
@ -3895,7 +3895,7 @@ static int nand_detect(struct nand_chip *chip, struct nand_flash_dev *type)
return -ENODEV;
}
chip->id.len = nand_id_len(id_data, 8);
chip->id.len = nand_id_len(id_data, ARRAY_SIZE(chip->id.data));
/* Try to identify manufacturer */
manufacturer = nand_get_manufacturer(maf_id);

10
include/linux/mtd/nand.h
View File

@ -439,14 +439,16 @@ struct nand_jedec_params {
__le16 crc;
} __packed;
/* The maximum expected count of bytes in the NAND ID sequence */
#define NAND_MAX_ID_LEN 8
/**
* struct nand_id - NAND id structure
* @data: buffer containing the id bytes. Currently 8 bytes large, but can
* be extended if required.
* @data: buffer containing the id bytes.
* @len: ID length.
*/
struct nand_id {
u8 data[8];
u8 data[NAND_MAX_ID_LEN];
int len;
};
@ -1018,8 +1020,6 @@ static inline void *nand_get_manufacturer_data(struct nand_chip *chip)
#define NAND_MFR_ATO 0x9b
#define NAND_MFR_WINBOND 0xef
/* The maximum expected count of bytes in the NAND ID sequence */
#define NAND_MAX_ID_LEN 8
/*
* A helper for defining older NAND chips where the second ID byte fully