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mtd: Add a retlen parameter to _get_{fact,user}_prot_info

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Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Cc: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Christian Riesch 2014-01-28 09:29:44 +01:00 committed by Brian Norris
parent 41bf1a24c1
commit 4b78fc42f3
7 changed files with 57 additions and 64 deletions
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31
drivers/mtd/chips/cfi_cmdset_0001.c
View File

@ -68,10 +68,10 @@ static int cfi_intelext_read_fact_prot_reg (struct mtd_info *, loff_t, size_t, s
static int cfi_intelext_read_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int cfi_intelext_write_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int cfi_intelext_lock_user_prot_reg (struct mtd_info *, loff_t, size_t);
static int cfi_intelext_get_fact_prot_info (struct mtd_info *,
struct otp_info *, size_t);
static int cfi_intelext_get_user_prot_info (struct mtd_info *,
struct otp_info *, size_t);
static int cfi_intelext_get_fact_prot_info(struct mtd_info *, size_t,
size_t *, struct otp_info *);
static int cfi_intelext_get_user_prot_info(struct mtd_info *, size_t,
size_t *, struct otp_info *);
#endif
static int cfi_intelext_suspend (struct mtd_info *);
static void cfi_intelext_resume (struct mtd_info *);
@ -2394,24 +2394,19 @@ static int cfi_intelext_lock_user_prot_reg(struct mtd_info *mtd,
NULL, do_otp_lock, 1);
}
static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd,
struct otp_info *buf, size_t len)
{
size_t retlen;
int ret;
static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd, size_t len,
size_t *retlen, struct otp_info *buf)
ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 0);
return ret ? : retlen;
{
return cfi_intelext_otp_walk(mtd, 0, len, retlen, (u_char *)buf,
NULL, 0);
}
static int cfi_intelext_get_user_prot_info(struct mtd_info *mtd,
struct otp_info *buf, size_t len)
static int cfi_intelext_get_user_prot_info(struct mtd_info *mtd, size_t len,
size_t *retlen, struct otp_info *buf)
{
size_t retlen;
int ret;
ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 1);
return ret ? : retlen;
return cfi_intelext_otp_walk(mtd, 0, len, retlen, (u_char *)buf,
NULL, 1);
}
#endif

7
drivers/mtd/devices/mtd_dataflash.c
View File

@ -439,8 +439,8 @@ static int dataflash_write(struct mtd_info *mtd, loff_t to, size_t len,
#ifdef CONFIG_MTD_DATAFLASH_OTP
static int dataflash_get_otp_info(struct mtd_info *mtd,
struct otp_info *info, size_t len)
static int dataflash_get_otp_info(struct mtd_info *mtd, size_t len,
size_t *retlen, struct otp_info *info)
{
/* Report both blocks as identical: bytes 0..64, locked.
* Unless the user block changed from all-ones, we can't
@ -449,7 +449,8 @@ static int dataflash_get_otp_info(struct mtd_info *mtd,
info->start = 0;
info->length = 64;
info->locked = 1;
return sizeof(*info);
*retlen = sizeof(*info);
return 0;
}
static ssize_t otp_read(struct spi_device *spi, unsigned base,

11
drivers/mtd/mtdchar.c
View File

@ -889,25 +889,26 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg)
case OTPGETREGIONINFO:
{
struct otp_info *buf = kmalloc(4096, GFP_KERNEL);
size_t retlen;
if (!buf)
return -ENOMEM;
switch (mfi->mode) {
case MTD_FILE_MODE_OTP_FACTORY:
ret = mtd_get_fact_prot_info(mtd, buf, 4096);
ret = mtd_get_fact_prot_info(mtd, 4096, &retlen, buf);
break;
case MTD_FILE_MODE_OTP_USER:
ret = mtd_get_user_prot_info(mtd, buf, 4096);
ret = mtd_get_user_prot_info(mtd, 4096, &retlen, buf);
break;
default:
ret = -EINVAL;
break;
}
if (ret >= 0) {
if (!ret) {
if (cmd == OTPGETREGIONCOUNT) {
int nbr = ret / sizeof(struct otp_info);
int nbr = retlen / sizeof(struct otp_info);
ret = copy_to_user(argp, &nbr, sizeof(int));
} else
ret = copy_to_user(argp, buf, ret);
ret = copy_to_user(argp, buf, retlen);
if (ret)
ret = -EFAULT;
}

12
drivers/mtd/mtdcore.c
View File

@ -883,14 +883,14 @@ EXPORT_SYMBOL_GPL(mtd_read_oob);
* devices. The user data is one time programmable but the factory data is read
* only.
*/
int mtd_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf,
size_t len)
int mtd_get_fact_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen,
struct otp_info *buf)
{
if (!mtd->_get_fact_prot_info)
return -EOPNOTSUPP;
if (!len)
return 0;
return mtd->_get_fact_prot_info(mtd, buf, len);
return mtd->_get_fact_prot_info(mtd, len, retlen, buf);
}
EXPORT_SYMBOL_GPL(mtd_get_fact_prot_info);
@ -906,14 +906,14 @@ int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, size_t len,
}
EXPORT_SYMBOL_GPL(mtd_read_fact_prot_reg);
int mtd_get_user_prot_info(struct mtd_info *mtd, struct otp_info *buf,
size_t len)
int mtd_get_user_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen,
struct otp_info *buf)
{
if (!mtd->_get_user_prot_info)
return -EOPNOTSUPP;
if (!len)
return 0;
return mtd->_get_user_prot_info(mtd, buf, len);
return mtd->_get_user_prot_info(mtd, len, retlen, buf);
}
EXPORT_SYMBOL_GPL(mtd_get_user_prot_info);

14
drivers/mtd/mtdpart.c
View File

@ -150,11 +150,12 @@ static int part_read_user_prot_reg(struct mtd_info *mtd, loff_t from,
retlen, buf);
}
static int part_get_user_prot_info(struct mtd_info *mtd,
struct otp_info *buf, size_t len)
static int part_get_user_prot_info(struct mtd_info *mtd, size_t len,
size_t *retlen, struct otp_info *buf)
{
struct mtd_part *part = PART(mtd);
return part->master->_get_user_prot_info(part->master, buf, len);
return part->master->_get_user_prot_info(part->master, len, retlen,
buf);
}
static int part_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
@ -165,11 +166,12 @@ static int part_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
retlen, buf);
}
static int part_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf,
size_t len)
static int part_get_fact_prot_info(struct mtd_info *mtd, size_t len,
size_t *retlen, struct otp_info *buf)
{
struct mtd_part *part = PART(mtd);
return part->master->_get_fact_prot_info(part->master, buf, len);
return part->master->_get_fact_prot_info(part->master, len, retlen,
buf);
}
static int part_write(struct mtd_info *mtd, loff_t to, size_t len,

30
drivers/mtd/onenand/onenand_base.c
View File

@ -3237,20 +3237,17 @@ static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len,
/**
* onenand_get_fact_prot_info - [MTD Interface] Read factory OTP info
* @param mtd MTD device structure
* @param buf the databuffer to put/get data
* @param len number of bytes to read
* @param retlen pointer to variable to store the number of read bytes
* @param buf the databuffer to put/get data
*
* Read factory OTP info.
*/
static int onenand_get_fact_prot_info(struct mtd_info *mtd,
struct otp_info *buf, size_t len)
static int onenand_get_fact_prot_info(struct mtd_info *mtd, size_t len,
size_t *retlen, struct otp_info *buf)
{
size_t retlen;
int ret;
ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_FACTORY);
return ret ? : retlen;
return onenand_otp_walk(mtd, 0, len, retlen, (u_char *) buf, NULL,
MTD_OTP_FACTORY);
}
/**
@ -3272,20 +3269,17 @@ static int onenand_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
/**
* onenand_get_user_prot_info - [MTD Interface] Read user OTP info
* @param mtd MTD device structure
* @param buf the databuffer to put/get data
* @param retlen pointer to variable to store the number of read bytes
* @param len number of bytes to read
* @param buf the databuffer to put/get data
*
* Read user OTP info.
*/
static int onenand_get_user_prot_info(struct mtd_info *mtd,
struct otp_info *buf, size_t len)
static int onenand_get_user_prot_info(struct mtd_info *mtd, size_t len,
size_t *retlen, struct otp_info *buf)
{
size_t retlen;
int ret;
ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_USER);
return ret ? : retlen;
return onenand_otp_walk(mtd, 0, len, retlen, (u_char *) buf, NULL,
MTD_OTP_USER);
}
/**

16
include/linux/mtd/mtd.h
View File

@ -204,12 +204,12 @@ struct mtd_info {
struct mtd_oob_ops *ops);
int (*_write_oob) (struct mtd_info *mtd, loff_t to,
struct mtd_oob_ops *ops);
int (*_get_fact_prot_info) (struct mtd_info *mtd, struct otp_info *buf,
size_t len);
int (*_get_fact_prot_info) (struct mtd_info *mtd, size_t len,
size_t *retlen, struct otp_info *buf);
int (*_read_fact_prot_reg) (struct mtd_info *mtd, loff_t from,
size_t len, size_t *retlen, u_char *buf);
int (*_get_user_prot_info) (struct mtd_info *mtd, struct otp_info *buf,
size_t len);
int (*_get_user_prot_info) (struct mtd_info *mtd, size_t len,
size_t *retlen, struct otp_info *buf);
int (*_read_user_prot_reg) (struct mtd_info *mtd, loff_t from,
size_t len, size_t *retlen, u_char *buf);
int (*_write_user_prot_reg) (struct mtd_info *mtd, loff_t to,
@ -278,12 +278,12 @@ static inline int mtd_write_oob(struct mtd_info *mtd, loff_t to,
return mtd->_write_oob(mtd, to, ops);
}
int mtd_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf,
size_t len);
int mtd_get_fact_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen,
struct otp_info *buf);
int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf);
int mtd_get_user_prot_info(struct mtd_info *mtd, struct otp_info *buf,
size_t len);
int mtd_get_user_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen,
struct otp_info *buf);
int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf);
int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to, size_t len,