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mtd: do not use mtd->read_*_prot_reg directly

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Instead, call 'mtd_read_*_prot_info()' and check for -EOPNOTSUPP.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Artem Bityutskiy 2011-12-29 10:06:32 +02:00 committed by David Woodhouse
parent 87e858a97e
commit b6de3d6cb6
2 changed files with 14 additions and 8 deletions
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18
drivers/mtd/mtdchar.c
View File

@ -366,20 +366,22 @@ static void mtdchar_erase_callback (struct erase_info *instr)
static int otp_select_filemode(struct mtd_file_info *mfi, int mode)
{
struct mtd_info *mtd = mfi->mtd;
size_t retlen;
int ret = 0;
/*
* Make a fake call to mtd_read_fact_prot_reg() to check if OTP
* operations are supported.
*/
if (mtd_read_fact_prot_reg(mtd, -1, -1, &retlen, NULL) == -EOPNOTSUPP)
return -EOPNOTSUPP;
switch (mode) {
case MTD_OTP_FACTORY:
if (!mtd->read_fact_prot_reg)
ret = -EOPNOTSUPP;
else
mfi->mode = MTD_FILE_MODE_OTP_FACTORY;
mfi->mode = MTD_FILE_MODE_OTP_FACTORY;
break;
case MTD_OTP_USER:
if (!mtd->read_fact_prot_reg)
ret = -EOPNOTSUPP;
else
mfi->mode = MTD_FILE_MODE_OTP_USER;
mfi->mode = MTD_FILE_MODE_OTP_USER;
break;
default:
ret = -EINVAL;

4
include/linux/mtd/mtd.h
View File

@ -352,6 +352,8 @@ static inline int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
u_char *buf)
{
*retlen = 0;
if (!mtd->read_fact_prot_reg)
return -EOPNOTSUPP;
return mtd->read_fact_prot_reg(mtd, from, len, retlen, buf);
}
@ -369,6 +371,8 @@ static inline int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from,
u_char *buf)
{
*retlen = 0;
if (!mtd->read_user_prot_reg)
return -EOPNOTSUPP;
return mtd->read_user_prot_reg(mtd, from, len, retlen, buf);
}