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mtd: return error code from mtd_unpoint

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The 'mtd_unpoint()' API function should be able to return an error code because
it may fail if you specify incorrect offset. This patch changes this MTD API
function and amends all the drivers correspondingly.

Also return '-EOPNOTSUPP' from 'mtd_unpoint()' when the '->unpoint()' method is
undefined. We do not really need this currently, but this just makes
sense to be consistent with 'mtd_point()'.

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
2012-02-03 13:20:43 +02:00
committed by David Woodhouse
parent e2414f4c20
commit 5e4e6e3fdf
9 changed files with 33 additions and 20 deletions
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6
include/linux/mtd/mtd.h
View File

@@ -177,7 +177,7 @@ struct mtd_info {
int (*_erase) (struct mtd_info *mtd, struct erase_info *instr);
int (*_point) (struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys);
void (*_unpoint) (struct mtd_info *mtd, loff_t from, size_t len);
int (*_unpoint) (struct mtd_info *mtd, loff_t from, size_t len);
unsigned long (*_get_unmapped_area) (struct mtd_info *mtd,
unsigned long len,
unsigned long offset,
@@ -265,8 +265,10 @@ static inline int mtd_point(struct mtd_info *mtd, loff_t from, size_t len,
}
/* We probably shouldn't allow XIP if the unpoint isn't a NULL */
static inline void mtd_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
static inline int mtd_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
if (!mtd->_point)
return -EOPNOTSUPP;
return mtd->_unpoint(mtd, from, len);
}

1
include/linux/mtd/pmc551.h
View File

@@ -34,7 +34,6 @@ struct mypriv {
* Function Prototypes
*/
static int pmc551_erase(struct mtd_info *, struct erase_info *);
static void pmc551_unpoint(struct mtd_info *, loff_t, size_t);
static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys);
static int pmc551_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *);