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mtd: concat: implement _is_locked mtd operation

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Add an implementation of the _is_locked operation for concatenated mtd
devices. This doesn't handle getting the lock status of a range that
spans chips, which is consistent with cfi_ppb_is_locked and
cfi_intelext_is_locked which only look at the first block in the range.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Chris Packham 2019-05-23 11:19:48 +12:00 committed by Richard Weinberger
parent 6a08a2f127
commit 3bb4bba792
1 changed files with 23 additions and 0 deletions
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23
drivers/mtd/mtdconcat.c
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@ -485,6 +485,28 @@ static int concat_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
return concat_xxlock(mtd, ofs, len, false); return concat_xxlock(mtd, ofs, len, false);
} }
static int concat_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
struct mtd_concat *concat = CONCAT(mtd);
int i, err = -EINVAL;
for (i = 0; i < concat->num_subdev; i++) {
struct mtd_info *subdev = concat->subdev[i];
if (ofs >= subdev->size) {
ofs -= subdev->size;
continue;
}
if (ofs + len > subdev->size)
break;
return mtd_is_locked(subdev, ofs, len);
}
return err;
}
static void concat_sync(struct mtd_info *mtd) static void concat_sync(struct mtd_info *mtd)
{ {
struct mtd_concat *concat = CONCAT(mtd); struct mtd_concat *concat = CONCAT(mtd);
@ -684,6 +706,7 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c
concat->mtd._sync = concat_sync; concat->mtd._sync = concat_sync;
concat->mtd._lock = concat_lock; concat->mtd._lock = concat_lock;
concat->mtd._unlock = concat_unlock; concat->mtd._unlock = concat_unlock;
concat->mtd._is_locked = concat_is_locked;
concat->mtd._suspend = concat_suspend; concat->mtd._suspend = concat_suspend;
concat->mtd._resume = concat_resume; concat->mtd._resume = concat_resume;