diff options
| -rw-r--r-- | drivers/mtd/mtdconcat.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c index 7e075621bbf..4567bc37378 100644 --- a/drivers/mtd/mtdconcat.c +++ b/drivers/mtd/mtdconcat.c @@ -540,10 +540,12 @@ static int concat_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) else size = len; - err = subdev->lock(subdev, ofs, size); - - if (err) - break; + if (subdev->lock) { + err = subdev->lock(subdev, ofs, size); + if (err) + break; + } else + err = -EOPNOTSUPP; len -= size; if (len == 0) @@ -578,10 +580,12 @@ static int concat_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) else size = len; - err = subdev->unlock(subdev, ofs, size); - - if (err) - break; + if (subdev->unlock) { + err = subdev->unlock(subdev, ofs, size); + if (err) + break; + } else + err = -EOPNOTSUPP; len -= size; if (len == 0) |