mtd: add an ioctl to query the lock status of a flash sector

[firefly-linux-kernel-4.4.55.git] / drivers / mtd / mtdpart.c

diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index b8043a9ba32d43329080b3664a8ae8678f7c7693..4c539ded0b7093c21ba04b9e5f7e83ae4530465d 100644 (file)
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -264,6 +264,14 @@ static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
        return part->master->unlock(part->master, ofs + part->offset, len);
 }
 
+static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+       struct mtd_part *part = PART(mtd);
+       if ((len + ofs) > mtd->size)
+               return -EINVAL;
+       return part->master->is_locked(part->master, ofs + part->offset, len);
+}
+
 static void part_sync(struct mtd_info *mtd)
 {
        struct mtd_part *part = PART(mtd);
@@ -402,6 +410,8 @@ static struct mtd_part *add_one_partition(struct mtd_info *master,
                slave->mtd.lock = part_lock;
        if (master->unlock)
                slave->mtd.unlock = part_unlock;
+       if (master->is_locked)
+               slave->mtd.is_locked = part_is_locked;
        if (master->block_isbad)
                slave->mtd.block_isbad = part_block_isbad;
        if (master->block_markbad)