mtd: add an ioctl to query the lock status of a flash sector
This patchs adds a way for user space programs to find out whether a
flash sector is locked. An optional driver method in the mtd_info struct
provides the information.
Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index b8043a9..4c539de 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -264,6 +264,14 @@
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 @@
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)