UBI: introduce volume refcounting
Add ref_count field to UBI volumes and remove weired "vol->removed"
field. This way things are better understandable and we do not have
to do whold show_attr operation under spinlock.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 2ff3492..84f7dc9 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -301,6 +301,8 @@
{
int err, pnum, vol_id = vol->vol_id;
+ ubi_assert(vol->ref_count > 0);
+
if (ubi->ro_mode)
return -EROFS;
@@ -349,6 +351,8 @@
struct ubi_vid_hdr *vid_hdr;
uint32_t uninitialized_var(crc);
+ ubi_assert(vol->ref_count > 0);
+
err = leb_read_lock(ubi, vol_id, lnum);
if (err)
return err;
@@ -572,6 +576,8 @@
int err, pnum, tries = 0, vol_id = vol->vol_id;
struct ubi_vid_hdr *vid_hdr;
+ ubi_assert(vol->ref_count > 0);
+
if (ubi->ro_mode)
return -EROFS;
@@ -705,6 +711,8 @@
struct ubi_vid_hdr *vid_hdr;
uint32_t crc;
+ ubi_assert(vol->ref_count > 0);
+
if (ubi->ro_mode)
return -EROFS;
@@ -819,6 +827,8 @@
struct ubi_vid_hdr *vid_hdr;
uint32_t crc;
+ ubi_assert(vol->ref_count > 0);
+
if (ubi->ro_mode)
return -EROFS;