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Diffstat (limited to 'drivers/mtd/ubi/ubi.h')
-rw-r--r--drivers/mtd/ubi/ubi.h10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index f782d5aa849..ea9a6990a4d 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -275,13 +275,13 @@ struct ubi_wl_entry;
* @wl_lock: protects the @used, @free, @prot, @lookuptbl, @abs_ec, @move_from,
* @move_to, @move_to_put @erase_pending, @wl_scheduled, and @works
* fields
+ * @move_mutex: serializes eraseblock moves
* @wl_scheduled: non-zero if the wear-leveling was scheduled
* @lookuptbl: a table to quickly find a &struct ubi_wl_entry object for any
* physical eraseblock
* @abs_ec: absolute erase counter
* @move_from: physical eraseblock from where the data is being moved
* @move_to: physical eraseblock where the data is being moved to
- * @move_from_put: if the "from" PEB was put
* @move_to_put: if the "to" PEB was put
* @works: list of pending works
* @works_count: count of pending works
@@ -354,12 +354,12 @@ struct ubi_device {
struct rb_root aec;
} prot;
spinlock_t wl_lock;
+ struct mutex move_mutex;
int wl_scheduled;
struct ubi_wl_entry **lookuptbl;
unsigned long long abs_ec;
struct ubi_wl_entry *move_from;
struct ubi_wl_entry *move_to;
- int move_from_put;
int move_to_put;
struct list_head works;
int works_count;
@@ -561,8 +561,10 @@ static inline int ubi_io_write_data(struct ubi_device *ubi, const void *buf,
*/
static inline void ubi_ro_mode(struct ubi_device *ubi)
{
- ubi->ro_mode = 1;
- ubi_warn("switch to read-only mode");
+ if (!ubi->ro_mode) {
+ ubi->ro_mode = 1;
+ ubi_warn("switch to read-only mode");
+ }
}
/**