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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2007-12-17 13:21:07 +0200
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2007-12-26 19:15:15 +0200
commitc63a491d3737aec3c47c5e785d87021752ad9fa6 (patch)
tree0fc3a0dee3493d52997426a745c52ff8d2287225 /drivers/mtd
parentcae0a77125467c42f0918e78457913ee4a2f925b (diff)
UBI: add some more comments
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/ubi/eba.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index b2b0f29bdc5..2ff34923e51 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -797,7 +797,7 @@ write_error:
/*
* ubi_eba_atomic_leb_change - change logical eraseblock atomically.
* @ubi: UBI device description object
- * @vol: volume escription object
+ * @vol: volume description object
* @lnum: logical eraseblock number
* @buf: data to write
* @len: how many bytes to write
@@ -955,6 +955,12 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
/*
* We may race with volume deletion/re-size, so we have to hold
* @ubi->volumes_lock.
+ *
+ * Note, it is not a problem if we race with volume deletion or re-size
+ * here. If the volume is deleted or re-sized while we are moving an
+ * eraseblock which belongs to this volume, we'll end up with finding
+ * out that this LEB was unmapped at the end (see WL), and drop this
+ * PEB.
*/
spin_lock(&ubi->volumes_lock);
vol = ubi->volumes[idx];