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path: root/drivers/mtd/ubi/eba.c
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Diffstat (limited to 'drivers/mtd/ubi/eba.c')
-rw-r--r--drivers/mtd/ubi/eba.c21
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 5b9834cf2..96fddb016 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -426,8 +426,25 @@ retry:
pnum, vol_id, lnum);
err = -EBADMSG;
} else {
- err = -EINVAL;
- ubi_ro_mode(ubi);
+ /*
+ * Ending up here in the non-Fastmap case
+ * is a clear bug as the VID header had to
+ * be present at scan time to have it referenced.
+ * With fastmap the story is more complicated.
+ * Fastmap has the mapping info without the need
+ * of a full scan. So the LEB could have been
+ * unmapped, Fastmap cannot know this and keeps
+ * the LEB referenced.
+ * This is valid and works as the layer above UBI
+ * has to do bookkeeping about used/referenced
+ * LEBs in any case.
+ */
+ if (ubi->fast_attach) {
+ err = -EBADMSG;
+ } else {
+ err = -EINVAL;
+ ubi_ro_mode(ubi);
+ }
}
}
goto out_free;