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-rw-r--r--drivers/mtd/ubi/build.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index a7571508fdab..e26fe12b1aae 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -1114,8 +1114,11 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
ubi_msg(ubi, "detaching mtd%d", ubi->mtd->index);
#ifdef CONFIG_MTD_UBI_FASTMAP
/* If we don't write a new fastmap at detach time we lose all
- * EC updates that have been made since the last written fastmap. */
- ubi_update_fastmap(ubi);
+ * EC updates that have been made since the last written fastmap.
+ * In case of fastmap debugging we omit the update to simulate an
+ * unclean shutdown. */
+ if (!ubi_dbg_chk_fastmap(ubi))
+ ubi_update_fastmap(ubi);
#endif
/*
* Before freeing anything, we have to stop the background thread to
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