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[2/6] UBI: Fastmap: Enhance fastmap checking

Message ID 1417349728-9070-3-git-send-email-richard@nod.at
State Accepted
Headers show

Commit Message

Richard Weinberger Nov. 30, 2014, 12:15 p.m. UTC 
Don't update the fastmap upon detach if fastmap checking is enabled.
This is poor men's power cut testing feature. :-)

Signed-off-by: Richard Weinberger <richard@nod.at>
---
 drivers/mtd/ubi/build.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 3c999e5..12f4776 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