ubi: fastmap: Erase outdated anchor PEBs during attach

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The fastmap update code might erase the current fastmap anchor PEB
in case it doesn't find any new free PEB. When a power cut happens
in this situation we must not have any outdated fastmap anchor PEB
on the device, because that would be used to attach during next
boot.
The easiest way to make that sure is to erase all outdated fastmap
anchor PEBs synchronously during attach.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Richard Weinberger <richard@nod.at>
Fixes: dbb7d2a88d ("UBI: Add fastmap core")
Cc: <stable@vger.kernel.org>
Signed-off-by: Richard Weinberger <richard@nod.at>

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Sascha Hauer 2017-12-05 16:01:20 +01:00 • committed by Richard Weinberger

parent 252153ba51

commit f78e5623f4

1 changed files with 57 additions and 20 deletions

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77

drivers/mtd/ubi/wl.c

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