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commit2365418879upstream. When Fastmap is used we can face here an -EBADMSG since Fastmap cannot know about unmaps. If the erasure was interrupted the PEB may show ECC errors and UBI would go to ro-mode as it assumes that the PEB was check during attach time, which is not the case with Fastmap. Fixes:dbb7d2a88d("UBI: Add fastmap core") Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>