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This patch provides the possibility to adjust the "maximum expected number of bad blocks per 1024 blocks" (max_beb_per1024) for each mtd device. The majority of NAND devices have their max_beb_per1024 equal to 20, but sometimes it's more. Now, we can adjust that via a kernel parameter: ubi.mtd=<name|num|path>[,<vid_hdr_offs>[,max_beb_per1024]] Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>