As reported by patch [1], the `mtd erase' command should not erase bad blocks. To force bad block erasing you have to use the `mtd erase.dontskipbad' command.
This patch tries to fix the same issue without modifying code taken from the linux kernel, in order to make further upgrades easier. [1] https://lore.kernel.org/all/[email protected]/ Signed-off-by: Dario Binacchi <[email protected]> Suggested-by: Michael Trimarchi <[email protected]> Co-developed-by: Michael Trimarchi <[email protected]> Signed-off-by: Michael Trimarchi <[email protected]> Cc: Mikhail Kshevetskiy <[email protected]> --- cmd/mtd.c | 28 ++++++++++++++++++++-------- 1 file changed, 20 insertions(+), 8 deletions(-) diff --git a/cmd/mtd.c b/cmd/mtd.c index ad5cc9827d55..3330a428c018 100644 --- a/cmd/mtd.c +++ b/cmd/mtd.c @@ -434,19 +434,31 @@ static int do_mtd_erase(struct cmd_tbl *cmdtp, int flag, int argc, erase_op.mtd = mtd; erase_op.addr = off; erase_op.len = mtd->erasesize; - erase_op.scrub = scrub; while (len) { - ret = mtd_erase(mtd, &erase_op); + if (!scrub) { + ret = mtd_block_isbad(mtd, erase_op.addr); + if (ret < 0) { + printf("Failed to get bad block at 0x%08llx\n", + erase_op.addr); + ret = CMD_RET_FAILURE; + goto out_put_mtd; + } - if (ret) { - /* Abort if its not a bad block error */ - if (ret != -EIO) - break; - printf("Skipping bad block at 0x%08llx\n", - erase_op.addr); + if (ret > 0) { + printf("Skipping bad block at 0x%08llx\n", + erase_op.addr); + ret = 0; + len -= mtd->erasesize; + erase_op.addr += mtd->erasesize; + continue; + } } + ret = mtd_erase(mtd, &erase_op); + if (ret) + break; + len -= mtd->erasesize; erase_op.addr += mtd->erasesize; } -- 2.32.0
