From d09807ad144cb2fe3745a58caadf9a4192038839 Mon Sep 17 00:00:00 2001 From: Dario Binacchi Date: Sun, 30 Oct 2022 15:14:13 +0100 Subject: [PATCH] cmd: mtd: check if a block has to be skipped or erased 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/20221006031501.110290-2-mikhail.kshevetskiy@iopsys.eu/ Suggested-by: Michael Trimarchi Co-developed-by: Michael Trimarchi Signed-off-by: Michael Trimarchi Co-developed-by: Mikhail Kshevetskiy Signed-off-by: Mikhail Kshevetskiy Tested-by: Mikhail Kshevetskiy Signed-off-by: Dario Binacchi --- cmd/mtd.c | 28 ++++++++++++++++++++-------- 1 file changed, 20 insertions(+), 8 deletions(-) diff --git a/cmd/mtd.c b/cmd/mtd.c index ad5cc9827d..eb6e2d6892 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 && ret != -EIO) + break; + len -= mtd->erasesize; erase_op.addr += mtd->erasesize; } -- 2.39.5