[PATCH v4 06/11] mtd: nand: WARN() if EEC Bytes per page is larger than the OOB
From: Lee Jones <hidden>
Date: 2014-11-05 17:00:40
Also in:
lkml
Subsystem:
memory technology devices (mtd), nand flash subsystem, the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Linus Torvalds
EEC information is held in the Out-Of-Bounds (OOB) area, so can not be larger than the area it's stored in. If the math is out, we issue a warning to the user. Signed-off-by: Lee Jones <redacted> --- drivers/mtd/nand/nand_base.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 4f3e80c..d0ebb05 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c@@ -4063,6 +4063,8 @@ int nand_scan_tail(struct mtd_info *mtd) } ecc->total = ecc->steps * ecc->bytes; + WARN_ON(ecc->total > mtd->oobsize); + /* Allow subpage writes up to ecc.steps. Not possible for MLC flash */ if (!(chip->options & NAND_NO_SUBPAGE_WRITE) && nand_is_slc(chip)) { switch (ecc->steps) {
--
1.9.1