diff options
Diffstat (limited to 'target/linux/pistachio/patches-4.9/411-mtd-nand-Check-length-of-ID-before-reading-bits-per-.patch')
| -rw-r--r-- | target/linux/pistachio/patches-4.9/411-mtd-nand-Check-length-of-ID-before-reading-bits-per-.patch | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/target/linux/pistachio/patches-4.9/411-mtd-nand-Check-length-of-ID-before-reading-bits-per-.patch b/target/linux/pistachio/patches-4.9/411-mtd-nand-Check-length-of-ID-before-reading-bits-per-.patch new file mode 100644 index 0000000000..cd2f8bb123 --- /dev/null +++ b/target/linux/pistachio/patches-4.9/411-mtd-nand-Check-length-of-ID-before-reading-bits-per-.patch @@ -0,0 +1,38 @@ +From 42ebff638003be18fab503b37de4ad7853244e95 Mon Sep 17 00:00:00 2001 +From: Ezequiel Garcia <ezequiel.garcia@imgtec.com> +Date: Sat, 25 Feb 2017 15:58:22 +0000 +Subject: mtd: nand: Check length of ID before reading bits per cell + +The table-based NAND identification currently reads the number +of bits per cell from the 3rd byte of the extended ID. This is done +for the so-called 'full ID' devices; i.e. devices that have a known +length ID. + +However, if the ID length is shorter than three, there's no 3rd byte, +and so it's wrong to read the bits per cell from there. Fix this by +adding a check for the ID length. + +(picked from http://lists.infradead.org/pipermail/linux-mtd/2014-December/056764.html) + +Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com> +--- + drivers/mtd/nand/nand_base.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c +index 3bde96a..69b5cac 100644 +--- a/drivers/mtd/nand/nand_base.c ++++ b/drivers/mtd/nand/nand_base.c +@@ -3964,7 +3964,8 @@ static bool find_full_id_nand(struct mtd_info *mtd, struct nand_chip *chip, + mtd->erasesize = type->erasesize; + mtd->oobsize = type->oobsize; + +- chip->bits_per_cell = nand_get_bits_per_cell(id_data[2]); ++ if (type->id_len > 2) ++ chip->bits_per_cell = nand_get_bits_per_cell(id_data[2]); + chip->chipsize = (uint64_t)type->chipsize << 20; + chip->options |= type->options; + chip->ecc_strength_ds = NAND_ECC_STRENGTH(type); +-- +2.7.4 + |