aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux')
-rw-r--r--target/linux/bcm63xx/patches-5.4/434-nand-brcmnand-fix-OOB-R-W-with-Hamming-ECC.patch34
-rw-r--r--target/linux/bcm63xx/patches-5.4/434-nand-raw-use-write_oob_raw-for-MTD_OPS_AUTO_OOB-mode.patch11
2 files changed, 34 insertions, 11 deletions
diff --git a/target/linux/bcm63xx/patches-5.4/434-nand-brcmnand-fix-OOB-R-W-with-Hamming-ECC.patch b/target/linux/bcm63xx/patches-5.4/434-nand-brcmnand-fix-OOB-R-W-with-Hamming-ECC.patch
new file mode 100644
index 0000000000..c3bb1ae1e8
--- /dev/null
+++ b/target/linux/bcm63xx/patches-5.4/434-nand-brcmnand-fix-OOB-R-W-with-Hamming-ECC.patch
@@ -0,0 +1,34 @@
+From cf0d2fbaae9e962d91a321de75e0d4f9f9ccbdfe Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
+Date: Thu, 21 Jan 2021 18:17:37 +0100
+Subject: [PATCH] nand: brcmnand: fix OOB R/W with Hamming ECC
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Hamming ECC doesn't cover the OOB data, so reading or writing OOB shall
+always be done without ECC enabled.
+This is a problem when adding JFFS2 cleanmarkers to erased blocks. When JFFS2
+clenmarkers are added to the OOB with ECC enabled, OOB bytes will be changed
+from ff ff ff to 00 00 00, reporting incorrect ECC errors.
+
+Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
+---
+ drivers/mtd/nand/raw/brcmnand/brcmnand.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
++++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+@@ -2426,6 +2426,12 @@ static int brcmnand_attach_chip(struct n
+
+ ret = brcmstb_choose_ecc_layout(host);
+
++ /* If OOB is written with ECC enabled it will cause ECC errors */
++ if (is_hamming_ecc(host->ctrl, &host->hwcfg)) {
++ chip->ecc.write_oob = brcmnand_write_oob_raw;
++ chip->ecc.read_oob = brcmnand_read_oob_raw;
++ }
++
+ return ret;
+ }
+
diff --git a/target/linux/bcm63xx/patches-5.4/434-nand-raw-use-write_oob_raw-for-MTD_OPS_AUTO_OOB-mode.patch b/target/linux/bcm63xx/patches-5.4/434-nand-raw-use-write_oob_raw-for-MTD_OPS_AUTO_OOB-mode.patch
deleted file mode 100644
index cf4322f29f..0000000000
--- a/target/linux/bcm63xx/patches-5.4/434-nand-raw-use-write_oob_raw-for-MTD_OPS_AUTO_OOB-mode.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- a/drivers/mtd/nand/raw/nand_base.c
-+++ b/drivers/mtd/nand/raw/nand_base.c
-@@ -488,7 +488,7 @@ static int nand_do_write_oob(struct nand
-
- nand_fill_oob(chip, ops->oobbuf, ops->ooblen, ops);
-
-- if (ops->mode == MTD_OPS_RAW)
-+ if (ops->mode == MTD_OPS_AUTO_OOB || ops->mode == MTD_OPS_RAW)
- status = chip->ecc.write_oob_raw(chip, page & chip->pagemask);
- else
- status = chip->ecc.write_oob(chip, page & chip->pagemask);