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| author | Miquel Raynal <miquel.raynal@bootlin.com> | 2021-06-10 16:39:45 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-22 12:27:59 +0200 |
| commit | 619f137ffd691708fec72c785db497fb85b16cd5 (patch) | |
| tree | 11ba7a3e309d1f6a2e002ededbcdc0b5cecc9bff | |
| parent | 49cf30ebb35c50234144dd2a34fe7a6d50b966e2 (diff) | |
| download | linux-stable-619f137ffd691708fec72c785db497fb85b16cd5.tar.gz linux-stable-619f137ffd691708fec72c785db497fb85b16cd5.tar.bz2 linux-stable-619f137ffd691708fec72c785db497fb85b16cd5.zip | |
dt-bindings: mtd: gpmc: Fix the ECC bytes vs. OOB bytes equation
[ Upstream commit 778cb8e39f6ec252be50fc3850d66f3dcbd5dd5a ]
"PAGESIZE / 512" is the number of ECC chunks.
"ECC_BYTES" is the number of bytes needed to store a single ECC code.
"2" is the space reserved by the bad block marker.
"2 + (PAGESIZE / 512) * ECC_BYTES" should of course be lower or equal
than the total number of OOB bytes, otherwise it won't fit.
Fix the equation by substituting s/>=/<=/.
Suggested-by: Ryan J. Barnett <ryan.barnett@collins.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/linux-mtd/20210610143945.3504781-1-miquel.raynal@bootlin.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/mtd/gpmc-nand.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt index 44919d48d241..c459f169a904 100644 --- a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt +++ b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt @@ -122,7 +122,7 @@ on various other factors also like; so the device should have enough free bytes available its OOB/Spare area to accommodate ECC for entire page. In general following expression helps in determining if given device can accommodate ECC syndrome: - "2 + (PAGESIZE / 512) * ECC_BYTES" >= OOBSIZE" + "2 + (PAGESIZE / 512) * ECC_BYTES" <= OOBSIZE" where OOBSIZE number of bytes in OOB/spare area PAGESIZE number of bytes in main-area of device page |