Patchwork [1/8] arm: sam9_l9260_defconfig: adjust UBI bad eraseblocks limit

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Submitter Artem Bityutskiy
Date Aug. 19, 2012, 7:29 p.m.
Message ID <1345404573.1930.9.camel@kyv>
Download mbox | patch
Permalink /patch/178582/
State New
Headers show

Comments

Artem Bityutskiy - Aug. 19, 2012, 7:29 p.m.
On Sun, 2012-08-19 at 22:21 +0300, Artem Bityutskiy wrote:
> I'll just remove this from from the defconfig and make it use the
> default, which is more sensible for this device, as your research
> showed.

Actually, pushed this patch to l2-mtd.git:


From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Date: Sun, 19 Aug 2012 22:22:23 +0300
Subject: [PATCH] arm: sam9_l9260_defconfig: correct CONFIG_MTD_UBI_BEB_LIMIT

UBI has changed the MTD_UBI_BEB_LIMIT semantics. It used to be a percent of
total amount of eraseblock in the partition, and now it is the maximum
amount of bad eraseblocks on the entire devise per 1024 eraseblocks. So not
only the units changed, but also the meaning.

Richard Genoud <richard.genoud@gmail.com> says:

"I found the board:
https://www.olimex.com/dev/sam9-L9260.html
and the nand datasheet:
http://www.rockbox.org/wiki/pub/Main/LyrePrototype/K9xxG08UXM.pdf
page 11, we can see that the max_bad_bebper1024 is 25 (100 for 4096)"

Thus, use "25" for sam9.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
---
 arch/arm/configs/sam9_l9260_defconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/arch/arm/configs/sam9_l9260_defconfig b/arch/arm/configs/sam9_l9260_defconfig
index da276f9..b4384af 100644
--- a/arch/arm/configs/sam9_l9260_defconfig
+++ b/arch/arm/configs/sam9_l9260_defconfig
@@ -39,7 +39,7 @@  CONFIG_MTD_NAND=y
 CONFIG_MTD_NAND_ATMEL=y
 CONFIG_MTD_NAND_PLATFORM=y
 CONFIG_MTD_UBI=y
-CONFIG_MTD_UBI_BEB_LIMIT=3
+CONFIG_MTD_UBI_BEB_LIMIT=25
 CONFIG_MTD_UBI_GLUEBI=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_RAM=y