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mtd: gpmi: fix ECC regression

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The "legacy" ECC layout used until 3.12-rc1 uses all the OOB area by
computing the ECC strength and ECC step size ourselves.

Commit 2febcdf84b ("mtd: gpmi: set the BCHs geometry with the ecc info")
makes the driver use the ECC info (ECC strength and ECC step size)
provided by the MTD code, and creates a different NAND ECC layout
for the BCH, and use the new ECC layout. This causes a regression:

   We can not mount the ubifs which was created by the old NAND ECC layout.

This patch fixes this issue by reverting to the legacy ECC layout.

We will probably introduce a new device-tree property to indicate that
the new ECC layout can be used. For now though, for the imminent 3.12
release, we just unconditionally revert to the 3.11 behaviour.

This leaves a harmless cosmetic warning about an unused function. At
this point in the cycle I really don't care.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Huang Shijie <b32955@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
Tested-by: Marek Vasut <marex@denx.de>
This commit is contained in:
David Woodhouse 2013-10-25 15:03:59 +01:00 committed by Brian Norris
parent 18a84e935e
commit 031e2777e0
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/nand/gpmi-nand/gpmi-nand.c
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@ -349,7 +349,7 @@ static int legacy_set_geometry(struct gpmi_nand_data *this)
int common_nfc_set_geometry(struct gpmi_nand_data *this) int common_nfc_set_geometry(struct gpmi_nand_data *this)
{ {
return set_geometry_by_ecc_info(this) ? 0 : legacy_set_geometry(this); return legacy_set_geometry(this);
} }
struct dma_chan *get_dma_chan(struct gpmi_nand_data *this) struct dma_chan *get_dma_chan(struct gpmi_nand_data *this)