mtd: nand: omap: fix BCHx ecc.correct to return detected bit-flips in erased-page

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commit f306e8c3b6 upstream.

fixes: commit 62116e5171
       mtd: nand: omap2: Support for hardware BCH error correction.

In omap_elm_correct_data(), if bitflip_count in an erased-page is within the
correctable limit (< ecc.strength), then it is not indicated back to the caller
ecc->read_page().

This mis-guides upper layers like MTD and UBIFS layer to assume erased-page as
perfectly clean and use it for writing even if actual bitflip_count was
dangerously high (bitflip_count > mtd->bitflip_threshold).

This patch fixes this above issue, by returning 'stats' to caller
ecc->read_page() under all scenarios.

Reported-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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pekon gupta 2014-03-20 18:49:58 +05:30 • committed by Greg Kroah-Hartman

parent 2013130121

commit 66b33aa964

1 changed files with 1 additions and 1 deletions

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drivers/mtd/nand/omap2.c

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