[PATCH v2] mtd: nand: omap: fix BCHx ecc.correct to return detected bit-flips in erased-page

Gupta, Pekon pekon at ti.com
Tue Apr 22 23:29:47 PDT 2014


Hi Brian,

>>fixes: commit 62116e5171e00f85a8d53f76e45b84423c89ff34
>>       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 at gmail.com>
>>Signed-off-by: Pekon Gupta <pekon at ti.com>
>>---
>I you think this qualifies for stable then please mark it for
>CC: <stable at vger.kernel.org> # 3.9.x+
>
>
Ping on this.. 

with regards, pekon



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