diff options
| author | Stefan Agner <stefan.agner@toradex.com> | 2015-01-07 18:39:57 +0100 |
|---|---|---|
| committer | Stefan Agner <stefan.agner@toradex.com> | 2015-01-07 18:39:57 +0100 |
| commit | 90f60ffa754e468c4862d24cccde4bfc6da8e791 (patch) | |
| tree | 0cbf72f0e26640b35824ba0d2fc88fd90b483e25 | |
| parent | f7e57f71da1eecbf1ac28339868d15492c929925 (diff) | |
mtd: vf610_nfc: allow bitflips in an empty page
Allow bit flips in a empty page up to half of the recoverable
bits (strength / 2). Some flash show bit flips in empty pages
which are larger then the corrected bit count according to the
ECC controller. It is not yet clear how to solve this correctly,
discussion is ongoing:
http://thread.gmane.org/gmane.linux.ports.arm.kernel/295424
Since we habe a 24-bit correction, this allows up to 12 bit
flips on a empty page before reporting it as page with ECC
errors.
| -rw-r--r-- | drivers/mtd/nand/vf610_nfc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mtd/nand/vf610_nfc.c b/drivers/mtd/nand/vf610_nfc.c index 1af314f87d..baf9084f1e 100644 --- a/drivers/mtd/nand/vf610_nfc.c +++ b/drivers/mtd/nand/vf610_nfc.c @@ -521,7 +521,7 @@ static inline int vf610_nfc_correct_data(struct mtd_info *mtd, u_char *dat) flip = count_written_bits(dat, nfc->chip.ecc.size, ecc_count); /* ECC failed. */ - if (flip > ecc_count) { + if (flip > ecc_count && flip > (nfc->chip.ecc.strength / 2)) { nfc->page = -1; return -1; } |