Eric Lee / linux-smarc-t335x-v3.2

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Commit 00f5e098a16411ec5d5508815d17edf5bbd79909

Authored by Philip, Avinash
1 parent 05d90d89f9
Exists in master

arm:omap:nand - BCH8 read path corrected. 

NAND read path for BCH8 is corrected to handle reading of erased pages.
Previously on nand read, ecc was taken from wrong offset in oob_poi buffer
and was giving non-0xff data and hence was giving ecc uncorrectable issue
on erased pages.

Signed-off-by: Philip, Avinash <avinashphilip@ti.com>

Showing 1 changed file with 3 additions and 4 deletions Side-by-side Diff

drivers/mtd/nand/omap2.c
Diff comments   View file @ 00f5e09
... ... @@ -816,7 +816,7 @@
816 816 uint8_t *ecc_calc = chip->buffers->ecccalc;
817 817 uint8_t *ecc_code = chip->buffers->ecccode;
818 818 uint32_t *eccpos = chip->ecc.layout->eccpos;
819   - uint8_t *oob = chip->oob_poi;
  819 + uint8_t *oob = &chip->oob_poi[eccpos[0]];
820 820 uint32_t data_pos;
821 821 uint32_t oob_pos;
822 822  
823 823  
... ... @@ -836,10 +836,9 @@
836 836 /* read respective ecc from oob area */
837 837 chip->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_pos, page);
838 838  
839   - if (info->ecc_opt == OMAP_ECC_BCH8_CODE_HW) {
  839 + if (info->ecc_opt == OMAP_ECC_BCH8_CODE_HW)
840 840 chip->read_buf(mtd, oob, 13);
841   - oob++;
842   - } else
  841 + else
843 842 chip->read_buf(mtd, oob, eccbytes);
844 843 /* read syndrome */
845 844 chip->ecc.calculate(mtd, p, &ecc_calc[i]);