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mtd: omap3: nand: report corrected ecc errors
The number of corrected ECC errors should be reported since other MTD systems make use of this information (such as UBI data scrubbing). Signed-off-by: John Ogness <john.ogness@linutronix.de> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -517,6 +517,8 @@ static void gen_true_ecc(u8 *ecc_buf)
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*
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* This function compares two ECC's and indicates if there is an error.
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* If the error can be corrected it will be corrected to the buffer.
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* If there is no error, %0 is returned. If there is an error but it
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* was corrected, %1 is returned. Otherwise, %-1 is returned.
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*/
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static int omap_compare_ecc(u8 *ecc_data1, /* read from NAND memory */
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u8 *ecc_data2, /* read from register */
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@ -622,7 +624,7 @@ static int omap_compare_ecc(u8 *ecc_data1, /* read from NAND memory */
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page_data[find_byte] ^= (1 << find_bit);
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return 0;
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return 1;
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default:
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if (isEccFF) {
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if (ecc_data2[0] == 0 &&
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@ -643,8 +645,11 @@ static int omap_compare_ecc(u8 *ecc_data1, /* read from NAND memory */
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* @calc_ecc: ecc read from HW ECC registers
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*
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* Compares the ecc read from nand spare area with ECC registers values
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* and if ECC's mismached, it will call 'omap_compare_ecc' for error detection
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* and correction.
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* and if ECC's mismatched, it will call 'omap_compare_ecc' for error
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* detection and correction. If there are no errors, %0 is returned. If
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* there were errors and all of the errors were corrected, the number of
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* corrected errors is returned. If uncorrectable errors exist, %-1 is
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* returned.
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*/
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static int omap_correct_data(struct mtd_info *mtd, u_char *dat,
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u_char *read_ecc, u_char *calc_ecc)
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@ -652,6 +657,7 @@ static int omap_correct_data(struct mtd_info *mtd, u_char *dat,
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struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
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mtd);
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int blockCnt = 0, i = 0, ret = 0;
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int stat = 0;
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/* Ex NAND_ECC_HW12_2048 */
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if ((info->nand.ecc.mode == NAND_ECC_HW) &&
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@ -665,12 +671,14 @@ static int omap_correct_data(struct mtd_info *mtd, u_char *dat,
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ret = omap_compare_ecc(read_ecc, calc_ecc, dat);
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if (ret < 0)
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return ret;
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/* keep track of the number of corrected errors */
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stat += ret;
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}
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read_ecc += 3;
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calc_ecc += 3;
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dat += 512;
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}
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return 0;
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return stat;
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}
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/**
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