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mtd: nand-mxs: Return bitflips 

The read_page hook shall return the number of bitflips. Implement
that.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2014-04-29 10:53:15 +02:00
parent 3fafc8e5c7
commit eecac38c2c
1 changed files with 4 additions and 1 deletions
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5
drivers/mtd/nand/nand_mxs.c
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@ -661,6 +661,7 @@ static int mxs_nand_ecc_read_page(struct mtd_info *mtd, struct nand_chip *nand,
uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip; uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip;
uint32_t corrected = 0, failed = 0; uint32_t corrected = 0, failed = 0;
uint8_t *status; uint8_t *status;
unsigned int max_bitflips = 0;
int i, ret; int i, ret;
/* Compile the DMA descriptor - wait for ready. */ /* Compile the DMA descriptor - wait for ready. */
@ -766,6 +767,7 @@ static int mxs_nand_ecc_read_page(struct mtd_info *mtd, struct nand_chip *nand,
} }
corrected += status[i]; corrected += status[i];
max_bitflips = max_t(unsigned int, max_bitflips, status[i]);
} }
/* Propagate ECC status to the owning MTD. */ /* Propagate ECC status to the owning MTD. */
@ -787,10 +789,11 @@ static int mxs_nand_ecc_read_page(struct mtd_info *mtd, struct nand_chip *nand,
memcpy(buf, nand_info->data_buf, mtd->writesize); memcpy(buf, nand_info->data_buf, mtd->writesize);
ret = 0;
rtn: rtn:
mxs_nand_return_dma_descs(nand_info); mxs_nand_return_dma_descs(nand_info);
return ret; return ret ? ret : max_bitflips;
} }
/* /*