[PATCH v4 09/15] mtd: rawnand: qcom: parse read errors for read oob also

Abhishek Sahu
2018-06-20T08:52:24Z

read_page and read_oob both calls the read_page_ecc function.
The QCOM NAND controller protect the OOB available bytes with
ECC so read errors should be checked for read_oob also.
This patch moves the error checking code inside read_page_ecc
so caller does not have to check explicitly for read errors.

Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
---
* Changes from v3:
NONE

* Changes from v2:
NONE

* Changes from v1:
1. Minor code change for return early in case of error

drivers/mtd/nand/raw/qcom_nandc.c | 26 +++++++++-----------------
1 file changed, 9 insertions(+), 17 deletions(-)

diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index a831f9c..285b2ad3 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -1698,6 +1698,7 @@ static int read_page_ecc(struct qcom_nand_host *host, u8 *data_buf,
struct nand_chip *chip = &host->chip;
struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
struct nand_ecc_ctrl *ecc = &chip->ecc;
+ u8 *data_buf_start = data_buf, *oob_buf_start = oob_buf;
int i, ret;

config_nand_page_read(nandc);
@@ -1758,12 +1759,14 @@ static int read_page_ecc(struct qcom_nand_host *host, u8 *data_buf,
}

ret = submit_descs(nandc);
- if (ret)
+ free_descs(nandc);
+
+ if (ret) {
dev_err(nandc->dev, "failure to read page/oob\n");
+ return ret;
+ }

- free_descs(nandc);
-
- return ret;
+ return parse_read_errors(host, data_buf_start, oob_buf_start);
}

/*
@@ -1808,20 +1811,14 @@ static int qcom_nandc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
struct qcom_nand_host *host = to_qcom_nand_host(chip);
struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
u8 *data_buf, *oob_buf = NULL;
- int ret;

nand_read_page_op(chip, page, 0, NULL, 0);
data_buf = buf;
oob_buf = oob_required ? chip->oob_poi : NULL;

clear_bam_transaction(nandc);
- ret = read_page_ecc(host, data_buf, oob_buf);
- if (ret) {
- dev_err(nandc->dev, "failure to read page\n");
- return ret;
- }

- return parse_read_errors(host, data_buf, oob_buf);
+ return read_page_ecc(host, data_buf, oob_buf);
}

/* implements ecc->read_page_raw() */
@@ -1911,7 +1908,6 @@ static int qcom_nandc_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
struct qcom_nand_host *host = to_qcom_nand_host(chip);
struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
struct nand_ecc_ctrl *ecc = &chip->ecc;
- int ret;

clear_read_regs(nandc);
clear_bam_transaction(nandc);
@@ -1920,11 +1916,7 @@ static int qcom_nandc_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
set_address(host, 0, page);
update_rw_regs(host, ecc->steps, true);

- ret = read_page_ecc(host, NULL, chip->oob_poi);
- if (ret)
- dev_err(nandc->dev, "failure to read oob\n");
-
- return ret;
+ return read_page_ecc(host, NULL, chip->oob_poi);
}

/* implements ecc->write_page() */