mtd: nand: teach write_page and write_page_raw return an error code
There is an implemention of hardware ECC write page function which may return an
error indication.
For instance, using Atmel HW PMECC to write one page into a nand flash, the hardware
engine will compute the BCH ecc code for this page. so we need read a the
status register to theck whether the ecc code is generated.
But we cannot assume the status register always can be ready, for example,
incorrect hardware configuration or hardware issue, in such case we need
write_page() to return a error code.
Since the definition of 'write_page' function in struct nand_ecc_ctrl is 'void'.
So this patch will:
1. add return 'int' value for 'write_page' function.
2. to be consitent, add return 'int' value for 'write_page_raw' fuctions too.
3. add code to test the return value, and if negative, indicate an
error happend when write page with ECC.
4. fix the compile warning in all impacted nand flash driver.
Note: I couldn't compile-test all of these easily, as some had ARCH dependencies.
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/nand/bcm_umi_bch.c b/drivers/mtd/nand/bcm_umi_bch.c
index 5914bb3..c8799a0 100644
--- a/drivers/mtd/nand/bcm_umi_bch.c
+++ b/drivers/mtd/nand/bcm_umi_bch.c
@@ -23,7 +23,7 @@
/* ---- Private Function Prototypes -------------------------------------- */
static int bcm_umi_bch_read_page_hwecc(struct mtd_info *mtd,
struct nand_chip *chip, uint8_t *buf, int oob_required, int page);
-static void bcm_umi_bch_write_page_hwecc(struct mtd_info *mtd,
+static int bcm_umi_bch_write_page_hwecc(struct mtd_info *mtd,
struct nand_chip *chip, const uint8_t *buf, int oob_required);
/* ---- Private Variables ------------------------------------------------ */
@@ -194,7 +194,7 @@
* @oob_required: must write chip->oob_poi to OOB
*
***************************************************************************/
-static void bcm_umi_bch_write_page_hwecc(struct mtd_info *mtd,
+static int bcm_umi_bch_write_page_hwecc(struct mtd_info *mtd,
struct nand_chip *chip, const uint8_t *buf, int oob_required)
{
int sectorIdx = 0;
@@ -214,4 +214,6 @@
}
bcm_umi_nand_write_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ return 0;
}
diff --git a/drivers/mtd/nand/bf5xx_nand.c b/drivers/mtd/nand/bf5xx_nand.c
index 3f1c185..ab0caa7 100644
--- a/drivers/mtd/nand/bf5xx_nand.c
+++ b/drivers/mtd/nand/bf5xx_nand.c
@@ -566,11 +566,13 @@
return 0;
}
-static void bf5xx_nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
- const uint8_t *buf, int oob_required)
+static int bf5xx_nand_write_page_raw(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf, int oob_required)
{
bf5xx_nand_write_buf(mtd, buf, mtd->writesize);
bf5xx_nand_write_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ return 0;
}
/*
diff --git a/drivers/mtd/nand/cafe_nand.c b/drivers/mtd/nand/cafe_nand.c
index ac0d967..08248a0 100644
--- a/drivers/mtd/nand/cafe_nand.c
+++ b/drivers/mtd/nand/cafe_nand.c
@@ -520,7 +520,7 @@
};
-static void cafe_nand_write_page_lowlevel(struct mtd_info *mtd,
+static int cafe_nand_write_page_lowlevel(struct mtd_info *mtd,
struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
@@ -531,6 +531,8 @@
/* Set up ECC autogeneration */
cafe->ctl2 |= (1<<30);
+
+ return 0;
}
static int cafe_nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
@@ -542,9 +544,12 @@
chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
if (unlikely(raw))
- chip->ecc.write_page_raw(mtd, chip, buf, oob_required);
+ status = chip->ecc.write_page_raw(mtd, chip, buf, oob_required);
else
- chip->ecc.write_page(mtd, chip, buf, oob_required);
+ status = chip->ecc.write_page(mtd, chip, buf, oob_required);
+
+ if (status < 0)
+ return status;
/*
* Cached progamming disabled for now, Not sure if its worth the
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
index 0650aaf..e706a23 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -1028,7 +1028,7 @@
/* writes a page. user specifies type, and this function handles the
* configuration details. */
-static void write_page(struct mtd_info *mtd, struct nand_chip *chip,
+static int write_page(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, bool raw_xfer)
{
struct denali_nand_info *denali = mtd_to_denali(mtd);
@@ -1078,6 +1078,8 @@
denali_enable_dma(denali, false);
dma_sync_single_for_cpu(denali->dev, addr, size, DMA_TO_DEVICE);
+
+ return 0;
}
/* NAND core entry points */
@@ -1086,24 +1088,24 @@
* writing a page with ECC or without is similar, all the work is done
* by write_page above.
* */
-static void denali_write_page(struct mtd_info *mtd, struct nand_chip *chip,
+static int denali_write_page(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
/* for regular page writes, we let HW handle all the ECC
* data written to the device. */
- write_page(mtd, chip, buf, false);
+ return write_page(mtd, chip, buf, false);
}
/* This is the callback that the NAND core calls to write a page without ECC.
* raw access is similar to ECC page writes, so all the work is done in the
* write_page() function above.
*/
-static void denali_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
+static int denali_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
/* for raw page writes, we want to disable ECC and simply write
whatever data is in the buffer. */
- write_page(mtd, chip, buf, true);
+ return write_page(mtd, chip, buf, true);
}
static int denali_write_oob(struct mtd_info *mtd, struct nand_chip *chip,
diff --git a/drivers/mtd/nand/docg4.c b/drivers/mtd/nand/docg4.c
index a225e49..0f2ffd7 100644
--- a/drivers/mtd/nand/docg4.c
+++ b/drivers/mtd/nand/docg4.c
@@ -898,7 +898,7 @@
write_nop(docptr);
}
-static void write_page(struct mtd_info *mtd, struct nand_chip *nand,
+static int write_page(struct mtd_info *mtd, struct nand_chip *nand,
const uint8_t *buf, bool use_ecc)
{
struct docg4_priv *doc = nand->priv;
@@ -950,15 +950,17 @@
write_nop(docptr);
writew(0, docptr + DOC_DATAEND);
write_nop(docptr);
+
+ return 0;
}
-static void docg4_write_page_raw(struct mtd_info *mtd, struct nand_chip *nand,
+static int docg4_write_page_raw(struct mtd_info *mtd, struct nand_chip *nand,
const uint8_t *buf, int oob_required)
{
return write_page(mtd, nand, buf, false);
}
-static void docg4_write_page(struct mtd_info *mtd, struct nand_chip *nand,
+static int docg4_write_page(struct mtd_info *mtd, struct nand_chip *nand,
const uint8_t *buf, int oob_required)
{
return write_page(mtd, nand, buf, true);
diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index 22bb5e6..8143873 100644
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -766,11 +766,13 @@
/* ECC will be calculated automatically, and errors will be detected in
* waitfunc.
*/
-static void fsl_elbc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
+static int fsl_elbc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
fsl_elbc_write_buf(mtd, buf, mtd->writesize);
fsl_elbc_write_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ return 0;
}
static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv)
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index c5d7f38..1f71b54 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -721,11 +721,13 @@
/* ECC will be calculated automatically, and errors will be detected in
* waitfunc.
*/
-static void fsl_ifc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
+static int fsl_ifc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
fsl_ifc_write_buf(mtd, buf, mtd->writesize);
fsl_ifc_write_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ return 0;
}
static int fsl_ifc_chip_init_tail(struct mtd_info *mtd)
diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
index 6574c6f..d6fa8f4 100644
--- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
@@ -930,7 +930,7 @@
return ret;
}
-static void gpmi_ecc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
+static int gpmi_ecc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
struct gpmi_nand_data *this = chip->priv;
@@ -972,7 +972,7 @@
&payload_virt, &payload_phys);
if (ret) {
pr_err("Inadequate payload DMA buffer\n");
- return;
+ return 0;
}
ret = send_page_prepare(this,
@@ -1002,6 +1002,8 @@
nfc_geo->payload_size,
payload_virt, payload_phys);
}
+
+ return 0;
}
/*
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 0a8724e..98ba46e 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1911,12 +1911,14 @@
*
* Not for syndrome calculating ECC controllers, which use a special oob layout.
*/
-static void nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
+static int nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
chip->write_buf(mtd, buf, mtd->writesize);
if (oob_required)
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ return 0;
}
/**
@@ -1928,7 +1930,7 @@
*
* We need a special oob layout and handling even when ECC isn't checked.
*/
-static void nand_write_page_raw_syndrome(struct mtd_info *mtd,
+static int nand_write_page_raw_syndrome(struct mtd_info *mtd,
struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
@@ -1958,6 +1960,8 @@
size = mtd->oobsize - (oob - chip->oob_poi);
if (size)
chip->write_buf(mtd, oob, size);
+
+ return 0;
}
/**
* nand_write_page_swecc - [REPLACEABLE] software ECC based page write function
@@ -1966,7 +1970,7 @@
* @buf: data buffer
* @oob_required: must write chip->oob_poi to OOB
*/
-static void nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
+static int nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
int i, eccsize = chip->ecc.size;
@@ -1983,7 +1987,7 @@
for (i = 0; i < chip->ecc.total; i++)
chip->oob_poi[eccpos[i]] = ecc_calc[i];
- chip->ecc.write_page_raw(mtd, chip, buf, 1);
+ return chip->ecc.write_page_raw(mtd, chip, buf, 1);
}
/**
@@ -1993,7 +1997,7 @@
* @buf: data buffer
* @oob_required: must write chip->oob_poi to OOB
*/
-static void nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
+static int nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
int i, eccsize = chip->ecc.size;
@@ -2013,6 +2017,8 @@
chip->oob_poi[eccpos[i]] = ecc_calc[i];
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ return 0;
}
/**
@@ -2025,7 +2031,7 @@
* The hw generator calculates the error syndrome automatically. Therefore we
* need a special oob layout and handling.
*/
-static void nand_write_page_syndrome(struct mtd_info *mtd,
+static int nand_write_page_syndrome(struct mtd_info *mtd,
struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
@@ -2059,6 +2065,8 @@
i = mtd->oobsize - (oob - chip->oob_poi);
if (i)
chip->write_buf(mtd, oob, i);
+
+ return 0;
}
/**
@@ -2080,9 +2088,12 @@
chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
if (unlikely(raw))
- chip->ecc.write_page_raw(mtd, chip, buf, oob_required);
+ status = chip->ecc.write_page_raw(mtd, chip, buf, oob_required);
else
- chip->ecc.write_page(mtd, chip, buf, oob_required);
+ status = chip->ecc.write_page(mtd, chip, buf, oob_required);
+
+ if (status < 0)
+ return status;
/*
* Cached progamming disabled for now. Not sure if it's worth the
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index afc4681..e8a1ae9 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -681,11 +681,13 @@
info->state = STATE_IDLE;
}
-static void pxa3xx_nand_write_page_hwecc(struct mtd_info *mtd,
+static int pxa3xx_nand_write_page_hwecc(struct mtd_info *mtd,
struct nand_chip *chip, const uint8_t *buf, int oob_required)
{
chip->write_buf(mtd, buf, mtd->writesize);
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ return 0;
}
static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
diff --git a/drivers/mtd/nand/sh_flctl.c b/drivers/mtd/nand/sh_flctl.c
index 2eb1541..ed03ed2 100644
--- a/drivers/mtd/nand/sh_flctl.c
+++ b/drivers/mtd/nand/sh_flctl.c
@@ -399,11 +399,12 @@
return 0;
}
-static void flctl_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
+static int flctl_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
chip->write_buf(mtd, buf, mtd->writesize);
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
+ return 0;
}
static void execmd_read_page_sector(struct mtd_info *mtd, int page_addr)