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nand: fix data corruption after mtd write

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PD#138714: fix data corruption after mtd write

nand_chip.erase is obligatory, without this implement, nand write
will fail and cause ecc fail next time read data.

Change-Id: I79cabce7c03938e13785ecc42d48b9e750508f3e
Signed-off-by: Frank Chen <frank.chen@amlogic.com>
This commit is contained in:
Frank Chen
2017-03-25 22:52:28 +08:00
committed by Victor Wan
parent e034ee78e9
commit 08e78d81be
3 changed files with 6 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/amlogic/mtd/aml_mtd.h
View File

@@ -798,7 +798,7 @@ void aml_nand_command(struct mtd_info *mtd,
int aml_nand_wait(struct mtd_info *mtd, struct nand_chip *chip);
void aml_nand_erase_cmd(struct mtd_info *mtd, int page);
int aml_nand_erase_cmd(struct mtd_info *mtd, int page);
int add_mtd_partitions(struct mtd_info *mtd,
const struct mtd_partition *part, int num);

7
drivers/amlogic/mtd/aml_nand.c
View File

@@ -1109,7 +1109,7 @@ void aml_nand_command(struct mtd_info *mtd,
}
void aml_nand_erase_cmd(struct mtd_info *mtd, int page)
int aml_nand_erase_cmd(struct mtd_info *mtd, int page)
{
struct aml_nand_chip *aml_chip = mtd_to_nand_chip(mtd);
struct nand_chip *chip = mtd->priv;
@@ -1123,7 +1123,7 @@ void aml_nand_erase_cmd(struct mtd_info *mtd, int page)
vt_page_num = (mtd->writesize / (1 << chip->page_shift));
vt_page_num *= (1 << pages_per_blk_shift);
if (page % vt_page_num)
return;
return 0;
/* Send commands to erase a block */
valid_page_num = (mtd->writesize >> chip->page_shift);
@@ -1131,7 +1131,7 @@ void aml_nand_erase_cmd(struct mtd_info *mtd, int page)
block_addr = ((page / valid_page_num) >> pages_per_blk_shift);
if (aml_nand_rsv_erase_protect(mtd, block_addr) == -1)
return;
return -EPERM;
valid_page_num /= aml_chip->plane_num;
@@ -1166,6 +1166,7 @@ void aml_nand_erase_cmd(struct mtd_info *mtd, int page)
}
}
}
return 0;
}
void aml_nand_dma_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)

2
drivers/amlogic/mtd/nand_flash.c
View File

@@ -1285,7 +1285,7 @@ static int aml_nand_scan_ident(struct mtd_info *mtd, int maxchips)
chip->cmdfunc = aml_nand_command;
chip->waitfunc = aml_nand_wait;
/*chip->erase_cmd = aml_nand_erase_cmd;*/
chip->erase = aml_nand_erase_cmd;
chip->write_page = aml_nand_write_page;
return 0;