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authorHuang Shijie <shijie8@gmail.com>2012-08-15 04:38:45 +0200
committerDavid Woodhouse <David.Woodhouse@intel.com>2012-09-29 16:00:46 +0200
commit657f28f8811c92724db10d18bbbec70d540147d6 (patch)
tree1d8cb32d57eec27f46a74cad73a1ceff43f5e099 /drivers/mtd/nand/r852.c
parentmtd: m25p80: add support for Micron N25Q256A (diff)
downloadlinux-657f28f8811c92724db10d18bbbec70d540147d6.tar.xz
linux-657f28f8811c92724db10d18bbbec70d540147d6.zip
mtd: kill MTD_NAND_VERIFY_WRITE
Just as Artem suggested: "Both UBI and JFFS2 are able to read verify what they wrote already. There are also MTD tests which do this verification. So I think there is no reason to keep this in the NAND layer, let alone wasting RAM in the driver to support this feature. Besides, it does not work for sub-pages and many drivers have it broken. It hurts more than it provides benefits." So kill MTD_NAND_VERIFY_WRITE entirely. Signed-off-by: Huang Shijie <shijie8@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/nand/r852.c')
-rw-r--r--drivers/mtd/nand/r852.c22
1 files changed, 0 insertions, 22 deletions
diff --git a/drivers/mtd/nand/r852.c b/drivers/mtd/nand/r852.c
index 8cb627751c9c..4495f8551fa0 100644
--- a/drivers/mtd/nand/r852.c
+++ b/drivers/mtd/nand/r852.c
@@ -309,27 +309,6 @@ static uint8_t r852_read_byte(struct mtd_info *mtd)
return r852_read_reg(dev, R852_DATALINE);
}
-
-/*
- * Readback the buffer to verify it
- */
-int r852_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
-{
- struct r852_device *dev = r852_get_dev(mtd);
-
- /* We can't be sure about anything here... */
- if (dev->card_unstable)
- return -1;
-
- /* This will never happen, unless you wired up a nand chip
- with > 512 bytes page size to the reader */
- if (len > SM_SECTOR_SIZE)
- return 0;
-
- r852_read_buf(mtd, dev->tmp_buffer, len);
- return memcmp(buf, dev->tmp_buffer, len);
-}
-
/*
* Control several chip lines & send commands
*/
@@ -882,7 +861,6 @@ int r852_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
chip->read_byte = r852_read_byte;
chip->read_buf = r852_read_buf;
chip->write_buf = r852_write_buf;
- chip->verify_buf = r852_verify_buf;
/* ecc */
chip->ecc.mode = NAND_ECC_HW_SYNDROME;