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mtd: introduce mtd_read_oob interface 

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Artem Bityutskiy 2011-12-23 18:27:05 +02:00 committed by David Woodhouse
parent 7ae79d7ff1
commit fd2819bbc9
14 changed files with 37 additions and 31 deletions
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2
drivers/mtd/inftlcore.c
View File

@ -158,7 +158,7 @@ int inftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len,
ops.oobbuf = buf;
ops.datbuf = NULL;
res = mtd->read_oob(mtd, offs & ~(mtd->writesize - 1), &ops);
res = mtd_read_oob(mtd, offs & ~(mtd->writesize - 1), &ops);
*retlen = ops.oobretlen;
return res;
}

4
drivers/mtd/mtdchar.c
View File

@ -227,7 +227,7 @@ static ssize_t mtdchar_read(struct file *file, char __user *buf, size_t count,
ops.oobbuf = NULL;
ops.len = len;
ret = mtd->read_oob(mtd, *ppos, &ops);
ret = mtd_read_oob(mtd, *ppos, &ops);
retlen = ops.retlen;
break;
}
@ -471,7 +471,7 @@ static int mtdchar_readoob(struct file *file, struct mtd_info *mtd,
return -ENOMEM;
start &= ~((uint64_t)mtd->writesize - 1);
ret = mtd->read_oob(mtd, start, &ops);
ret = mtd_read_oob(mtd, start, &ops);
if (put_user(ops.oobretlen, retp))
ret = -EFAULT;

2
drivers/mtd/mtdconcat.c
View File

@ -273,7 +273,7 @@ concat_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops)
if (from + devops.len > subdev->size)
devops.len = subdev->size - from;
err = subdev->read_oob(subdev, from, &devops);
err = mtd_read_oob(subdev, from, &devops);
ops->retlen += devops.retlen;
ops->oobretlen += devops.oobretlen;

2
drivers/mtd/mtdpart.c
View File

@ -138,7 +138,7 @@ static int part_read_oob(struct mtd_info *mtd, loff_t from,
return -EINVAL;
}
res = part->master->read_oob(part->master, from + part->offset, ops);
res = mtd_read_oob(part->master, from + part->offset, ops);
if (unlikely(res)) {
if (mtd_is_bitflip(res))
mtd->ecc_stats.corrected++;

4
drivers/mtd/mtdswap.c
View File

@ -312,7 +312,7 @@ static int mtdswap_handle_write_error(struct mtdswap_dev *d, struct swap_eb *eb)
static int mtdswap_read_oob(struct mtdswap_dev *d, loff_t from,
struct mtd_oob_ops *ops)
{
int ret = d->mtd->read_oob(d->mtd, from, ops);
int ret = mtd_read_oob(d->mtd, from, ops);
if (mtd_is_bitflip(ret))
return ret;
@ -955,7 +955,7 @@ static unsigned int mtdswap_eblk_passes(struct mtdswap_dev *d,
pos = base;
for (i = 0; i < mtd_pages; i++) {
ret = mtd->read_oob(mtd, pos, &ops);
ret = mtd_read_oob(mtd, pos, &ops);
if (ret)
goto error;

6
drivers/mtd/nand/nand_bbt.c
View File

@ -317,7 +317,7 @@ static int scan_read_raw_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
ops.len = min(len, (size_t)mtd->writesize);
ops.oobbuf = buf + ops.len;
res = mtd->read_oob(mtd, offs, &ops);
res = mtd_read_oob(mtd, offs, &ops);
if (res)
return res;
@ -434,7 +434,7 @@ static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd,
* Read the full oob until read_oob is fixed to handle single
* byte reads for 16 bit buswidth.
*/
ret = mtd->read_oob(mtd, offs, &ops);
ret = mtd_read_oob(mtd, offs, &ops);
/* Ignore ECC errors when checking for BBM */
if (ret && !mtd_is_bitflip_or_eccerr(ret))
return ret;
@ -769,7 +769,7 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
/* Read oob data */
ops.ooblen = (len >> this->page_shift) * mtd->oobsize;
ops.oobbuf = &buf[len];
res = mtd->read_oob(mtd, to + mtd->writesize, &ops);
res = mtd_read_oob(mtd, to + mtd->writesize, &ops);
if (res < 0 || ops.oobretlen != ops.ooblen)
goto outerr;

2
drivers/mtd/nftlcore.c
View File

@ -153,7 +153,7 @@ int nftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len,
ops.oobbuf = buf;
ops.datbuf = NULL;
res = mtd->read_oob(mtd, offs & ~mask, &ops);
res = mtd_read_oob(mtd, offs & ~mask, &ops);
*retlen = ops.oobretlen;
return res;
}

2
drivers/mtd/sm_ftl.c
View File

@ -278,7 +278,7 @@ again:
/* Unfortunately, oob read will _always_ succeed,
despite card removal..... */
ret = mtd->read_oob(mtd, sm_mkoffset(ftl, zone, block, boffset), &ops);
ret = mtd_read_oob(mtd, sm_mkoffset(ftl, zone, block, boffset), &ops);
/* Test for unknown errors */
if (ret != 0 && !mtd_is_bitflip_or_eccerr(ret)) {

2
drivers/mtd/ssfdc.c
View File

@ -175,7 +175,7 @@ static int read_raw_oob(struct mtd_info *mtd, loff_t offs, uint8_t *buf)
ops.oobbuf = buf;
ops.datbuf = NULL;
ret = mtd->read_oob(mtd, offs, &ops);
ret = mtd_read_oob(mtd, offs, &ops);
if (ret < 0 || ops.oobretlen != OOB_SIZE)
return -1;

14
drivers/mtd/tests/mtd_oobtest.c
View File

@ -192,7 +192,7 @@ static int verify_eraseblock(int ebnum)
ops.ooboffs = use_offset;
ops.datbuf = NULL;
ops.oobbuf = readbuf;
err = mtd->read_oob(mtd, addr, &ops);
err = mtd_read_oob(mtd, addr, &ops);
if (err || ops.oobretlen != use_len) {
printk(PRINT_PREF "error: readoob failed at %#llx\n",
(long long)addr);
@ -219,7 +219,7 @@ static int verify_eraseblock(int ebnum)
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.oobbuf = readbuf;
err = mtd->read_oob(mtd, addr, &ops);
err = mtd_read_oob(mtd, addr, &ops);
if (err || ops.oobretlen != mtd->ecclayout->oobavail) {
printk(PRINT_PREF "error: readoob failed at "
"%#llx\n", (long long)addr);
@ -284,7 +284,7 @@ static int verify_eraseblock_in_one_go(int ebnum)
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.oobbuf = readbuf;
err = mtd->read_oob(mtd, addr, &ops);
err = mtd_read_oob(mtd, addr, &ops);
if (err || ops.oobretlen != len) {
printk(PRINT_PREF "error: readoob failed at %#llx\n",
(long long)addr);
@ -544,7 +544,7 @@ static int __init mtd_oobtest_init(void)
ops.oobbuf = readbuf;
printk(PRINT_PREF "attempting to start read past end of OOB\n");
printk(PRINT_PREF "an error is expected...\n");
err = mtd->read_oob(mtd, addr0, &ops);
err = mtd_read_oob(mtd, addr0, &ops);
if (err) {
printk(PRINT_PREF "error occurred as expected\n");
err = 0;
@ -588,7 +588,7 @@ static int __init mtd_oobtest_init(void)
ops.oobbuf = readbuf;
printk(PRINT_PREF "attempting to read past end of device\n");
printk(PRINT_PREF "an error is expected...\n");
err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops);
err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);
if (err) {
printk(PRINT_PREF "error occurred as expected\n");
err = 0;
@ -632,7 +632,7 @@ static int __init mtd_oobtest_init(void)
ops.oobbuf = readbuf;
printk(PRINT_PREF "attempting to read past end of device\n");
printk(PRINT_PREF "an error is expected...\n");
err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops);
err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);
if (err) {
printk(PRINT_PREF "error occurred as expected\n");
err = 0;
@ -698,7 +698,7 @@ static int __init mtd_oobtest_init(void)
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.oobbuf = readbuf;
err = mtd->read_oob(mtd, addr, &ops);
err = mtd_read_oob(mtd, addr, &ops);
if (err)
goto out;
if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) {

2
drivers/mtd/tests/mtd_readtest.c
View File

@ -74,7 +74,7 @@ static int read_eraseblock_by_page(int ebnum)
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.oobbuf = oobbuf;
ret = mtd->read_oob(mtd, addr, &ops);
ret = mtd_read_oob(mtd, addr, &ops);
if ((ret && !mtd_is_bitflip(ret)) ||
ops.oobretlen != mtd->oobsize) {
printk(PRINT_PREF "error: read oob failed at "

12
drivers/staging/spectra/lld_mtd.c
View File

@ -351,9 +351,9 @@ u16 mtd_Read_Page_Main_Spare(u8 *read_data, u32 Block,
ops.ooblen = BTSIG_BYTES;
ops.ooboffs = 0;
ret = spectra_mtd->read_oob(spectra_mtd,
(Block * spectra_mtd->erasesize) + (Page * spectra_mtd->writesize),
&ops);
ret = mtd_read_oob(spectra_mtd,
(Block * spectra_mtd->erasesize) + (Page * spectra_mtd->writesize),
&ops);
if (ret) {
printk(KERN_ERR "%s failed %d\n", __func__, ret);
return FAIL;
@ -484,9 +484,9 @@ u16 mtd_Read_Page_Spare(u8 *read_data, u32 Block,
ops.ooblen = BTSIG_BYTES;
ops.ooboffs = 0;
ret = spectra_mtd->read_oob(spectra_mtd,
(Block * spectra_mtd->erasesize) + (Page * spectra_mtd->writesize),
&ops);
ret = mtd_read_oob(spectra_mtd,
(Block * spectra_mtd->erasesize) + (Page * spectra_mtd->writesize),
&ops);
if (ret) {
printk(KERN_ERR "%s failed %d\n", __func__, ret);
return FAIL;

4
fs/jffs2/wbuf.c
View File

@ -1032,7 +1032,7 @@ int jffs2_check_oob_empty(struct jffs2_sb_info *c,
ops.len = ops.ooboffs = ops.retlen = ops.oobretlen = 0;
ops.datbuf = NULL;
ret = c->mtd->read_oob(c->mtd, jeb->offset, &ops);
ret = mtd_read_oob(c->mtd, jeb->offset, &ops);
if (ret || ops.oobretlen != ops.ooblen) {
printk(KERN_ERR "cannot read OOB for EB at %08x, requested %zd"
" bytes, read %zd bytes, error %d\n",
@ -1075,7 +1075,7 @@ int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c,
ops.len = ops.ooboffs = ops.retlen = ops.oobretlen = 0;
ops.datbuf = NULL;
ret = c->mtd->read_oob(c->mtd, jeb->offset, &ops);
ret = mtd_read_oob(c->mtd, jeb->offset, &ops);
if (ret || ops.oobretlen != ops.ooblen) {
printk(KERN_ERR "cannot read OOB for EB at %08x, requested %zd"
" bytes, read %zd bytes, error %d\n",

10
include/linux/mtd/mtd.h
View File

@ -188,6 +188,8 @@ struct mtd_info {
size_t *retlen, const u_char *buf);
int (*panic_write) (struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf);
int (*read_oob) (struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops);
/* Backing device capabilities for this device
* - provides mmap capabilities
@ -195,8 +197,6 @@ struct mtd_info {
struct backing_dev_info *backing_dev_info;
int (*read_oob) (struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops);
int (*write_oob) (struct mtd_info *mtd, loff_t to,
struct mtd_oob_ops *ops);
@ -320,6 +320,12 @@ static inline int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len,
return mtd->panic_write(mtd, to, len, retlen, buf);
}
static inline int mtd_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
return mtd->read_oob(mtd, from, ops);
}
static inline struct mtd_info *dev_to_mtd(struct device *dev)
{
return dev ? dev_get_drvdata(dev) : NULL;