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mtd: introduce mtd_write interface

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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 17:35:41 +02:00 committed by David Woodhouse
parent 329ad399a9
commit eda95cbf75
22 changed files with 84 additions and 73 deletions
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8
drivers/mtd/chips/cfi_cmdset_0020.c
View File

@ -699,7 +699,8 @@ cfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs,
continue;
}
memcpy(buffer+buflen, elem_base, ECCBUF_SIZE-buflen);
ret = mtd->write(mtd, to, ECCBUF_SIZE, &thislen, buffer);
ret = mtd_write(mtd, to, ECCBUF_SIZE, &thislen,
buffer);
totlen += thislen;
if (ret || thislen != ECCBUF_SIZE)
goto write_error;
@ -708,7 +709,8 @@ cfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs,
to += ECCBUF_SIZE;
}
if (ECCBUF_DIV(elem_len)) { /* write clean aligned data */
ret = mtd->write(mtd, to, ECCBUF_DIV(elem_len), &thislen, elem_base);
ret = mtd_write(mtd, to, ECCBUF_DIV(elem_len),
&thislen, elem_base);
totlen += thislen;
if (ret || thislen != ECCBUF_DIV(elem_len))
goto write_error;
@ -722,7 +724,7 @@ cfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs,
}
if (buflen) { /* flush last page, even if not full */
/* This is sometimes intended behaviour, really */
ret = mtd->write(mtd, to, buflen, &thislen, buffer);
ret = mtd_write(mtd, to, buflen, &thislen, buffer);
totlen += thislen;
if (ret || thislen != ECCBUF_SIZE)
goto write_error;

35
drivers/mtd/ftl.c
View File

@ -422,8 +422,8 @@ static int prepare_xfer(partition_t *part, int i)
header.LogicalEUN = cpu_to_le16(0xffff);
header.EraseCount = cpu_to_le32(xfer->EraseCount);
ret = part->mbd.mtd->write(part->mbd.mtd, xfer->Offset, sizeof(header),
&retlen, (u_char *)&header);
ret = mtd_write(part->mbd.mtd, xfer->Offset, sizeof(header), &retlen,
(u_char *)&header);
if (ret) {
return ret;
@ -438,8 +438,8 @@ static int prepare_xfer(partition_t *part, int i)
for (i = 0; i < nbam; i++, offset += sizeof(uint32_t)) {
ret = part->mbd.mtd->write(part->mbd.mtd, offset, sizeof(uint32_t),
&retlen, (u_char *)&ctl);
ret = mtd_write(part->mbd.mtd, offset, sizeof(uint32_t), &retlen,
(u_char *)&ctl);
if (ret)
return ret;
@ -503,8 +503,8 @@ static int copy_erase_unit(partition_t *part, uint16_t srcunit,
offset = xfer->Offset + 20; /* Bad! */
unit = cpu_to_le16(0x7fff);
ret = part->mbd.mtd->write(part->mbd.mtd, offset, sizeof(uint16_t),
&retlen, (u_char *) &unit);
ret = mtd_write(part->mbd.mtd, offset, sizeof(uint16_t), &retlen,
(u_char *)&unit);
if (ret) {
printk( KERN_WARNING "ftl: Failed to write back to BAM cache in copy_erase_unit()!\n");
@ -531,8 +531,8 @@ static int copy_erase_unit(partition_t *part, uint16_t srcunit,
}
ret = part->mbd.mtd->write(part->mbd.mtd, dest, SECTOR_SIZE,
&retlen, (u_char *) buf);
ret = mtd_write(part->mbd.mtd, dest, SECTOR_SIZE, &retlen,
(u_char *)buf);
if (ret) {
printk(KERN_WARNING "ftl: Error writing new xfer unit in copy_erase_unit\n");
return ret;
@ -550,9 +550,11 @@ static int copy_erase_unit(partition_t *part, uint16_t srcunit,
}
/* Write the BAM to the transfer unit */
ret = part->mbd.mtd->write(part->mbd.mtd, xfer->Offset + le32_to_cpu(part->header.BAMOffset),
part->BlocksPerUnit * sizeof(int32_t), &retlen,
(u_char *)part->bam_cache);
ret = mtd_write(part->mbd.mtd,
xfer->Offset + le32_to_cpu(part->header.BAMOffset),
part->BlocksPerUnit * sizeof(int32_t),
&retlen,
(u_char *)part->bam_cache);
if (ret) {
printk( KERN_WARNING "ftl: Error writing BAM in copy_erase_unit\n");
return ret;
@ -560,8 +562,8 @@ static int copy_erase_unit(partition_t *part, uint16_t srcunit,
/* All clear? Then update the LogicalEUN again */
ret = part->mbd.mtd->write(part->mbd.mtd, xfer->Offset + 20, sizeof(uint16_t),
&retlen, (u_char *)&srcunitswap);
ret = mtd_write(part->mbd.mtd, xfer->Offset + 20, sizeof(uint16_t),
&retlen, (u_char *)&srcunitswap);
if (ret) {
printk(KERN_WARNING "ftl: Error writing new LogicalEUN in copy_erase_unit\n");
@ -887,8 +889,8 @@ static int set_bam_entry(partition_t *part, uint32_t log_addr,
#endif
part->bam_cache[blk] = le_virt_addr;
}
ret = part->mbd.mtd->write(part->mbd.mtd, offset, sizeof(uint32_t),
&retlen, (u_char *)&le_virt_addr);
ret = mtd_write(part->mbd.mtd, offset, sizeof(uint32_t), &retlen,
(u_char *)&le_virt_addr);
if (ret) {
printk(KERN_NOTICE "ftl_cs: set_bam_entry() failed!\n");
@ -947,8 +949,7 @@ static int ftl_write(partition_t *part, caddr_t buffer,
part->EUNInfo[part->bam_index].Deleted++;
offset = (part->EUNInfo[part->bam_index].Offset +
blk * SECTOR_SIZE);
ret = part->mbd.mtd->write(part->mbd.mtd, offset, SECTOR_SIZE, &retlen,
buffer);
ret = mtd_write(part->mbd.mtd, offset, SECTOR_SIZE, &retlen, buffer);
if (ret) {
printk(KERN_NOTICE "ftl_cs: block write failed!\n");

4
drivers/mtd/mtdblock.c
View File

@ -102,7 +102,7 @@ static int erase_write (struct mtd_info *mtd, unsigned long pos,
* Next, write the data to flash.
*/
ret = mtd->write(mtd, pos, len, &retlen, buf);
ret = mtd_write(mtd, pos, len, &retlen, buf);
if (ret)
return ret;
if (retlen != len)
@ -152,7 +152,7 @@ static int do_cached_write (struct mtdblk_dev *mtdblk, unsigned long pos,
mtd->name, pos, len);
if (!sect_size)
return mtd->write(mtd, pos, len, &retlen, buf);
return mtd_write(mtd, pos, len, &retlen, buf);
while (len > 0) {
unsigned long sect_start = (pos/sect_size)*sect_size;

2
drivers/mtd/mtdblock_ro.c
View File

@ -40,7 +40,7 @@ static int mtdblock_writesect(struct mtd_blktrans_dev *dev,
{
size_t retlen;
if (dev->mtd->write(dev->mtd, (block * 512), 512, &retlen, buf))
if (mtd_write(dev->mtd, (block * 512), 512, &retlen, buf))
return 1;
return 0;
}

2
drivers/mtd/mtdchar.c
View File

@ -331,7 +331,7 @@ static ssize_t mtdchar_write(struct file *file, const char __user *buf, size_t c
}
default:
ret = (*(mtd->write))(mtd, *ppos, len, &retlen, kbuf);
ret = mtd_write(mtd, *ppos, len, &retlen, kbuf);
}
if (!ret) {
*ppos += retlen;

2
drivers/mtd/mtdconcat.c
View File

@ -148,7 +148,7 @@ concat_write(struct mtd_info *mtd, loff_t to, size_t len,
if (!(subdev->flags & MTD_WRITEABLE))
err = -EROFS;
else
err = subdev->write(subdev, to, size, &retsize, buf);
err = mtd_write(subdev, to, size, &retsize, buf);
if (err)
break;

3
drivers/mtd/mtdcore.c
View File

@ -699,7 +699,8 @@ int default_mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
for (i=0; i<count; i++) {
if (!vecs[i].iov_len)
continue;
ret = mtd->write(mtd, to, vecs[i].iov_len, &thislen, vecs[i].iov_base);
ret = mtd_write(mtd, to, vecs[i].iov_len, &thislen,
vecs[i].iov_base);
totlen += thislen;
if (ret || thislen != vecs[i].iov_len)
break;

4
drivers/mtd/mtdoops.c
View File

@ -225,8 +225,8 @@ static void mtdoops_write(struct mtdoops_context *cxt, int panic)
ret = mtd->panic_write(mtd, cxt->nextpage * record_size,
record_size, &retlen, cxt->oops_buf);
else
ret = mtd->write(mtd, cxt->nextpage * record_size,
record_size, &retlen, cxt->oops_buf);
ret = mtd_write(mtd, cxt->nextpage * record_size,
record_size, &retlen, cxt->oops_buf);
if (retlen != record_size || ret < 0)
printk(KERN_ERR "mtdoops: write failure at %ld (%td of %ld written), error %d\n",

3
drivers/mtd/mtdpart.c
View File

@ -188,8 +188,7 @@ static int part_write(struct mtd_info *mtd, loff_t to, size_t len,
len = 0;
else if (to + len > mtd->size)
len = mtd->size - to;
return part->master->write(part->master, to + part->offset,
len, retlen, buf);
return mtd_write(part->master, to + part->offset, len, retlen, buf);
}
static int part_panic_write(struct mtd_info *mtd, loff_t to, size_t len,

2
drivers/mtd/mtdswap.c
View File

@ -689,7 +689,7 @@ retry:
return ret;
writepos = (loff_t)*bp << PAGE_SHIFT;
ret = mtd->write(mtd, writepos, PAGE_SIZE, &retlen, buf);
ret = mtd_write(mtd, writepos, PAGE_SIZE, &retlen, buf);
if (ret == -EIO || mtd_is_eccerr(ret)) {
d->curr_write_pos--;
eb->active_count--;

17
drivers/mtd/rfd_ftl.c
View File

@ -304,9 +304,8 @@ static void erase_callback(struct erase_info *erase)
part->blocks[i].used_sectors = 0;
part->blocks[i].erases++;
rc = part->mbd.mtd->write(part->mbd.mtd,
part->blocks[i].offset, sizeof(magic), &retlen,
(u_char*)&magic);
rc = mtd_write(part->mbd.mtd, part->blocks[i].offset, sizeof(magic),
&retlen, (u_char *)&magic);
if (!rc && retlen != sizeof(magic))
rc = -EIO;
@ -595,8 +594,8 @@ static int mark_sector_deleted(struct partition *part, u_long old_addr)
addr = part->blocks[block].offset +
(HEADER_MAP_OFFSET + offset) * sizeof(u16);
rc = part->mbd.mtd->write(part->mbd.mtd, addr,
sizeof(del), &retlen, (u_char*)&del);
rc = mtd_write(part->mbd.mtd, addr, sizeof(del), &retlen,
(u_char *)&del);
if (!rc && retlen != sizeof(del))
rc = -EIO;
@ -668,8 +667,8 @@ static int do_writesect(struct mtd_blktrans_dev *dev, u_long sector, char *buf,
addr = (i + part->header_sectors_per_block) * SECTOR_SIZE +
block->offset;
rc = part->mbd.mtd->write(part->mbd.mtd,
addr, SECTOR_SIZE, &retlen, (u_char*)buf);
rc = mtd_write(part->mbd.mtd, addr, SECTOR_SIZE, &retlen,
(u_char *)buf);
if (!rc && retlen != SECTOR_SIZE)
rc = -EIO;
@ -688,8 +687,8 @@ static int do_writesect(struct mtd_blktrans_dev *dev, u_long sector, char *buf,
part->header_cache[i + HEADER_MAP_OFFSET] = entry;
addr = block->offset + (HEADER_MAP_OFFSET + i) * sizeof(u16);
rc = part->mbd.mtd->write(part->mbd.mtd, addr,
sizeof(entry), &retlen, (u_char*)&entry);
rc = mtd_write(part->mbd.mtd, addr, sizeof(entry), &retlen,
(u_char *)&entry);
if (!rc && retlen != sizeof(entry))
rc = -EIO;

8
drivers/mtd/tests/mtd_pagetest.c
View File

@ -100,7 +100,7 @@ static int write_eraseblock(int ebnum)
set_random_data(writebuf, mtd->erasesize);
cond_resched();
err = mtd->write(mtd, addr, mtd->erasesize, &written, writebuf);
err = mtd_write(mtd, addr, mtd->erasesize, &written, writebuf);
if (err || written != mtd->erasesize)
printk(PRINT_PREF "error: write failed at %#llx\n",
(long long)addr);
@ -335,7 +335,7 @@ static int erasecrosstest(void)
printk(PRINT_PREF "writing 1st page of block %d\n", ebnum);
set_random_data(writebuf, pgsize);
strcpy(writebuf, "There is no data like this!");
err = mtd->write(mtd, addr0, pgsize, &written, writebuf);
err = mtd_write(mtd, addr0, pgsize, &written, writebuf);
if (err || written != pgsize) {
printk(PRINT_PREF "error: write failed at %#llx\n",
(long long)addr0);
@ -368,7 +368,7 @@ static int erasecrosstest(void)
printk(PRINT_PREF "writing 1st page of block %d\n", ebnum);
set_random_data(writebuf, pgsize);
strcpy(writebuf, "There is no data like this!");
err = mtd->write(mtd, addr0, pgsize, &written, writebuf);
err = mtd_write(mtd, addr0, pgsize, &written, writebuf);
if (err || written != pgsize) {
printk(PRINT_PREF "error: write failed at %#llx\n",
(long long)addr0);
@ -425,7 +425,7 @@ static int erasetest(void)
printk(PRINT_PREF "writing 1st page of block %d\n", ebnum);
set_random_data(writebuf, pgsize);
err = mtd->write(mtd, addr0, pgsize, &written, writebuf);
err = mtd_write(mtd, addr0, pgsize, &written, writebuf);
if (err || written != pgsize) {
printk(PRINT_PREF "error: write failed at %#llx\n",
(long long)addr0);

8
drivers/mtd/tests/mtd_speedtest.c
View File

@ -143,7 +143,7 @@ static int write_eraseblock(int ebnum)
int err = 0;
loff_t addr = ebnum * mtd->erasesize;
err = mtd->write(mtd, addr, mtd->erasesize, &written, iobuf);
err = mtd_write(mtd, addr, mtd->erasesize, &written, iobuf);
if (err || written != mtd->erasesize) {
printk(PRINT_PREF "error: write failed at %#llx\n", addr);
if (!err)
@ -161,7 +161,7 @@ static int write_eraseblock_by_page(int ebnum)
void *buf = iobuf;
for (i = 0; i < pgcnt; i++) {
err = mtd->write(mtd, addr, pgsize, &written, buf);
err = mtd_write(mtd, addr, pgsize, &written, buf);
if (err || written != pgsize) {
printk(PRINT_PREF "error: write failed at %#llx\n",
addr);
@ -184,7 +184,7 @@ static int write_eraseblock_by_2pages(int ebnum)
void *buf = iobuf;
for (i = 0; i < n; i++) {
err = mtd->write(mtd, addr, sz, &written, buf);
err = mtd_write(mtd, addr, sz, &written, buf);
if (err || written != sz) {
printk(PRINT_PREF "error: write failed at %#llx\n",
addr);
@ -196,7 +196,7 @@ static int write_eraseblock_by_2pages(int ebnum)
buf += sz;
}
if (pgcnt % 2) {
err = mtd->write(mtd, addr, pgsize, &written, buf);
err = mtd_write(mtd, addr, pgsize, &written, buf);
if (err || written != pgsize) {
printk(PRINT_PREF "error: write failed at %#llx\n",
addr);

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

@ -192,7 +192,7 @@ static int do_write(void)
}
}
addr = eb * mtd->erasesize + offs;
err = mtd->write(mtd, addr, len, &written, writebuf);
err = mtd_write(mtd, addr, len, &written, writebuf);
if (unlikely(err || written != len)) {
printk(PRINT_PREF "error: write failed at 0x%llx\n",
(long long)addr);

6
drivers/mtd/tests/mtd_subpagetest.c
View File

@ -120,7 +120,7 @@ static int write_eraseblock(int ebnum)
loff_t addr = ebnum * mtd->erasesize;
set_random_data(writebuf, subpgsize);
err = mtd->write(mtd, addr, subpgsize, &written, writebuf);
err = mtd_write(mtd, addr, subpgsize, &written, writebuf);
if (unlikely(err || written != subpgsize)) {
printk(PRINT_PREF "error: write failed at %#llx\n",
(long long)addr);
@ -134,7 +134,7 @@ static int write_eraseblock(int ebnum)
addr += subpgsize;
set_random_data(writebuf, subpgsize);
err = mtd->write(mtd, addr, subpgsize, &written, writebuf);
err = mtd_write(mtd, addr, subpgsize, &written, writebuf);
if (unlikely(err || written != subpgsize)) {
printk(PRINT_PREF "error: write failed at %#llx\n",
(long long)addr);
@ -158,7 +158,7 @@ static int write_eraseblock2(int ebnum)
if (addr + (subpgsize * k) > (ebnum + 1) * mtd->erasesize)
break;
set_random_data(writebuf, subpgsize * k);
err = mtd->write(mtd, addr, subpgsize * k, &written, writebuf);
err = mtd_write(mtd, addr, subpgsize * k, &written, writebuf);
if (unlikely(err || written != subpgsize * k)) {
printk(PRINT_PREF "error: write failed at %#llx\n",
(long long)addr);

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

@ -189,7 +189,7 @@ static inline int write_pattern(int ebnum, void *buf)
addr = (ebnum + 1) * mtd->erasesize - pgcnt * pgsize;
len = pgcnt * pgsize;
}
err = mtd->write(mtd, addr, len, &written, buf);
err = mtd_write(mtd, addr, len, &written, buf);
if (err) {
printk(PRINT_PREF "error %d while writing EB %d, written %zd"
" bytes\n", err, ebnum, written);

7
drivers/mtd/ubi/io.c
View File

@ -289,7 +289,7 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
}
addr = (loff_t)pnum * ubi->peb_size + offset;
err = ubi->mtd->write(ubi->mtd, addr, len, &written, buf);
err = mtd_write(ubi->mtd, addr, len, &written, buf);
if (err) {
ubi_err("error %d while writing %d bytes to PEB %d:%d, written "
"%zd bytes", err, len, pnum, offset, written);
@ -525,11 +525,10 @@ static int nor_erase_prepare(struct ubi_device *ubi, int pnum)
* the header comment in scan.c for more information).
*/
addr = (loff_t)pnum * ubi->peb_size;
err = ubi->mtd->write(ubi->mtd, addr, 4, &written, (void *)&data);
err = mtd_write(ubi->mtd, addr, 4, &written, (void *)&data);
if (!err) {
addr += ubi->vid_hdr_aloffset;
err = ubi->mtd->write(ubi->mtd, addr, 4, &written,
(void *)&data);
err = mtd_write(ubi->mtd, addr, 4, &written, (void *)&data);
if (!err)
return 0;
}

8
drivers/staging/spectra/lld_mtd.c
View File

@ -233,9 +233,11 @@ u16 mtd_Write_Page_Main(u8 *write_data, u32 Block,
while (PageCount) {
ret = spectra_mtd->write(spectra_mtd,
(Block * spectra_mtd->erasesize) + (Page * spectra_mtd->writesize),
DeviceInfo.wPageDataSize, &retlen, write_data);
ret = mtd_write(spectra_mtd,
(Block * spectra_mtd->erasesize) + (Page * spectra_mtd->writesize),
DeviceInfo.wPageDataSize,
&retlen,
write_data);
if (ret) {
printk(KERN_ERR "%s failed %d\n", __func__, ret);
return FAIL;

18
fs/jffs2/wbuf.c
View File

@ -414,13 +414,12 @@ static void jffs2_wbuf_recover(struct jffs2_sb_info *c)
if (breakme++ == 20) {
printk(KERN_NOTICE "Faking write error at 0x%08x\n", ofs);
breakme = 0;
c->mtd->write(c->mtd, ofs, towrite, &retlen,
brokenbuf);
mtd_write(c->mtd, ofs, towrite, &retlen, brokenbuf);
ret = -EIO;
} else
#endif
ret = c->mtd->write(c->mtd, ofs, towrite, &retlen,
rewrite_buf);
ret = mtd_write(c->mtd, ofs, towrite, &retlen,
rewrite_buf);
if (ret || retlen != towrite || jffs2_verify_write(c, rewrite_buf, ofs)) {
/* Argh. We tried. Really we did. */
@ -620,13 +619,14 @@ static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad)
if (breakme++ == 20) {
printk(KERN_NOTICE "Faking write error at 0x%08x\n", c->wbuf_ofs);
breakme = 0;
c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen,
brokenbuf);
mtd_write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen,
brokenbuf);
ret = -EIO;
} else
#endif
ret = c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf);
ret = mtd_write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize,
&retlen, c->wbuf);
if (ret) {
printk(KERN_WARNING "jffs2_flush_wbuf(): Write failed with %d\n", ret);
@ -862,8 +862,8 @@ int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs,
v += wbuf_retlen;
if (vlen >= c->wbuf_pagesize) {
ret = c->mtd->write(c->mtd, outvec_to, PAGE_DIV(vlen),
&wbuf_retlen, v);
ret = mtd_write(c->mtd, outvec_to, PAGE_DIV(vlen),
&wbuf_retlen, v);
if (ret < 0 || wbuf_retlen != PAGE_DIV(vlen))
goto outfile;

5
fs/jffs2/writev.c
View File

@ -26,7 +26,8 @@ static inline int mtd_fake_writev(struct mtd_info *mtd, const struct kvec *vecs,
for (i=0; i<count; i++) {
if (!vecs[i].iov_len)
continue;
ret = mtd->write(mtd, to, vecs[i].iov_len, &thislen, vecs[i].iov_base);
ret = mtd_write(mtd, to, vecs[i].iov_len, &thislen,
vecs[i].iov_base);
totlen += thislen;
if (ret || thislen != vecs[i].iov_len)
break;
@ -61,7 +62,7 @@ int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
size_t *retlen, const u_char *buf)
{
int ret;
ret = c->mtd->write(c->mtd, ofs, len, retlen, buf);
ret = mtd_write(c->mtd, ofs, len, retlen, buf);
if (jffs2_sum_active()) {
struct kvec vecs[1];

2
fs/logfs/dev_mtd.c
View File

@ -49,7 +49,7 @@ static int loffs_mtd_write(struct super_block *sb, loff_t ofs, size_t len,
BUG_ON(len > PAGE_CACHE_SIZE);
page_start = ofs & PAGE_CACHE_MASK;
page_end = PAGE_CACHE_ALIGN(ofs + len) - 1;
ret = mtd->write(mtd, ofs, len, &retlen, buf);
ret = mtd_write(mtd, ofs, len, &retlen, buf);
if (ret || (retlen != len))
return -EIO;

9
include/linux/mtd/mtd.h
View File

@ -184,6 +184,8 @@ struct mtd_info {
unsigned long flags);
int (*read) (struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf);
int (*write) (struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf);
/* Backing device capabilities for this device
* - provides mmap capabilities
@ -191,7 +193,6 @@ struct mtd_info {
struct backing_dev_info *backing_dev_info;
int (*write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
/* In blackbox flight recorder like scenarios we want to make successful
writes in interrupt context. panic_write() is only intended to be
@ -308,6 +309,12 @@ static inline int mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
return mtd->read(mtd, from, len, retlen, buf);
}
static inline int mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
return mtd->write(mtd, to, len, retlen, buf);
}
static inline struct mtd_info *dev_to_mtd(struct device *dev)
{
return dev ? dev_get_drvdata(dev) : NULL;