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mtd: introduce mtd_erase interface 

This patch is part of a patch-set which changes the MTD interface
from 'mtd->func()' form to 'mtd_func()' form. We need this because
we want to add common code to to all drivers in the mtd core level,
which is impossible with the current interface when MTD clients
call driver functions like 'read()' or 'write()' directly.

At this point we just introduce a new inline wrapper function, but
later some of them are expected to gain more code. E.g., the input
parameters check should be moved to the wrappers rather than be
duplicated at many drivers.

This particular patch introduced the 'mtd_erase()' interface. The
following patches add all the other interfaces one by one.

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 15:25:39 +02:00 committed by David Woodhouse
parent 969e57adc2
commit 7e1f0dc055
22 changed files with 37 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/mtd/ftl.c
View File

@ -355,7 +355,7 @@ static int erase_xfer(partition_t *part,
erase->len = 1 << part->header.EraseUnitSize;
erase->priv = (u_long)part;
ret = part->mbd.mtd->erase(part->mbd.mtd, erase);
ret = mtd_erase(part->mbd.mtd, erase);
if (!ret)
xfer->EraseCount++;

4
drivers/mtd/inftlmount.c
View File

@ -220,7 +220,7 @@ static int find_boot_record(struct INFTLrecord *inftl)
*/
instr->addr = ip->Reserved0 * inftl->EraseSize;
instr->len = inftl->EraseSize;
mtd->erase(mtd, instr);
mtd_erase(mtd, instr);
}
if ((ip->lastUnit - ip->firstUnit + 1) < ip->virtualUnits) {
printk(KERN_WARNING "INFTL: Media Header "
@ -393,7 +393,7 @@ int INFTL_formatblock(struct INFTLrecord *inftl, int block)
mark only the failed block in the bbt. */
for (physblock = 0; physblock < inftl->EraseSize;
physblock += instr->len, instr->addr += instr->len) {
mtd->erase(inftl->mbd.mtd, instr);
mtd_erase(inftl->mbd.mtd, instr);
if (instr->state == MTD_ERASE_FAILED) {
printk(KERN_WARNING "INFTL: error while formatting block %d\n",

2
drivers/mtd/mtdblock.c
View File

@ -85,7 +85,7 @@ static int erase_write (struct mtd_info *mtd, unsigned long pos,
set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(&wait_q, &wait);
ret = mtd->erase(mtd, &erase);
ret = mtd_erase(mtd, &erase);
if (ret) {
set_current_state(TASK_RUNNING);
remove_wait_queue(&wait_q, &wait);

2
drivers/mtd/mtdchar.c
View File

@ -731,7 +731,7 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg)
wq_head is no longer there when the
callback routine tries to wake us up.
*/
ret = mtd->erase(mtd, erase);
ret = mtd_erase(mtd, erase);
if (!ret) {
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&waitq, &wait);

2
drivers/mtd/mtdconcat.c
View File

@ -379,7 +379,7 @@ static int concat_dev_erase(struct mtd_info *mtd, struct erase_info *erase)
* FIXME: Allow INTERRUPTIBLE. Which means
* not having the wait_queue head on the stack.
*/
err = mtd->erase(mtd, erase);
err = mtd_erase(mtd, erase);
if (!err) {
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&waitq, &wait);

2
drivers/mtd/mtdoops.c
View File

@ -112,7 +112,7 @@ static int mtdoops_erase_block(struct mtdoops_context *cxt, int offset)
set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(&wait_q, &wait);
ret = mtd->erase(mtd, &erase);
ret = mtd_erase(mtd, &erase);
if (ret) {
set_current_state(TASK_RUNNING);
remove_wait_queue(&wait_q, &wait);

2
drivers/mtd/mtdpart.c
View File

@ -257,7 +257,7 @@ static int part_erase(struct mtd_info *mtd, struct erase_info *instr)
if (instr->addr >= mtd->size)
return -EINVAL;
instr->addr += part->offset;
ret = part->master->erase(part->master, instr);
ret = mtd_erase(part->master, instr);
if (ret) {
if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
instr->fail_addr -= part->offset;

2
drivers/mtd/mtdswap.c
View File

@ -567,7 +567,7 @@ retry:
erase.len = mtd->erasesize;
erase.priv = (u_long)&wq;
ret = mtd->erase(mtd, &erase);
ret = mtd_erase(mtd, &erase);
if (ret) {
if (retries++ < MTDSWAP_ERASE_RETRIES) {
dev_warn(d->dev,

2
drivers/mtd/nftlmount.c
View File

@ -326,7 +326,7 @@ int NFTL_formatblock(struct NFTLrecord *nftl, int block)
instr->mtd = nftl->mbd.mtd;
instr->addr = block * nftl->EraseSize;
instr->len = nftl->EraseSize;
mtd->erase(mtd, instr);
mtd_erase(mtd, instr);
if (instr->state == MTD_ERASE_FAILED) {
printk("Error while formatting block %d\n", block);

2
drivers/mtd/rfd_ftl.c
View File

@ -342,7 +342,7 @@ static int erase_block(struct partition *part, int block)
part->blocks[block].state = BLOCK_ERASING;
part->blocks[block].free_sectors = 0;
rc = part->mbd.mtd->erase(part->mbd.mtd, erase);
rc = mtd_erase(part->mbd.mtd, erase);
if (rc) {
printk(KERN_ERR PREFIX "erase of region %llx,%llx on '%s' "

2
drivers/mtd/sm_ftl.c
View File

@ -479,7 +479,7 @@ static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block,
return -EIO;
}
if (mtd->erase(mtd, &erase)) {
if (mtd_erase(mtd, &erase)) {
sm_printk("erase of block %d in zone %d failed",
block, zone_num);
goto error;

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

@ -78,7 +78,7 @@ static int erase_eraseblock(int ebnum)
ei.addr = addr;
ei.len = mtd->erasesize;
err = mtd->erase(mtd, &ei);
err = mtd_erase(mtd, &ei);
if (err) {
printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
return err;

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

@ -77,7 +77,7 @@ static int erase_eraseblock(int ebnum)
ei.addr = addr;
ei.len = mtd->erasesize;
err = mtd->erase(mtd, &ei);
err = mtd_erase(mtd, &ei);
if (err) {
printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
return err;

4
drivers/mtd/tests/mtd_speedtest.c
View File

@ -79,7 +79,7 @@ static int erase_eraseblock(int ebnum)
ei.addr = addr;
ei.len = mtd->erasesize;
err = mtd->erase(mtd, &ei);
err = mtd_erase(mtd, &ei);
if (err) {
printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
return err;
@ -105,7 +105,7 @@ static int multiblock_erase(int ebnum, int blocks)
ei.addr = addr;
ei.len = mtd->erasesize * blocks;
err = mtd->erase(mtd, &ei);
err = mtd_erase(mtd, &ei);
if (err) {
printk(PRINT_PREF "error %d while erasing EB %d, blocks %d\n",
err, ebnum, blocks);

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

@ -112,7 +112,7 @@ static int erase_eraseblock(int ebnum)
ei.addr = addr;
ei.len = mtd->erasesize;
err = mtd->erase(mtd, &ei);
err = mtd_erase(mtd, &ei);
if (unlikely(err)) {
printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
return err;

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

@ -80,7 +80,7 @@ static int erase_eraseblock(int ebnum)
ei.addr = addr;
ei.len = mtd->erasesize;
err = mtd->erase(mtd, &ei);
err = mtd_erase(mtd, &ei);
if (err) {
printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
return err;

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

@ -105,7 +105,7 @@ static inline int erase_eraseblock(int ebnum)
ei.addr = addr;
ei.len = mtd->erasesize;
err = mtd->erase(mtd, &ei);
err = mtd_erase(mtd, &ei);
if (err) {
printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
return err;

2
drivers/mtd/ubi/io.c
View File

@ -361,7 +361,7 @@ retry:
ei.callback = erase_callback;
ei.priv = (unsigned long)&wq;
err = ubi->mtd->erase(ubi->mtd, &ei);
err = mtd_erase(ubi->mtd, &ei);
if (err) {
if (retries++ < UBI_IO_RETRIES) {
dbg_io("error %d while erasing PEB %d, retry",

2
drivers/staging/spectra/lld_mtd.c
View File

@ -188,7 +188,7 @@ u16 mtd_Erase_Block(u32 block_add)
erase.len = spectra_mtd->erasesize;
erase.priv = (unsigned long)&comp;
ret = spectra_mtd->erase(spectra_mtd, &erase);
ret = mtd_erase(spectra_mtd, &erase);
if (!ret) {
wait_for_completion(&comp);
if (erase.state != MTD_ERASE_DONE)

2
fs/jffs2/erase.c
View File

@ -74,7 +74,7 @@ static void jffs2_erase_block(struct jffs2_sb_info *c,
((struct erase_priv_struct *)instr->priv)->jeb = jeb;
((struct erase_priv_struct *)instr->priv)->c = c;
ret = c->mtd->erase(c->mtd, instr);
ret = mtd_erase(c->mtd, instr);
if (!ret)
return;

2
fs/logfs/dev_mtd.c
View File

@ -105,7 +105,7 @@ static int logfs_mtd_erase(struct super_block *sb, loff_t ofs, size_t len,
ei.len = len;
ei.callback = logfs_erase_callback;
ei.priv = (long)&complete;
ret = mtd->erase(mtd, &ei);
ret = mtd_erase(mtd, &ei);
if (ret)
return -EIO;

19
include/linux/mtd/mtd.h
View File

@ -171,11 +171,8 @@ struct mtd_info {
struct mtd_erase_region_info *eraseregions;
/*
* Erase is an asynchronous operation. Device drivers are supposed
* to call instr->callback() whenever the operation completes, even
* if it completes with a failure.
* Callers are supposed to pass a callback function and wait for it
* to be called before writing to the block.
* Do not call via these pointers, use corresponding mtd_*()
* wrappers instead.
*/
int (*erase) (struct mtd_info *mtd, struct erase_info *instr);
@ -274,6 +271,18 @@ struct mtd_info {
void (*put_device) (struct mtd_info *mtd);
};
/*
* Erase is an asynchronous operation. Device drivers are supposed
* to call instr->callback() whenever the operation completes, even
* if it completes with a failure.
* Callers are supposed to pass a callback function and wait for it
* to be called before writing to the block.
*/
static inline int mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
{
return mtd->erase(mtd, instr);
}
static inline struct mtd_info *dev_to_mtd(struct device *dev)
{
return dev ? dev_get_drvdata(dev) : NULL;