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mtd: Stop assuming mtd_erase() is asynchronous

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None of the mtd->_erase() implementations work in an asynchronous manner,
so let's simplify MTD users that call mtd_erase(). All they need to do
is check the value returned by mtd_erase() and assume that != 0 means
failure.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Boris Brezillon
2018-02-12 22:03:09 +01:00
parent dcba51bbb9
commit 884cfd9023
19 changed files with 51 additions and 369 deletions
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32
drivers/mtd/mtdswap.c
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@@ -536,18 +536,10 @@ static void mtdswap_store_eb(struct mtdswap_dev *d, struct swap_eb *eb)
mtdswap_rb_add(d, eb, MTDSWAP_HIFRAG);
}
static void mtdswap_erase_callback(struct erase_info *done)
{
wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
wake_up(wait_q);
}
static int mtdswap_erase_block(struct mtdswap_dev *d, struct swap_eb *eb)
{
struct mtd_info *mtd = d->mtd;
struct erase_info erase;
wait_queue_head_t wq;
unsigned int retries = 0;
int ret;
@@ -556,14 +548,11 @@ static int mtdswap_erase_block(struct mtdswap_dev *d, struct swap_eb *eb)
d->max_erase_count = eb->erase_count;
retry:
init_waitqueue_head(&wq);
memset(&erase, 0, sizeof(struct erase_info));
erase.mtd = mtd;
erase.callback = mtdswap_erase_callback;
erase.addr = mtdswap_eb_offset(d, eb);
erase.len = mtd->erasesize;
erase.priv = (u_long)&wq;
ret = mtd_erase(mtd, &erase);
if (ret) {
@@ -582,27 +571,6 @@ retry:
return -EIO;
}
ret = wait_event_interruptible(wq, erase.state == MTD_ERASE_DONE ||
erase.state == MTD_ERASE_FAILED);
if (ret) {
dev_err(d->dev, "Interrupted erase block %#llx erasure on %s\n",
erase.addr, mtd->name);
return -EINTR;
}
if (erase.state == MTD_ERASE_FAILED) {
if (retries++ < MTDSWAP_ERASE_RETRIES) {
dev_warn(d->dev,
"erase of erase block %#llx on %s failed",
erase.addr, mtd->name);
yield();
goto retry;
}
mtdswap_handle_badblock(d, eb);
return -EIO;
}
return 0;
}