/**
* torture_peb - test a supposedly bad physical eraseblock.
* @ubi: UBI device description object
* @pnum: the physical eraseblock number to test
*
* This function returns %-EIO if the physical eraseblock did not pass the
* test, a positive number of erase operations done if the test was
* successfully passed, and other negative error codes in case of other errors.
*/
static int torture_peb(struct ubi_device *ubi, int pnum)
{
int err, i, patt_count;
patt_count = ARRAY_SIZE(patterns);
ubi_assert(patt_count > 0);
mutex_lock(&ubi->buf_mutex);
for (i = 0; i < patt_count; i++) {
err = do_sync_erase(ubi, pnum);
if (err)
goto out;
/* Make sure the PEB contains only 0xFF bytes */
err = ubi_io_read(ubi, ubi->peb_buf1, pnum, 0, ubi->peb_size);
if (err)
goto out;
err = check_pattern(ubi->peb_buf1, 0xFF, ubi->peb_size);
if (err == 0) {
ubi_err("erased PEB %d, but a non-0xFF byte found",
pnum);
err = -EIO;
goto out;
}
/* Write a pattern and check it */
memset(ubi->peb_buf1, patterns[i], ubi->peb_size);
err = ubi_io_write(ubi, ubi->peb_buf1, pnum, 0, ubi->peb_size);
if (err)
goto out;
memset(ubi->peb_buf1, ~patterns[i], ubi->peb_size);
err = ubi_io_read(ubi, ubi->peb_buf1, pnum, 0, ubi->peb_size);
if (err)
goto out;
err = check_pattern(ubi->peb_buf1, patterns[i], ubi->peb_size);
if (err == 0) {
ubi_err("pattern %x checking failed for PEB %d",
patterns[i], pnum);
err = -EIO;
goto out;
}
}
err = patt_count;
out:
mutex_unlock(&ubi->buf_mutex);
if (err == UBI_IO_BITFLIPS || err == -EBADMSG) {
/*
* If a bit-flip or data integrity error was detected, the test
* has not passed because it happened on a freshly erased
* physical eraseblock which means something is wrong with it.
*/
ubi_err("read problems on freshly erased PEB %d, must be bad",
pnum);
err = -EIO;
}
return err;
}
/**
* torture_peb - test a supposedly bad physical eraseblock.
* @ubi: UBI device description object
* @pnum: the physical eraseblock number to test
*
* This function returns %-EIO if the physical eraseblock did not pass the
* test, a positive number of erase operations done if the test was
* successfully passed, and other negative error codes in case of other errors.
*/
static int torture_peb(struct ubi_device *ubi, int pnum)
{
int err, i, patt_count;
ubi_msg("run torture test for PEB %d", pnum);
patt_count = ARRAY_SIZE(patterns);
ubi_assert(patt_count > 0);
mutex_lock(&ubi->buf_mutex);
for (i = 0; i < patt_count; i++) {
err = do_sync_erase(ubi, pnum);
if (err)
{
#ifndef NO_FREESTYLE
dbg_drv (" ** %s ** 0", __func__);
#endif
goto out;
}
/* Make sure the PEB contains only 0xFF bytes */
err = ubi_io_read(ubi, ubi->peb_buf, pnum, 0, ubi->peb_size);
if (err)
{
#ifndef NO_FREESTYLE
dbg_drv (" ** %s ** 1", __func__);
#endif
goto out;
}
err = ubi_check_pattern(ubi->peb_buf, 0xFF, ubi->peb_size);
if (err == 0) {
ubi_err("erased PEB %d, but a non-0xFF byte found",
pnum);
err = -EIO;
goto out;
}
/* Write a pattern and check it */
memset(ubi->peb_buf, patterns[i], ubi->peb_size);
err = ubi_io_write(ubi, ubi->peb_buf, pnum, 0, ubi->peb_size);
#ifndef NO_FREESTYLE
if (err)
{
dbg_drv (" ** %s ** io_write error ", __func__);
goto out;
}
#else
if (err)
goto out;
#endif
memset(ubi->peb_buf, ~patterns[i], ubi->peb_size);
err = ubi_io_read(ubi, ubi->peb_buf, pnum, 0, ubi->peb_size);
#ifndef NO_FREESTYLE
if (err)
{
dbg_drv("========%s\t3 pattern: [%02x]", __func__, patterns[i]);
goto out;
}
#else
if (err)
goto out;
#endif
err = ubi_check_pattern(ubi->peb_buf, patterns[i],
ubi->peb_size);
if (err == 0) {
ubi_err("pattern %x checking failed for PEB %d",
patterns[i], pnum);
err = -EIO;
goto out;
}
}
err = patt_count;
ubi_msg("PEB %d passed torture test, do not mark it as bad", pnum);
out:
mutex_unlock(&ubi->buf_mutex);
if (err == UBI_IO_BITFLIPS || mtd_is_eccerr(err)) {
/*
* If a bit-flip or data integrity error was detected, the test
* has not passed because it happened on a freshly erased
* physical eraseblock which means something is wrong with it.
*/
ubi_err("read problems on freshly erased PEB %d, must be bad",
pnum);
err = -EIO;
}
return err;
}
