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UBI: rename IO error code 

Rename UBI_IO_BAD_HDR_READ into UBI_IO_BAD_HDR_EBADMSG which is presumably more
self-documenting and readable. Indeed, the '_READ' suffix does not tell much and
even confuses, while '_EBADMSG' tells about uncorrectable ECC error, because we
use -EBADMSG all over the place to represent ECC errors.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2010-09-03 01:30:16 +03:00
parent c174a08c72
commit 756e1df1d2
5 changed files with 30 additions and 24 deletions
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4
drivers/mtd/ubi/eba.c
View File

@ -418,7 +418,7 @@ retry:
* may try to recover data. FIXME: but this is
* not implemented.
*/
if (err == UBI_IO_BAD_HDR_READ ||
if (err == UBI_IO_BAD_HDR_EBADMSG ||
err == UBI_IO_BAD_HDR) {
ubi_warn("corrupted VID header at PEB "
"%d, LEB %d:%d", pnum, vol_id,
@ -963,7 +963,7 @@ write_error:
static int is_error_sane(int err)
{
if (err == -EIO || err == -ENOMEM || err == UBI_IO_BAD_HDR ||
err == UBI_IO_BAD_HDR_READ || err == -ETIMEDOUT)
err == UBI_IO_BAD_HDR_EBADMSG || err == -ETIMEDOUT)
return 0;
return 1;
}

33
drivers/mtd/ubi/io.c
View File

@ -517,7 +517,7 @@ static int nor_erase_prepare(struct ubi_device *ubi, int pnum)
* In this case we probably anyway have garbage in this PEB.
*/
err1 = ubi_io_read_vid_hdr(ubi, pnum, &vid_hdr, 0);
if (err1 == UBI_IO_BAD_HDR_READ || err1 == UBI_IO_BAD_HDR)
if (err1 == UBI_IO_BAD_HDR_EBADMSG || err1 == UBI_IO_BAD_HDR)
/*
* The VID header is corrupted, so we can safely erase this
* PEB and not afraid that it will be treated as a valid PEB in
@ -712,6 +712,8 @@ bad:
* and corrected by the flash driver; this is harmless but may indicate that
* this eraseblock may become bad soon (but may be not);
* o %UBI_IO_BAD_HDR if the erase counter header is corrupted (a CRC error);
* o %UBI_IO_BAD_HDR_EBADMSG is the same as %UBI_IO_BAD_HDR, but there also was
* a data integrity error (uncorrectable ECC error in case of NAND);
* o %UBI_IO_PEB_EMPTY if the physical eraseblock is empty;
* o a negative error code in case of failure.
*/
@ -731,15 +733,15 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
/*
* We read all the data, but either a correctable bit-flip
* occurred, or MTD reported about some data integrity error,
* like an ECC error in case of NAND. The former is harmless,
* the later may mean that the read data is corrupted. But we
* have a CRC check-sum and we will detect this. If the EC
* header is still OK, we just report this as there was a
* bit-flip.
* occurred, or MTD reported a data integrity error
* (uncorrectable ECC error in case of NAND). The former is
* harmless, the later may mean that the read data is
* corrupted. But we have a CRC check-sum and we will detect
* this. If the EC header is still OK, we just report this as
* there was a bit-flip, to force scrubbing.
*/
if (err == -EBADMSG)
read_err = UBI_IO_BAD_HDR_READ;
read_err = UBI_IO_BAD_HDR_EBADMSG;
}
magic = be32_to_cpu(ec_hdr->magic);
@ -983,6 +985,8 @@ bad:
* this eraseblock may become bad soon;
* o %UBI_IO_BAD_HDR if the volume identifier header is corrupted (a CRC
* error detected);
* o %UBI_IO_BAD_HDR_EBADMSG is the same as %UBI_IO_BAD_HDR, but there also was
* a data integrity error (uncorrectable ECC error in case of NAND);
* o %UBI_IO_PEB_FREE if the physical eraseblock is free (i.e., there is no VID
* header there);
* o a negative error code in case of failure.
@ -1006,14 +1010,15 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
/*
* We read all the data, but either a correctable bit-flip
* occurred, or MTD reported about some data integrity error,
* like an ECC error in case of NAND. The former is harmless,
* the later may mean the read data is corrupted. But we have a
* CRC check-sum and we will identify this. If the VID header is
* still OK, we just report this as there was a bit-flip.
* occurred, or MTD reported a data integrity error
* (uncorrectable ECC error in case of NAND). The former is
* harmless, the later may mean that the read data is
* corrupted. But we have a CRC check-sum and we will detect
* this. If the VID header is still OK, we just report this as
* there was a bit-flip, to force scrubbing.
*/
if (err == -EBADMSG)
read_err = UBI_IO_BAD_HDR_READ;
read_err = UBI_IO_BAD_HDR_EBADMSG;
}
magic = be32_to_cpu(vid_hdr->magic);

8
drivers/mtd/ubi/scan.c
View File

@ -750,7 +750,7 @@ static int process_eb(struct ubi_device *ubi, struct ubi_scan_info *si,
bitflips = 1;
else if (err == UBI_IO_PEB_EMPTY)
return add_to_list(si, pnum, UBI_SCAN_UNKNOWN_EC, &si->erase);
else if (err == UBI_IO_BAD_HDR_READ || err == UBI_IO_BAD_HDR) {
else if (err == UBI_IO_BAD_HDR_EBADMSG || err == UBI_IO_BAD_HDR) {
/*
* We have to also look at the VID header, possibly it is not
* corrupted. Set %bitflips flag in order to make this PEB be
@ -816,11 +816,11 @@ static int process_eb(struct ubi_device *ubi, struct ubi_scan_info *si,
return err;
else if (err == UBI_IO_BITFLIPS)
bitflips = 1;
else if (err == UBI_IO_BAD_HDR_READ || err == UBI_IO_BAD_HDR ||
else if (err == UBI_IO_BAD_HDR_EBADMSG || err == UBI_IO_BAD_HDR ||
(err == UBI_IO_PEB_FREE && ec_corr)) {
/* VID header is corrupted */
if (err == UBI_IO_BAD_HDR_READ ||
ec_corr == UBI_IO_BAD_HDR_READ)
if (err == UBI_IO_BAD_HDR_EBADMSG ||
ec_corr == UBI_IO_BAD_HDR_EBADMSG)
si->read_err_count += 1;
err = add_to_list(si, pnum, ec, &si->corr);
if (err)

2
drivers/mtd/ubi/scan.h
View File

@ -93,7 +93,7 @@ struct ubi_scan_volume {
* those belonging to "preserve"-compatible internal volumes)
* @used_peb_count: count of used PEBs
* @corr_peb_count: count of PEBs in the @corr list
* @read_err_count: count of PEBs read with error (%UBI_IO_BAD_HDR_READ was
* @read_err_count: count of PEBs read with error (%UBI_IO_BAD_HDR_EBADMSG was
* returned)
* @free_peb_count: count of PEBs in the @free list
* @erase_peb_count: count of PEBs in the @erase list

7
drivers/mtd/ubi/ubi.h
View File

@ -90,15 +90,16 @@
* UBI_IO_PEB_FREE: the physical eraseblock is free, i.e. it contains only a
* valid erase counter header, and the rest are %0xFF bytes
* UBI_IO_BAD_HDR: the EC or VID header is corrupted (bad magic or CRC)
* UBI_IO_BAD_HDR_READ: the same as %UBI_IO_BAD_HDR, but also there was a read
* error reported by the flash driver
* UBI_IO_BAD_HDR_EBADMSG: the same as %UBI_IO_BAD_HDR, but also there was a
* data integrity error reported by the MTD driver
* (uncorrectable ECC error in case of NAND)
* UBI_IO_BITFLIPS: bit-flips were detected and corrected
*/
enum {
UBI_IO_PEB_EMPTY = 1,
UBI_IO_PEB_FREE,
UBI_IO_BAD_HDR,
UBI_IO_BAD_HDR_READ,
UBI_IO_BAD_HDR_EBADMSG,
UBI_IO_BITFLIPS
};