diff options
| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2010-10-19 21:00:11 +0200 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2010-10-21 10:20:36 +0200 |
| commit | fb22b59b2c38054cc847f6acc5c46daa26dc6dd3 (patch) | |
| tree | 76025e34f0934b8e7186972e43849dc4a8f19606 /drivers/mtd/ubi/scan.c | |
| parent | UBI: preserve corrupted PEBs (diff) | |
| download | linux-fb22b59b2c38054cc847f6acc5c46daa26dc6dd3.tar.xz linux-fb22b59b2c38054cc847f6acc5c46daa26dc6dd3.zip | |
UBI: remember copy_flag while scanning
While scanning the flash we read all VID headers and store some important
information in 'struct ubi_scan_leb'. Store also the 'copy_flag' value there
as it is needed when comparing LEBs. We do not increase memory consumption
because this is just one bit and we have plenty of spare bits in
'struct ubi_scan_leb' (sizeof(struct ubi_scan_leb) is 48 both with and
without this patch).
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers/mtd/ubi/scan.c')
| -rw-r--r-- | drivers/mtd/ubi/scan.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c index 30b710216f26..2fbb571b9828 100644 --- a/drivers/mtd/ubi/scan.c +++ b/drivers/mtd/ubi/scan.c @@ -330,12 +330,18 @@ static int compare_lebs(struct ubi_device *ubi, const struct ubi_scan_leb *seb, return 1; } } else { - pnum = seb->pnum; + if (!seb->copy_flag) { + /* It is not a copy, so it is newer */ + dbg_bld("first PEB %d is newer, copy_flag is unset", + pnum); + return bitflips << 1; + } vh = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL); if (!vh) return -ENOMEM; + pnum = seb->pnum; err = ubi_io_read_vid_hdr(ubi, pnum, vh, 0); if (err) { if (err == UBI_IO_BITFLIPS) @@ -350,14 +356,6 @@ static int compare_lebs(struct ubi_device *ubi, const struct ubi_scan_leb *seb, } } - if (!vh->copy_flag) { - /* It is not a copy, so it is newer */ - dbg_bld("first PEB %d is newer, copy_flag is unset", - pnum); - err = bitflips << 1; - goto out_free_vidh; - } - vid_hdr = vh; } @@ -516,6 +514,7 @@ int ubi_scan_add_used(struct ubi_device *ubi, struct ubi_scan_info *si, seb->ec = ec; seb->pnum = pnum; seb->scrub = ((cmp_res & 2) || bitflips); + seb->copy_flag = vid_hdr->copy_flag; seb->sqnum = sqnum; if (sv->highest_lnum == lnum) @@ -549,8 +548,9 @@ int ubi_scan_add_used(struct ubi_device *ubi, struct ubi_scan_info *si, seb->ec = ec; seb->pnum = pnum; seb->lnum = lnum; - seb->sqnum = sqnum; seb->scrub = bitflips; + seb->copy_flag = vid_hdr->copy_flag; + seb->sqnum = sqnum; if (sv->highest_lnum <= lnum) { sv->highest_lnum = lnum; |