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| author |   Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-05-05 17:36:17 +0300 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-07-18 16:53:00 +0300 |
| commit | 79b510c0f21174f4bd055d1aab156e548ae3a5f2 (patch) | |
| tree | 08246f4e5ef5e59d8dc497717e3881ce997d88d3 /drivers/mtd | |
| parent | UBI: set correct gluebi device size (diff) | |
| download | linux-dev-79b510c0f21174f4bd055d1aab156e548ae3a5f2.tar.xz linux-dev-79b510c0f21174f4bd055d1aab156e548ae3a5f2.zip | |
UBI: add few more comments
Add few comments above ubi_scan_add_used() to explain why it is so
complex. Requested by Satyam Sharma <satyam.sharma@gmail.com>.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/ubi/scan.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c index 197cd650356b..b24af2104a2a 100644 --- a/drivers/mtd/ubi/scan.c +++ b/drivers/mtd/ubi/scan.c @@ -407,8 +407,12 @@ out_free_vidh: * @vid_hdr: the volume identifier header * @bitflips: if bit-flips were detected when this physical eraseblock was read * - * This function returns zero in case of success and a negative error code in - * case of failure. + * This function adds information about a used physical eraseblock to the + * 'used' tree of the corresponding volume. The function is rather complex + * because it has to handle cases when this is not the first physical + * eraseblock belonging to the same logical eraseblock, and the newer one has + * to be picked, while the older one has to be dropped. This function returns + * zero in case of success and a negative error code in case of failure. */ int ubi_scan_add_used(const struct ubi_device *ubi, struct ubi_scan_info *si, int pnum, int ec, const struct ubi_vid_hdr *vid_hdr, |