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| author | Felix Fietkau <nbd@openwrt.org> | 2012-10-10 11:38:44 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2012-10-10 11:38:44 +0000 |
| commit | f570c806ef507abc827f5ffaa5cc6d24ccd33585 (patch) | |
| tree | fe6062efa5f1436171393a2d0c00aca4ff200213 /target/linux/generic/patches-3.3/478-mtd-partial_eraseblock_unlock.patch | |
| parent | 1df0acf82eae02abe4e3826f93b3c7408464bc22 (diff) | |
| download | mtk-20170518-f570c806ef507abc827f5ffaa5cc6d24ccd33585.zip mtk-20170518-f570c806ef507abc827f5ffaa5cc6d24ccd33585.tar.gz mtk-20170518-f570c806ef507abc827f5ffaa5cc6d24ccd33585.tar.bz2 | |
mtd: allow partial block unlock
This allows sysupgrade for devices such as the Gateworks Avila/Cambria
product families based on the ixp4xx using the redboot bootloader with
combined FIS directory and RedBoot config partitions on larger FLASH
devices with larger eraseblocks.
This second iteration of this patch addresses previous issues:
- whitespace breakage fixed
- unlock in all scenarios
- simplification and fix logic bug
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
SVN-Revision: 33681
Diffstat (limited to 'target/linux/generic/patches-3.3/478-mtd-partial_eraseblock_unlock.patch')
| -rw-r--r-- | target/linux/generic/patches-3.3/478-mtd-partial_eraseblock_unlock.patch | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.3/478-mtd-partial_eraseblock_unlock.patch b/target/linux/generic/patches-3.3/478-mtd-partial_eraseblock_unlock.patch new file mode 100644 index 0000000..de4481a --- /dev/null +++ b/target/linux/generic/patches-3.3/478-mtd-partial_eraseblock_unlock.patch @@ -0,0 +1,18 @@ +--- a/drivers/mtd/mtdpart.c ++++ b/drivers/mtd/mtdpart.c +@@ -356,7 +356,14 @@ static int part_unlock(struct mtd_info * + struct mtd_part *part = PART(mtd); + if ((len + ofs) > mtd->size) + return -EINVAL; +- return mtd_unlock(part->master, ofs + part->offset, len); ++ ++ ofs += part->offset; ++ if (mtd->flags & MTD_ERASE_PARTIAL) { ++ /* round up len to next erasesize and round down offset to prev block */ ++ len = (mtd_div_by_eb(len, part->master) + 1) * part->master->erasesize; ++ ofs &= ~(part->master->erasesize - 1); ++ } ++ return mtd_unlock(part->master, ofs, len); + } + + static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len) |