diff options
Diffstat (limited to 'target/linux/generic/pending-4.14/412-mtd-partial_eraseblock_unlock.patch')
| -rw-r--r-- | target/linux/generic/pending-4.14/412-mtd-partial_eraseblock_unlock.patch | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/target/linux/generic/pending-4.14/412-mtd-partial_eraseblock_unlock.patch b/target/linux/generic/pending-4.14/412-mtd-partial_eraseblock_unlock.patch new file mode 100644 index 0000000000..fd6ffc6fa9 --- /dev/null +++ b/target/linux/generic/pending-4.14/412-mtd-partial_eraseblock_unlock.patch @@ -0,0 +1,40 @@ +From: Tim Harvey <tharvey@gateworks.com> +Subject: 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 + +[john@phrozen.org: this should be moved to the ixp4xx folder] + +Signed-off-by: Tim Harvey <tharvey@gateworks.com> +--- + drivers/mtd/mtdpart.c | 11 ++++++++++- + 1 file changed, 10 insertions(+), 1 deletion(-) + +--- a/drivers/mtd/mtdpart.c ++++ b/drivers/mtd/mtdpart.c +@@ -343,7 +343,16 @@ static int part_lock(struct mtd_info *mt + static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) + { + struct mtd_part *part = mtd_to_part(mtd); +- return part->parent->_unlock(part->parent, 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->parent) + 1) * part->parent->erasesize; ++ ofs &= ~(part->parent->erasesize - 1); ++ } ++ ++ return part->parent->_unlock(part->parent, ofs, len); + } + + static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len) |