summaryrefslogtreecommitdiff
path: root/target/linux/generic/patches-4.9/412-mtd-partial_eraseblock_unlock.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/generic/patches-4.9/412-mtd-partial_eraseblock_unlock.patch')
-rw-r--r--target/linux/generic/patches-4.9/412-mtd-partial_eraseblock_unlock.patch20
1 files changed, 20 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.9/412-mtd-partial_eraseblock_unlock.patch b/target/linux/generic/patches-4.9/412-mtd-partial_eraseblock_unlock.patch
new file mode 100644
index 0000000..e7c91c6
--- /dev/null
+++ b/target/linux/generic/patches-4.9/412-mtd-partial_eraseblock_unlock.patch
@@ -0,0 +1,20 @@
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -337,7 +337,16 @@ 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->master->_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 part->master->_unlock(part->master, ofs, len);
+ }
+
+ static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)