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--- a/drivers/mtd/mtdpart.c
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+++ b/drivers/mtd/mtdpart.c
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@@ -336,7 +336,14 @@ static int part_lock(struct mtd_info *mt
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static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
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{
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struct mtd_part *part = PART(mtd);
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- return part->master->_unlock(part->master, ofs + part->offset, len);
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+
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+ ofs += part->offset;
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+ if (mtd->flags & MTD_ERASE_PARTIAL) {
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+ /* round up len to next erasesize and round down offset to prev block */
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+ len = (mtd_div_by_eb(len, part->master) + 1) * part->master->erasesize;
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+ ofs &= ~(part->master->erasesize - 1);
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+ }
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+ return part->master->_unlock(part->master, ofs, len);
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}
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static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
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