mtd: partitions: support a cleanup callback for parsers

If partition parsers need to clean up their resources, we shouldn't
assume that all memory will fit in a single kmalloc() that the caller
can kfree(). We should allow the parser to provide a proper cleanup
routine.

Note that this means we need to keep a hold on the parser's module for a
bit longer, and release it later with mtd_part_parser_put().

Alongside this, define a default callback that we'll automatically use
if the parser doesn't provide one, so we can still retain the old
behavior.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h
index cceaf7bd1537..70736e1e6c8f 100644
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -71,6 +71,7 @@ struct mtd_part_parser {
         const char *name;
         int (*parse_fn)(struct mtd_info *, const struct mtd_partition **,
                         struct mtd_part_parser_data *);
+        void (*cleanup)(const struct mtd_partition *pparts, int nr_parts);
 };
 
 /* Container for passing around a set of parsed partitions */