Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 666/717] mtd: core: Fix refcounting for unpartitioned MTDs | Date | Mon, 28 Dec 2020 13:51:04 +0100 |
| |
From: Richard Weinberger <richard@nod.at>
commit 1ca71415f075353974524e96ed175306d8a937a8 upstream.
Apply changes to usecount also to the master partition. Otherwise we have no refcounting at all if an MTD has no partitions.
Cc: stable@vger.kernel.org Fixes: 46b5889cc2c5 ("mtd: implement proper partition handling") Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20201206202220.27290-1-richard@nod.at Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/mtd/mtdcore.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -993,6 +993,8 @@ int __get_mtd_device(struct mtd_info *mt } } + master->usecount++; + while (mtd->parent) { mtd->usecount++; mtd = mtd->parent; @@ -1059,6 +1061,8 @@ void __put_mtd_device(struct mtd_info *m mtd = mtd->parent; } + master->usecount--; + if (master->_put_device) master->_put_device(master);
| |