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);