Commit 1ca71415 authored Dec 06, 2020 by Richard Weinberger Committed by Miquel Raynal Dec 07, 2020

mtd: core: Fix refcounting for unpartitioned MTDs



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: 46b5889c ("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

parent 18b9c940

drivers/mtd/mtdcore.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -993,6 +993,8 @@ int __get_mtd_device(struct mtd_info *mtd)
		}
		}

		master->usecount++;

		while (mtd->parent) {
		mtd->usecount++;
		mtd = mtd->parent;
		@@ -1059,6 +1061,8 @@ void __put_mtd_device(struct mtd_info *mtd)
		mtd = mtd->parent;
		}

		master->usecount--;

		if (master->_put_device)
		master->_put_device(master);

Admin message