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mtd: core: Fix refcounting for unpartitioned MTDs

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commit 1ca71415f0 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: 46b5889cc2 ("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>
This commit is contained in:
Richard Weinberger 2020-12-06 21:22:20 +01:00 committed by Greg Kroah-Hartman
parent 9e43463d5a
commit d5e3fc275e
1 changed files with 4 additions and 0 deletions
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4
drivers/mtd/mtdcore.c
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@ -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);