diff options
| author | Zev Weiss <zev@bewilderbeest.net> | 2021-10-14 23:39:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 21:17:01 +0300 |
| commit | 62eaaa154c8fce93ef35685cca30a6fcb577509e (patch) | |
| tree | 52030d6edd727dbc2ed52552d0a0d8f659d1cb81 | |
| parent | 152d0b535426ae8b86367251a175dc3417feddfd (diff) | |
| download | linux-62eaaa154c8fce93ef35685cca30a6fcb577509e.tar.xz | |
mtd: core: don't remove debugfs directory if device is in use
[ Upstream commit c13de2386c78e890d4ae6f01a85eefd0b293fb08 ]
Previously, if del_mtd_device() failed with -EBUSY due to a non-zero
usecount, a subsequent call to attempt the deletion again would try to
remove a debugfs directory that had already been removed and panic.
With this change the second call can instead proceed safely.
Fixes: e8e3edb95ce6 ("mtd: create per-device and module-scope debugfs entries")
Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20211014203953.5424-1-zev@bewilderbeest.net
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/mtd/mtdcore.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index c8fd7f758938..153229198947 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -724,8 +724,6 @@ int del_mtd_device(struct mtd_info *mtd) mutex_lock(&mtd_table_mutex); - debugfs_remove_recursive(mtd->dbg.dfs_dir); - if (idr_find(&mtd_idr, mtd->index) != mtd) { ret = -ENODEV; goto out_error; @@ -741,6 +739,8 @@ int del_mtd_device(struct mtd_info *mtd) mtd->index, mtd->name, mtd->usecount); ret = -EBUSY; } else { + debugfs_remove_recursive(mtd->dbg.dfs_dir); + /* Try to remove the NVMEM provider */ if (mtd->nvmem) nvmem_unregister(mtd->nvmem); |