The loopback cdev created with cdev_create_loop() is used, but never opened. Open it before usage.
Not having it opened has the effect that during unmount of a loopback mounted file the devfs_remove() call for the loopback cdev fails, because the usage counter drops below zero. Signed-off-by: Sascha Hauer <[email protected]> --- fs/fs.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/fs.c b/fs/fs.c index 5e7e05f499..f24962d2a6 100644 --- a/fs/fs.c +++ b/fs/fs.c @@ -933,6 +933,13 @@ int fsdev_open_cdev(struct fs_device *fsdev) return ret; fsdev->cdev = cdev_create_loop(fsdev->backingstore, O_RDWR, offset); + if (fsdev->cdev) { + ret = cdev_open(fsdev->cdev, O_RDWR); + if (ret) { + cdev_remove_loop(fsdev->cdev); + fsdev->cdev = NULL; + } + } } else { fsdev->cdev = cdev_open_by_name(fsdev->backingstore, O_RDWR); } -- 2.39.5
