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 <s.hauer@xxxxxxxxxxxxxx>
---
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
