The miscdevice core now sets file->private_data to the struct miscdevice
so don't fail when this is not NULL.

Signed-off-by: Martin Kepplinger <mart...@posteo.de>
---
This is a question: what does this check provide and does overwriting
file->private_data make any difference?

Is miscdevice's open() by the user not allowed here, if file->private_data
is set?

thanks!!

 fs/btrfs/ioctl.c |    4 ----
 1 file changed, 4 deletions(-)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 4399f0c..066ce41 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3752,10 +3752,6 @@ static long btrfs_ioctl_trans_start(struct file *file)
        if (!capable(CAP_SYS_ADMIN))
                goto out;
 
-       ret = -EINPROGRESS;
-       if (file->private_data)
-               goto out;
-
        ret = -EROFS;
        if (btrfs_root_readonly(root))
                goto out;
-- 
1.7.10.4

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