smb: client: introduce close_cached_dir_locked()

Replace close_cached_dir() calls under cfid_list_lock with a new
close_cached_dir_locked() variant that uses kref_put() instead of
kref_put_lock() to avoid recursive locking when dropping references.

While the existing code works if the refcount >= 2 invariant holds,
this area has proven error-prone. Make deadlocks impossible and WARN
on invariant violations.

Cc: [email protected]
Reviewed-by: David Howells <[email protected]>
Signed-off-by: Henrique Carvalho <[email protected]>
Signed-off-by: Steve French <[email protected]>

0 files changed, 0 insertions, 0 deletions