From: David Howells dhowells@redhat.com
[ Upstream commit fd711586bb7d63f257da5eff234e68c446ac35ea ]
When __afs_break_callback() clears the CB_PROMISED flag, it increments vnode->cb_break to trigger a future refetch of the status and callback - however it also calls afs_clear_permits(), which also increments vnode->cb_break.
Fix this by removing the increment from afs_clear_permits().
Whilst we're at it, fix the conditional call to afs_put_permits() as the function checks to see if the argument is NULL, so the check is redundant.
Fixes: be080a6f43c4 ("afs: Overhaul permit caching"); Signed-off-by: David Howells dhowells@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- fs/afs/security.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/fs/afs/security.c b/fs/afs/security.c index 81dfedb..66042b4 100644 --- a/fs/afs/security.c +++ b/fs/afs/security.c @@ -87,11 +87,9 @@ void afs_clear_permits(struct afs_vnode *vnode) permits = rcu_dereference_protected(vnode->permit_cache, lockdep_is_held(&vnode->lock)); RCU_INIT_POINTER(vnode->permit_cache, NULL); - vnode->cb_break++; spin_unlock(&vnode->lock);
- if (permits) - afs_put_permits(permits); + afs_put_permits(permits); }
/*