ceph: avoid block operation when !TASK_RUNNING (ceph_mdsc_sync)

check_cap_flush() calls mutex_lock(), which may block. So we can't
use it as condition check function for wait_event();

Signed-off-by: Yan, Zheng <zyan@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 8ed1192606d9..844b57cb52bd 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -1450,8 +1450,8 @@ static int __mark_caps_flushing(struct inode *inode,
         spin_lock(&mdsc->cap_dirty_lock);
         list_del_init(&ci->i_dirty_item);
 
-        ci->i_cap_flush_seq = ++mdsc->cap_flush_seq;
         if (list_empty(&ci->i_flushing_item)) {
+                ci->i_cap_flush_seq = ++mdsc->cap_flush_seq;
                 list_add_tail(&ci->i_flushing_item, &session->s_cap_flushing);
                 mdsc->num_cap_flushing++;
                 dout(" inode %p now flushing seq %lld\n", inode,