+ mutex_lock(&tcon->crfid.fid_mutex);
+
+ /*
+ * Now we need to check again as the cached root might have
+ * been successfully re-opened from a concurrent process
+ */
+
+ if (tcon->crfid.is_valid) {
+ /* work was already done */
+
+ /* stash fids for close() later */
+ struct cifs_fid fid = {
+ .persistent_fid = pfid->persistent_fid,
+ .volatile_fid = pfid->volatile_fid,
+ };
+
+ /*
+ * Caller expects this func to set pfid to a valid
+ * cached root, so we copy the existing one and get a
+ * reference
+ */
+ memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
+ kref_get(&tcon->crfid.refcount);
+
+ mutex_unlock(&tcon->crfid.fid_mutex);
+
+ if (rc == 0) {
+ /* close extra handle outside of critical section */
+ SMB2_close(xid, tcon, fid.persistent_fid,
+ fid.volatile_fid);
+ }
+ return 0;
+ }
+
+ /* Cached root is still invalid, continue normaly */
+