ceph: cancel osd requests before resending them

This ensures we don't submit the same request twice if we are kicking a
specific osd (as with an osd_reset), or when we hit a transient error and
resend.

Signed-off-by: Sage Weil <sage@newdream.net>

fs/ceph/osd_client.c

@@ -813,10 +813,13 @@ static void kick_requests(struct ceph_osd_client *osdc,
 
 		if (req->r_resend) {
 			dout(" r_resend set on tid %llu\n", req->r_tid);
+			__cancel_request(req);
 			goto kick;
 		}
-		if (req->r_osd && kickosd == req->r_osd)
+		if (req->r_osd && kickosd == req->r_osd) {
+			__cancel_request(req);
 			goto kick;
+		}
 
 		err = __map_osds(osdc, req);
 		if (err == 0)