From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CFB5DC25B4E for ; Tue, 24 Jan 2023 13:45:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232302AbjAXNo7 (ORCPT ); Tue, 24 Jan 2023 08:44:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35506 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234414AbjAXNoj (ORCPT ); Tue, 24 Jan 2023 08:44:39 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 76FB615540; Tue, 24 Jan 2023 05:43:26 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9782860FAC; Tue, 24 Jan 2023 13:43:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A5DEC4339C; Tue, 24 Jan 2023 13:43:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1674567802; bh=mJLPCi/3sB+LqCzxEK11/00G7g5mPE/RTW6D4kkkB5M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LgVisdwT7H50R31VxcMgggTZ/I+BfDpDMu5lJkWRV/Uucmd+7TdF50iNL3EeyoCNa Hwslc4OfTaLpJ1vXQN5YSx8XXjyZUsqbDIyOpyeey4UQY7tR6J2kynBSnOT/YEA4Vb MZoHR16vtZ4zxKakbIWexi07SAcTF4kFJ2yjOOxJ+NvSvrgBKJ5XQ0nLFmNuWaq66b DzvrAj8T7s+5pp8f0sD3LUMDxGndlA7qMjj+QWJxABV0xGphiCiaW3lqW0O/vn7ScH Hpr4yV9vsrYqoFtcIGWSbdmTyDSdfVmkYHqAqBZV1eR8sm58nAScdI+iIAbEhEFzHl BPL8rad4CcrlQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Yu Kuai , Tejun Heo , Jens Axboe , Sasha Levin , josef@toxicpanda.com, cgroups@vger.kernel.org, linux-block@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 10/14] blk-cgroup: fix missing pd_online_fn() while activating policy Date: Tue, 24 Jan 2023 08:42:53 -0500 Message-Id: <20230124134257.637523-10-sashal@kernel.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230124134257.637523-1-sashal@kernel.org> References: <20230124134257.637523-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Yu Kuai [ Upstream commit e3ff8887e7db757360f97634e0d6f4b8e27a8c46 ] If the policy defines pd_online_fn(), it should be called after pd_init_fn(), like blkg_create(). Signed-off-by: Yu Kuai Acked-by: Tejun Heo Link: https://lore.kernel.org/r/20230103112833.2013432-1-yukuai1@huaweicloud.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- block/blk-cgroup.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index ce5858dadca5..3ee4c1217b63 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -1360,6 +1360,10 @@ int blkcg_activate_policy(struct request_queue *q, list_for_each_entry_reverse(blkg, &q->blkg_list, q_node) pol->pd_init_fn(blkg->pd[pol->plid]); + if (pol->pd_online_fn) + list_for_each_entry_reverse(blkg, &q->blkg_list, q_node) + pol->pd_online_fn(blkg->pd[pol->plid]); + __set_bit(pol->plid, q->blkcg_pols); ret = 0; -- 2.39.0