From patchwork Wed Aug 10 07:01:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Naga Harish K, S V" X-Patchwork-Id: 114796 X-Patchwork-Delegate: jerinj@marvell.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id A1DE4A0540; Wed, 10 Aug 2022 09:01:56 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 951AC42BF0; Wed, 10 Aug 2022 09:01:56 +0200 (CEST) Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by mails.dpdk.org (Postfix) with ESMTP id B2B6940694; Wed, 10 Aug 2022 09:01:54 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1660114915; x=1691650915; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=33VvfmsAoJ4XPvlkory0HZbVzkt0OI4C+un26CDCBNU=; b=E9qCrNhYBZsGKKe9Sp3Sc8Hj2QuOJavLO1Upj8H/R8jpUl6AfJJHisY1 F6b4Byjp05ZvuJoUHDjcidNzgitPxJ6cZWLYn0dfasQJNuycV8ojqwO75 o2yRkuHkBtfRe58BoNWaju2+UaTtqtbgky/LzrQQgLz9kuz8D9fi2Ad7a lWa2E8mArgrWS73sk4MZQrWC+I2Lz6mvBDJktrP+Q9sRGLVJzQGhW9cGJ Nj52UMhKPhWrVbMz+y//xHvpneflhwcvPRyNx1JgtPMi6u+CvwZ4wH0R+ F2AgJk5Lq6E+VuvpcAvOMYg96xwxriBdkqrDy9HEMZ0PjIhs7w9mrBi+J Q==; X-IronPort-AV: E=McAfee;i="6400,9594,10434"; a="291803054" X-IronPort-AV: E=Sophos;i="5.93,226,1654585200"; d="scan'208";a="291803054" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Aug 2022 00:01:54 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,226,1654585200"; d="scan'208";a="581120033" Received: from txandevlnx322.an.intel.com ([10.123.117.44]) by orsmga006.jf.intel.com with ESMTP; 10 Aug 2022 00:01:54 -0700 From: Naga Harish K S V To: erik.g.carrillo@intel.com Cc: dev@dpdk.org, stable@dpdk.org Subject: [PATCH v2 3/4] timer: fix function to stop all timers Date: Wed, 10 Aug 2022 02:01:52 -0500 Message-Id: <20220810070152.3110530-1-s.v.naga.harish.k@intel.com> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org There is a possibility of deadlock in this API, as same spinlock is tried to be acquired in nested manner. In timer_del function, if the previous owner and current owner lcore are different, the lock is tried to be acquired even though the same lock is already acquired by the caller of timer_del function. This patch removes the acquisition of nested locking. Fixes: 821c51267bcd63a ("timer: add function to stop all timers in a list") Cc: stable@dpdk.org Signed-off-by: Naga Harish K S V --- lib/timer/rte_timer.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/lib/timer/rte_timer.c b/lib/timer/rte_timer.c index 9994813d0d..85d67573eb 100644 --- a/lib/timer/rte_timer.c +++ b/lib/timer/rte_timer.c @@ -580,7 +580,7 @@ rte_timer_reset_sync(struct rte_timer *tim, uint64_t ticks, } static int -__rte_timer_stop(struct rte_timer *tim, int local_is_locked, +__rte_timer_stop(struct rte_timer *tim, struct rte_timer_data *timer_data) { union rte_timer_status prev_status, status; @@ -602,7 +602,7 @@ __rte_timer_stop(struct rte_timer *tim, int local_is_locked, /* remove it from list */ if (prev_status.state == RTE_TIMER_PENDING) { - timer_del(tim, prev_status, local_is_locked, priv_timer); + timer_del(tim, prev_status, 0, priv_timer); __TIMER_STAT_ADD(priv_timer, pending, -1); } @@ -631,7 +631,7 @@ rte_timer_alt_stop(uint32_t timer_data_id, struct rte_timer *tim) TIMER_DATA_VALID_GET_OR_ERR_RET(timer_data_id, timer_data, -EINVAL); - return __rte_timer_stop(tim, 0, timer_data); + return __rte_timer_stop(tim, timer_data); } /* loop until rte_timer_stop() succeed */ @@ -987,21 +987,16 @@ rte_timer_stop_all(uint32_t timer_data_id, unsigned int *walk_lcores, walk_lcore = walk_lcores[i]; priv_timer = &timer_data->priv_timer[walk_lcore]; - rte_spinlock_lock(&priv_timer->list_lock); - for (tim = priv_timer->pending_head.sl_next[0]; tim != NULL; tim = next_tim) { next_tim = tim->sl_next[0]; - /* Call timer_stop with lock held */ - __rte_timer_stop(tim, 1, timer_data); + __rte_timer_stop(tim, timer_data); if (f) f(tim, f_arg); } - - rte_spinlock_unlock(&priv_timer->list_lock); } return 0;