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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 617C6C07E9E for ; Tue, 6 Jul 2021 11:26:09 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 35C6861ED5 for ; Tue, 6 Jul 2021 11:26:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 35C6861ED5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3C3BD6E442; Tue, 6 Jul 2021 11:26:08 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id B24BF6E43D; Tue, 6 Jul 2021 11:26:07 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id B21B761ECC; Tue, 6 Jul 2021 11:26:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625570767; bh=1W/bstbucNPe+USJhNe3o8RBL+LRH+w9EP++FNRD0ww=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=skXSGFhShE0s8jPFpcjFzBxFZXWEMICkiEmtg/EMUCDa0zF/+oVAMn3/jKx3wuage wcBWDWXUohZkGTC48fBtnriegkL0UHHcbtMbgrDoG6YSEL0xUADKaucvd9VIRALuGi mkBu03VKvtftZywxrumPDCQTw/RJGwUYSkXqFsukqmqFEDLYTxjbz20kHmW1ibGikr pFrG41bqcBmyeaab4uayXJ657ISus/LYvlTDWbq23ojr6SSbD4Bd5fNoYeZ9EQMCKF mHhQwJiVRD6dFIMrQF1+6wC/zrrqi4O0XfeFkQw/fbN6RixPY+PEbt35zKBFSrs2Ue WdfqhOpiXMgcQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 51/74] drm/amdkfd: Walk through list with dqm lock hold Date: Tue, 6 Jul 2021 07:24:39 -0400 Message-Id: <20210706112502.2064236-51-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210706112502.2064236-1-sashal@kernel.org> References: <20210706112502.2064236-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , Felix Kuehling , xinhui pan , dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, Alex Deucher Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: xinhui pan [ Upstream commit 56f221b6389e7ab99c30bbf01c71998ae92fc584 ] To avoid any list corruption. Signed-off-by: xinhui pan Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- .../drm/amd/amdkfd/kfd_device_queue_manager.c | 22 ++++++++++--------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c index ab69898c9cb7..723ec6c2830d 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c @@ -1584,7 +1584,7 @@ static int process_termination_cpsch(struct device_queue_manager *dqm, struct qcm_process_device *qpd) { int retval; - struct queue *q, *next; + struct queue *q; struct kernel_queue *kq, *kq_next; struct mqd_manager *mqd_mgr; struct device_process_node *cur, *next_dpn; @@ -1639,24 +1639,26 @@ static int process_termination_cpsch(struct device_queue_manager *dqm, qpd->reset_wavefronts = false; } - dqm_unlock(dqm); - - /* Outside the DQM lock because under the DQM lock we can't do - * reclaim or take other locks that others hold while reclaiming. - */ - if (found) - kfd_dec_compute_active(dqm->dev); - /* Lastly, free mqd resources. * Do free_mqd() after dqm_unlock to avoid circular locking. */ - list_for_each_entry_safe(q, next, &qpd->queues_list, list) { + while (!list_empty(&qpd->queues_list)) { + q = list_first_entry(&qpd->queues_list, struct queue, list); mqd_mgr = dqm->mqd_mgrs[get_mqd_type_from_queue_type( q->properties.type)]; list_del(&q->list); qpd->queue_count--; + dqm_unlock(dqm); mqd_mgr->free_mqd(mqd_mgr, q->mqd, q->mqd_mem_obj); + dqm_lock(dqm); } + dqm_unlock(dqm); + + /* Outside the DQM lock because under the DQM lock we can't do + * reclaim or take other locks that others hold while reclaiming. + */ + if (found) + kfd_dec_compute_active(dqm->dev); return retval; } -- 2.30.2