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 41B82C678DB for ; Tue, 7 Mar 2023 18:13:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232504AbjCGSNm (ORCPT ); Tue, 7 Mar 2023 13:13:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57958 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232287AbjCGSNX (ORCPT ); Tue, 7 Mar 2023 13:13:23 -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 85DBA9FBD2 for ; Tue, 7 Mar 2023 10:08:58 -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 2588861522 for ; Tue, 7 Mar 2023 18:08:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1A811C433D2; Tue, 7 Mar 2023 18:08:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678212537; bh=22RhO7UPtlr+oCAFVwq8zNtDAAQZrq9bqtDoPexuugM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=w4B2ENaVNQUmX92EJYPFixxweajZcu6L5PwzQRrHrWPDO4JT5fSwsHioHNrKtxf4t Xx30xI3OEMWTL4LgfUY3FUXQJp8MpSeb+pLGMcnQbvDiMMPBdjPxQ+51dIV00tpXfE PQfWWII3Z2YnEVrqLC2lRFtnUvLahdjQLVMJSftM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Vladis Dronov , Koba Ko , Tom Lendacky , Herbert Xu , Sasha Levin Subject: [PATCH 6.1 175/885] crypto: ccp - Failure on re-initialization due to duplicate sysfs filename Date: Tue, 7 Mar 2023 17:51:49 +0100 Message-Id: <20230307170009.562424575@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230307170001.594919529@linuxfoundation.org> References: <20230307170001.594919529@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Koba Ko [ Upstream commit 299bf602b3f92f1456aef59c6413591fb02e762a ] The following warning appears during the CCP module re-initialization: [ 140.965403] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:07.1/0000:03:00.2/dma/dma0chan0' [ 140.975736] CPU: 0 PID: 388 Comm: kworker/0:2 Kdump: loaded Not tainted 6.2.0-0.rc2.18.eln124.x86_64 #1 [ 140.985185] Hardware name: HPE ProLiant DL325 Gen10/ProLiant DL325 Gen10, BIOS A41 07/17/2020 [ 140.993761] Workqueue: events work_for_cpu_fn [ 140.998151] Call Trace: [ 141.000613] [ 141.002726] dump_stack_lvl+0x33/0x46 [ 141.006415] sysfs_warn_dup.cold+0x17/0x23 [ 141.010542] sysfs_create_dir_ns+0xba/0xd0 [ 141.014670] kobject_add_internal+0xba/0x260 [ 141.018970] kobject_add+0x81/0xb0 [ 141.022395] device_add+0xdc/0x7e0 [ 141.025822] ? complete_all+0x20/0x90 [ 141.029510] __dma_async_device_channel_register+0xc9/0x130 [ 141.035119] dma_async_device_register+0x19e/0x3b0 [ 141.039943] ccp_dmaengine_register+0x334/0x3f0 [ccp] [ 141.045042] ccp5_init+0x662/0x6a0 [ccp] [ 141.049000] ? devm_kmalloc+0x40/0xd0 [ 141.052688] ccp_dev_init+0xbb/0xf0 [ccp] [ 141.056732] ? __pci_set_master+0x56/0xd0 [ 141.060768] sp_init+0x70/0x90 [ccp] [ 141.064377] sp_pci_probe+0x186/0x1b0 [ccp] [ 141.068596] local_pci_probe+0x41/0x80 [ 141.072374] work_for_cpu_fn+0x16/0x20 [ 141.076145] process_one_work+0x1c8/0x380 [ 141.080181] worker_thread+0x1ab/0x380 [ 141.083953] ? __pfx_worker_thread+0x10/0x10 [ 141.088250] kthread+0xda/0x100 [ 141.091413] ? __pfx_kthread+0x10/0x10 [ 141.095185] ret_from_fork+0x2c/0x50 [ 141.098788] [ 141.100996] kobject_add_internal failed for dma0chan0 with -EEXIST, don't try to register things with the same name in the same directory. [ 141.113703] ccp 0000:03:00.2: ccp initialization failed The /dma/dma0chan0 sysfs file is not removed since dma_chan object has been released in ccp_dma_release() before releasing dma device. A correct procedure would be: release dma channels first => unregister dma device => release ccp dma object. Link: https://bugzilla.kernel.org/show_bug.cgi?id=216888 Fixes: 68dbe80f5b51 ("crypto: ccp - Release dma channels before dmaengine unrgister") Tested-by: Vladis Dronov Signed-off-by: Koba Ko Reviewed-by: Vladis Dronov Acked-by: Tom Lendacky Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/crypto/ccp/ccp-dmaengine.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/drivers/crypto/ccp/ccp-dmaengine.c b/drivers/crypto/ccp/ccp-dmaengine.c index 9f753cb4f5f18..b386a7063818b 100644 --- a/drivers/crypto/ccp/ccp-dmaengine.c +++ b/drivers/crypto/ccp/ccp-dmaengine.c @@ -642,14 +642,26 @@ static void ccp_dma_release(struct ccp_device *ccp) chan = ccp->ccp_dma_chan + i; dma_chan = &chan->dma_chan; - if (dma_chan->client_count) - dma_release_channel(dma_chan); - tasklet_kill(&chan->cleanup_tasklet); list_del_rcu(&dma_chan->device_node); } } +static void ccp_dma_release_channels(struct ccp_device *ccp) +{ + struct ccp_dma_chan *chan; + struct dma_chan *dma_chan; + unsigned int i; + + for (i = 0; i < ccp->cmd_q_count; i++) { + chan = ccp->ccp_dma_chan + i; + dma_chan = &chan->dma_chan; + + if (dma_chan->client_count) + dma_release_channel(dma_chan); + } +} + int ccp_dmaengine_register(struct ccp_device *ccp) { struct ccp_dma_chan *chan; @@ -770,8 +782,9 @@ void ccp_dmaengine_unregister(struct ccp_device *ccp) if (!dmaengine) return; - ccp_dma_release(ccp); + ccp_dma_release_channels(ccp); dma_async_device_unregister(dma_dev); + ccp_dma_release(ccp); kmem_cache_destroy(ccp->dma_desc_cache); kmem_cache_destroy(ccp->dma_cmd_cache); -- 2.39.2