From patchwork Tue Apr 5 07:19:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 557665 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 95D0CC35276 for ; Tue, 5 Apr 2022 09:13:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245434AbiDEJLu (ORCPT ); Tue, 5 Apr 2022 05:11:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51012 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244716AbiDEIwf (ORCPT ); Tue, 5 Apr 2022 04:52:35 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6CED31705A; Tue, 5 Apr 2022 01:42:27 -0700 (PDT) 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 07B986117A; Tue, 5 Apr 2022 08:42:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 13179C385A1; Tue, 5 Apr 2022 08:42:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649148146; bh=QdZzKpYR0Ak0Jkw0efMXTY/uKg67msQsuJfRVbPyVW4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eSkkqc+jHI3C2me6fhr0oC5VnrhTN74dSo04TOaHbt7X9ooODrYQ5Qqyfx8ipvATY l0lD04uBewF+hRuWEeF65w6pFlorX+WnBOUGu8Y43EC5W088zV0hUHsfNk4drMLfrG WkWfZQb64aYuItRSTIWiIuP5/T/c5q5/C0/+1IDY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?utf-8?b?RMSBdmlzIE1vc8SBbnM=?= , John Allen , Herbert Xu , Sasha Levin Subject: [PATCH 5.16 0250/1017] crypto: ccp - ccp_dmaengine_unregister release dma channels Date: Tue, 5 Apr 2022 09:19:23 +0200 Message-Id: <20220405070401.682234856@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220405070354.155796697@linuxfoundation.org> References: <20220405070354.155796697@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dāvis Mosāns [ Upstream commit 54cce8ecb9254f971b40a72911c6da403720a2d2 ] ccp_dmaengine_register adds dma_chan->device_node to dma_dev->channels list but ccp_dmaengine_unregister didn't remove them. That can cause crashes in various dmaengine methods that tries to use dma_dev->channels Fixes: 58ea8abf4904 ("crypto: ccp - Register the CCP as a DMA...") Signed-off-by: Dāvis Mosāns Acked-by: John Allen Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/crypto/ccp/ccp-dmaengine.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/crypto/ccp/ccp-dmaengine.c b/drivers/crypto/ccp/ccp-dmaengine.c index d718db224be4..7d4b4ad1db1f 100644 --- a/drivers/crypto/ccp/ccp-dmaengine.c +++ b/drivers/crypto/ccp/ccp-dmaengine.c @@ -632,6 +632,20 @@ static int ccp_terminate_all(struct dma_chan *dma_chan) return 0; } +static void ccp_dma_release(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; + tasklet_kill(&chan->cleanup_tasklet); + list_del_rcu(&dma_chan->device_node); + } +} + int ccp_dmaengine_register(struct ccp_device *ccp) { struct ccp_dma_chan *chan; @@ -736,6 +750,7 @@ int ccp_dmaengine_register(struct ccp_device *ccp) return 0; err_reg: + ccp_dma_release(ccp); kmem_cache_destroy(ccp->dma_desc_cache); err_cache: @@ -752,6 +767,7 @@ void ccp_dmaengine_unregister(struct ccp_device *ccp) return; dma_async_device_unregister(dma_dev); + ccp_dma_release(ccp); kmem_cache_destroy(ccp->dma_desc_cache); kmem_cache_destroy(ccp->dma_cmd_cache);