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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 14587C63798 for ; Fri, 20 Nov 2020 14:34:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A435C2224C for ; Fri, 20 Nov 2020 14:34:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="HKy1giFa" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727907AbgKTOdo (ORCPT ); Fri, 20 Nov 2020 09:33:44 -0500 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:51274 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726255AbgKTOdn (ORCPT ); Fri, 20 Nov 2020 09:33:43 -0500 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0AKEW42p018604; Fri, 20 Nov 2020 15:33:29 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=2CM4NCa/CuP7klYZNKzVeHsDDN4tvYCHKHpkT+tePN8=; b=HKy1giFa6V4VB353LW3+rD6EdT20SS3QdDPJeyB5Ur3qFqZtuspzMPzSni43wUu7Wy3z DVSnLKhmauuYb+25mXBug6kG2U/Ac1JmkCQNkXwFELbJeE56MEqLOdeEdcWOfNaXP2Am XE7KrnFIO3fod+aYY8ZaKpZJ8LUeYot1oL3pZQYEEnomfqm1jncLU90G0MWYFQwM2RHS 3Xfo+zTO83v7jLLYRw77+xaTpr2HzA3hnU16KjWL9YaCmlYo3TJXCxVKahEqw1ZwqBQ4 9mQ0x/bwkciixr22uMk8PYNRBhC/VhCv0AUHtvd+ta9eIzodugIDNNW6FISTul3Hjh/z fw== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 34t70h7n0e-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 20 Nov 2020 15:33:29 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id A38F010002A; Fri, 20 Nov 2020 15:33:28 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 970A92777DE; Fri, 20 Nov 2020 15:33:28 +0100 (CET) Received: from localhost (10.75.127.46) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 20 Nov 2020 15:33:28 +0100 From: Amelie Delaunay To: Vinod Koul , Dan Williams , Maxime Coquelin , Alexandre Torgue CC: , , , , Amelie Delaunay , Pierre-Yves MORDRET Subject: [PATCH 2/4] dmaengine: stm32-dma: clean channel configuration when channel is freed Date: Fri, 20 Nov 2020 15:33:18 +0100 Message-ID: <20201120143320.30367-3-amelie.delaunay@st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201120143320.30367-1-amelie.delaunay@st.com> References: <20201120143320.30367-1-amelie.delaunay@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.75.127.46] X-ClientProxiedBy: SFHDAG3NODE1.st.com (10.75.127.7) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-11-20_07:2020-11-20,2020-11-20 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When dma_channel_release is called, it means that the channel won't be used anymore with the configuration it had. To ensure a future client can safely use the channel after it has been released, clean the configuration done when channel was requested. Signed-off-by: Amelie Delaunay --- drivers/dma/stm32-dma.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index 55a6bd381219..62501e5d9e9d 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -1220,6 +1220,8 @@ static void stm32_dma_free_chan_resources(struct dma_chan *c) pm_runtime_put(dmadev->ddev.dev); vchan_free_chan_resources(to_virt_chan(c)); + stm32_dma_clear_reg(&chan->chan_reg); + chan->threshold = 0; } static void stm32_dma_desc_free(struct virt_dma_desc *vdesc) -- 2.17.1