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=-6.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 C2C22C5CFFE for ; Tue, 11 Dec 2018 15:46:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 885E52087F for ; Tue, 11 Dec 2018 15:46:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1544543186; bh=jM1ZnS6O/x00Y+CTfJujThYY02CVMuhWjH+s5A3xR/A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ZNhPVm/akqkzqrGxgjhagxpx4djzMbmeGQGjmGCja7UMJ6RReOiVYx8GdIPtqSIxQ VMspIqgJlaHFfHWSHelf9o6jZ9Qv9bk8woDBugnDEjLWlEVFoY8+3xBV2R6hL1i16W //2dj9LD+s88shTA08IG5MgD9Qf1AbYyHksqWooE= DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 885E52087F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728337AbeLKPqZ (ORCPT ); Tue, 11 Dec 2018 10:46:25 -0500 Received: from mail.kernel.org ([198.145.29.99]:34758 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728295AbeLKPqV (ORCPT ); Tue, 11 Dec 2018 10:46:21 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A631C20870; Tue, 11 Dec 2018 15:46:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1544543181; bh=jM1ZnS6O/x00Y+CTfJujThYY02CVMuhWjH+s5A3xR/A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dtpakc/jpGRgBjURp89z2XVamY98DB/oWFhRdm1BLsvWRet1T+DQ7obn/ct0tKfkZ l3KfqL2nad+PO0ofLOwsUMHQX71RbGCLyKqe5HNz28kVFn2M0tLPJrZcKMksTYozSe +ZENHZfiZRHJHnSQYbcK1TWXjv50ryCo0U1ORXYw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ludovic Desroches , Richard Genoud , Vinod Koul Subject: [PATCH 4.4 16/91] dmaengine: at_hdmac: fix module unloading Date: Tue, 11 Dec 2018 16:40:35 +0100 Message-Id: <20181211151607.203912382@linuxfoundation.org> X-Mailer: git-send-email 2.20.0 In-Reply-To: <20181211151606.026852373@linuxfoundation.org> References: <20181211151606.026852373@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Richard Genoud commit 77e75fda94d2ebb86aa9d35fb1860f6395bf95de upstream. of_dma_controller_free() was not called on module onloading. This lead to a soft lockup: watchdog: BUG: soft lockup - CPU#0 stuck for 23s! Modules linked in: at_hdmac [last unloaded: at_hdmac] when of_dma_request_slave_channel() tried to call ofdma->of_dma_xlate(). Cc: stable@vger.kernel.org Fixes: bbe89c8e3d59 ("at_hdmac: move to generic DMA binding") Acked-by: Ludovic Desroches Signed-off-by: Richard Genoud Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman --- drivers/dma/at_hdmac.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -2152,6 +2152,8 @@ static int at_dma_remove(struct platform struct resource *io; at_dma_off(atdma); + if (pdev->dev.of_node) + of_dma_controller_free(pdev->dev.of_node); dma_async_device_unregister(&atdma->dma_common); dma_pool_destroy(atdma->memset_pool);