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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 5A694C32751 for ; Tue, 6 Aug 2019 09:41:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3248A2147A for ; Tue, 6 Aug 2019 09:41:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732547AbfHFJlA (ORCPT ); Tue, 6 Aug 2019 05:41:00 -0400 Received: from mga01.intel.com ([192.55.52.88]:49741 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726713AbfHFJlA (ORCPT ); Tue, 6 Aug 2019 05:41:00 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Aug 2019 02:41:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,353,1559545200"; d="scan'208";a="179104035" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga006.jf.intel.com with ESMTP; 06 Aug 2019 02:40:58 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id DE8C0445; Tue, 6 Aug 2019 12:40:55 +0300 (EEST) From: Andy Shevchenko To: Vinod Koul , dmaengine@vger.kernel.org, Viresh Kumar Cc: Andy Shevchenko Subject: [PATCH v1 09/12] dmaengine: dw: platform: Switch to acpi_dma_controller_register() Date: Tue, 6 Aug 2019 12:40:51 +0300 Message-Id: <20190806094054.64871-9-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190806094054.64871-1-andriy.shevchenko@linux.intel.com> References: <20190806094054.64871-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org There is a possibility to have registered ACPI DMA controller while it has been gone already. To avoid the potential crash, move to non-managed acpi_dma_controller_register(). Fixes: 42c91ee71d6d ("dw_dmac: add ACPI support") Signed-off-by: Andy Shevchenko --- drivers/dma/dw/platform.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c index 45cf47ca922f..ea096cf6ee2b 100644 --- a/drivers/dma/dw/platform.c +++ b/drivers/dma/dw/platform.c @@ -84,13 +84,20 @@ static void dw_dma_acpi_controller_register(struct dw_dma *dw) dma_cap_set(DMA_SLAVE, info->dma_cap); info->filter_fn = dw_dma_acpi_filter; - ret = devm_acpi_dma_controller_register(dev, acpi_dma_simple_xlate, - info); + ret = acpi_dma_controller_register(dev, acpi_dma_simple_xlate, info); if (ret) dev_err(dev, "could not register acpi_dma_controller\n"); } + +static void dw_dma_acpi_controller_free(struct dw_dma *dw) +{ + struct device *dev = dw->dma.dev; + + acpi_dma_controller_free(dev); +} #else /* !CONFIG_ACPI */ static inline void dw_dma_acpi_controller_register(struct dw_dma *dw) {} +static inline void dw_dma_acpi_controller_free(struct dw_dma *dw) {} #endif /* !CONFIG_ACPI */ #ifdef CONFIG_OF @@ -249,6 +256,9 @@ static int dw_remove(struct platform_device *pdev) struct dw_dma_chip *chip = data->chip; int ret; + if (ACPI_HANDLE(&pdev->dev)) + dw_dma_acpi_controller_free(chip->dw); + if (pdev->dev.of_node) of_dma_controller_free(pdev->dev.of_node); -- 2.20.1