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 5FF13C4167D for ; Mon, 24 Jan 2022 23:57:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2366224AbiAXXwb (ORCPT ); Mon, 24 Jan 2022 18:52:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49608 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1845355AbiAXXMI (ORCPT ); Mon, 24 Jan 2022 18:12:08 -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 B04DEC067A44; Mon, 24 Jan 2022 13:19:02 -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 4FC7761469; Mon, 24 Jan 2022 21:19:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 29807C340E5; Mon, 24 Jan 2022 21:19:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643059141; bh=QGCFPH1WYvDgr9p4O+VQEVXKCX82xetHO6mmGWOWw2M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=swGStBzQ+zlmn9eToWmrcllx0TqZ2ZFgOQxv14PT+sPSTDzOCB2aDbEOhSzpf8FlN uOG0nd7gWda3gmmoMblf62BvdTeui2hmoYOvAdcuxNHRoyHFvDGcxXzje7Kww7Jjlg vf7/qwMWchZk+D0ROlZSXCfbUVMd7/GfZSrZYHHM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jiasheng Jiang , Sasha Levin Subject: [PATCH 5.16 0474/1039] uio: uio_dmem_genirq: Catch the Exception Date: Mon, 24 Jan 2022 19:37:43 +0100 Message-Id: <20220124184141.205188392@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184125.121143506@linuxfoundation.org> References: <20220124184125.121143506@linuxfoundation.org> User-Agent: quilt/0.66 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: Jiasheng Jiang [ Upstream commit eec91694f927d1026974444eb6a3adccd4f1cbc2 ] The return value of dma_set_coherent_mask() is not always 0. To catch the exception in case that dma is not support the mask. Fixes: 0a0c3b5a24bd ("Add new uio device for dynamic memory allocation") Signed-off-by: Jiasheng Jiang Link: https://lore.kernel.org/r/20211204000326.1592687-1-jiasheng@iscas.ac.cn Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/uio/uio_dmem_genirq.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c index 6b5cfa5b06733..1106f33764047 100644 --- a/drivers/uio/uio_dmem_genirq.c +++ b/drivers/uio/uio_dmem_genirq.c @@ -188,7 +188,11 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev) return -ENOMEM; } - dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); + ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); + if (ret) { + dev_err(&pdev->dev, "DMA enable failed\n"); + return ret; + } priv->uioinfo = uioinfo; spin_lock_init(&priv->lock); -- 2.34.1