From nobody Fri Feb 13 14:11:30 2026 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 A4ADDCE7A89 for ; Sat, 23 Sep 2023 15:40:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231948AbjIWPkE (ORCPT ); Sat, 23 Sep 2023 11:40:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229946AbjIWPkD (ORCPT ); Sat, 23 Sep 2023 11:40:03 -0400 X-Greylist: delayed 902 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Sat, 23 Sep 2023 08:39:54 PDT Received: from m15.mail.163.com (m15.mail.163.com [45.254.50.219]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 9BB5010C for ; Sat, 23 Sep 2023 08:39:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id; bh=SHF1YmrFCIJnQPO4SO EuTOBqKGbDRVpdwSQop0QEt0s=; b=NmAUw/UVzmmSzpHBGJCvJCmcCa+IUgIoXz 43TqUY58E+Amtv4Ch26cmFArlE6j7An0nbeCyZK0TmA8vSxLa5/5dP2S/R5msBoU r3aQoRRBwqE5HHEahIfb+6CTNwfF+4hryAmZ8ay27N37WHRJ79KSVa9b3bFuiJ50 uI+2egXQ4= Received: from localhost.localdomain (unknown [223.104.131.178]) by zwqz-smtp-mta-g2-2 (Coremail) with SMTP id _____wA3SD8rAw9lJi+ICw--.49026S2; Sat, 23 Sep 2023 23:24:29 +0800 (CST) From: liuhaoran To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, liuhaoran Subject: [PATCH] arm: kernel: Add error handling in get_dma_residue() Date: Sat, 23 Sep 2023 23:24:15 +0800 Message-Id: <20230923152415.41073-1-liuhaoran14@163.com> X-Mailer: git-send-email 2.17.1 X-CM-TRANSID: _____wA3SD8rAw9lJi+ICw--.49026S2 X-Coremail-Antispam: 1Uf129KBjvdXoWrWr4fXr17tr1DXrWrtr45Awb_yoWxXrcEqr 4xtw4kWrn5ZFZF9r15Ca1fGrnxt3s8KFyFgwnFqFy7J34DXw15Wwn0van7ZF1kJFnFkFZ3 CFWUJFZ3tw1v9jkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xREHqc7UUUUU== X-Originating-IP: [223.104.131.178] X-CM-SenderInfo: xolxxtxrud0iqu6rljoofrz/1tbiGALzglv2oALsuAABsx Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This patch adds error-handling for the dma_channel() inside the get_dma_residue(). Signed-off-by: liuhaoran --- arch/arm/kernel/dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/kernel/dma.c b/arch/arm/kernel/dma.c index ba15b8666498..80b3e3506cfa 100644 --- a/arch/arm/kernel/dma.c +++ b/arch/arm/kernel/dma.c @@ -253,7 +253,7 @@ int get_dma_residue(unsigned int chan) dma_t *dma =3D dma_channel(chan); int ret =3D 0; =20 - if (dma->d_ops->residue) + if (dma && dma->d_ops->residue) ret =3D dma->d_ops->residue(chan, dma); =20 return ret; --=20 2.17.1