From patchwork Tue Apr 26 08:20:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 568040 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 CD646C433F5 for ; Tue, 26 Apr 2022 08:25:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239104AbiDZI2m (ORCPT ); Tue, 26 Apr 2022 04:28:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36432 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344828AbiDZI1t (ORCPT ); Tue, 26 Apr 2022 04:27:49 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F1623B00D; Tue, 26 Apr 2022 01:23:57 -0700 (PDT) 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 ams.source.kernel.org (Postfix) with ESMTPS id 426ECB81CF5; Tue, 26 Apr 2022 08:23:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 96354C385A4; Tue, 26 Apr 2022 08:23:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650961435; bh=d4jCmASu9EKrvewEvtP/pAH79Q1mTSWiBtjlW4+Aqck=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pTMxkSd44IRyTVqQkcvFV1Dt3O7rQpJVygdrROZNIvSgDh4Y+qKOa7B/cBQQJvrZE SeIXDORqxQGm/JeE0g3FTgzIMDDHy4clo+tbrkgmjwq0sxdx6H1lxWTxfpp+rYMWkB q/MI3ckv4ynmEArkAoJGVj/UwZmkXemE0HFz7gOs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Miaoqian Lin , Vinod Koul , Sasha Levin Subject: [PATCH 4.14 10/43] dmaengine: imx-sdma: Fix error checking in sdma_event_remap Date: Tue, 26 Apr 2022 10:20:52 +0200 Message-Id: <20220426081734.820953385@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220426081734.509314186@linuxfoundation.org> References: <20220426081734.509314186@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Miaoqian Lin [ Upstream commit 7104b9cb35a33ad803a1adbbfa50569b008faf15 ] of_parse_phandle() returns NULL on errors, rather than error pointers. Using NULL check on grp_np to fix this. Fixes: d078cd1b4185 ("dmaengine: imx-sdma: Add imx6sx platform support") Signed-off-by: Miaoqian Lin Link: https://lore.kernel.org/r/20220308064952.15743-1-linmq006@gmail.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/dma/imx-sdma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 99f3f22ed647..02d13a44ba45 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -1528,7 +1528,7 @@ static int sdma_event_remap(struct sdma_engine *sdma) u32 reg, val, shift, num_map, i; int ret = 0; - if (IS_ERR(np) || IS_ERR(gpr_np)) + if (IS_ERR(np) || !gpr_np) goto out; event_remap = of_find_property(np, propname, NULL); @@ -1576,7 +1576,7 @@ static int sdma_event_remap(struct sdma_engine *sdma) } out: - if (!IS_ERR(gpr_np)) + if (gpr_np) of_node_put(gpr_np); return ret;