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 3DA9BC43334 for ; Thu, 7 Jul 2022 13:14:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235166AbiGGNO3 (ORCPT ); Thu, 7 Jul 2022 09:14:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234888AbiGGNO2 (ORCPT ); Thu, 7 Jul 2022 09:14:28 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C06F248CE; Thu, 7 Jul 2022 06:14:27 -0700 (PDT) Received: from kwepemi500023.china.huawei.com (unknown [172.30.72.56]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4Ldxdw3NFtzkWq1; Thu, 7 Jul 2022 21:12:20 +0800 (CST) Received: from huawei.com (10.175.112.208) by kwepemi500023.china.huawei.com (7.221.188.76) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 7 Jul 2022 21:14:23 +0800 From: Peng Wu To: , , , CC: , , , Subject: [PATCH] PCI: endpoint: Fix a NULL vs IS_ERR() check in pci_epf_test_init_dma_chan() Date: Thu, 7 Jul 2022 13:12:15 +0000 Message-ID: <20220707131215.65075-1-wupeng58@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.175.112.208] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To kwepemi500023.china.huawei.com (7.221.188.76) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On failure, dma_request_channel() returns NULL and not a ERR_PTR() value. Fix return value checking by using is NULL. Signed-off-by: Peng Wu --- drivers/pci/endpoint/functions/pci-epf-test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index 34aac220dd4c..eed6638ab71d 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -221,7 +221,7 @@ static int pci_epf_test_init_dma_chan(struct pci_epf_test *epf_test) filter.dma_mask = BIT(DMA_MEM_TO_DEV); dma_chan = dma_request_channel(mask, epf_dma_filter_fn, &filter); - if (IS_ERR(dma_chan)) { + if (!dma_chan) { dev_info(dev, "Failed to get private DMA tx channel. Falling back to generic one\n"); goto fail_back_rx; } -- 2.17.1