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=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 91471C12002 for ; Mon, 19 Jul 2021 14:59:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7BC0E61073 for ; Mon, 19 Jul 2021 14:59:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242188AbhGSOS4 (ORCPT ); Mon, 19 Jul 2021 10:18:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:53094 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242017AbhGSOSK (ORCPT ); Mon, 19 Jul 2021 10:18:10 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C1F4F61164; Mon, 19 Jul 2021 14:58:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626706730; bh=1lYLeTgNQJM2d5pmWy+rC3KLcs4gGOmYby3BAeXihoI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X5i2sQ8Q1KhOCOnlpjgfreIol/8fmoyDm3uJstJyZJj0o9xMwDp3n5APA5TEoS1/E Nm/Zj6htRD2QwsalmDfXBdfD4hO/yo79C9EKkpKhyPS0vtPxBVNifQQReOp0dlmmIx rCOXAevrNAGU/JsoRfNCSvu5LHBpE/Mvk18a/C0o= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pavel Skripkin , "David S. Miller" , Sasha Levin Subject: [PATCH 4.4 072/188] net: ethernet: ezchip: fix error handling Date: Mon, 19 Jul 2021 16:50:56 +0200 Message-Id: <20210719144929.793162859@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144913.076563739@linuxfoundation.org> References: <20210719144913.076563739@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: Pavel Skripkin [ Upstream commit 0de449d599594f5472e00267d651615c7f2c6c1d ] As documented at drivers/base/platform.c for platform_get_irq: * Gets an IRQ for a platform device and prints an error message if finding the * IRQ fails. Device drivers should check the return value for errors so as to * not pass a negative integer value to the request_irq() APIs. So, the driver should check that platform_get_irq() return value is _negative_, not that it's equal to zero, because -ENXIO (return value from request_irq() if irq was not found) will pass this check and it leads to passing negative irq to request_irq() Fixes: 0dd077093636 ("NET: Add ezchip ethernet driver") Signed-off-by: Pavel Skripkin Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/ezchip/nps_enet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/ezchip/nps_enet.c b/drivers/net/ethernet/ezchip/nps_enet.c index 73d2bc349b2f..2cb20d8e6bdf 100644 --- a/drivers/net/ethernet/ezchip/nps_enet.c +++ b/drivers/net/ethernet/ezchip/nps_enet.c @@ -586,7 +586,7 @@ static s32 nps_enet_probe(struct platform_device *pdev) /* Get IRQ number */ priv->irq = platform_get_irq(pdev, 0); - if (!priv->irq) { + if (priv->irq < 0) { dev_err(dev, "failed to retrieve value from device tree\n"); err = -ENODEV; goto out_netdev; -- 2.30.2