From patchwork Mon Oct 18 18:39:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Shtylyov X-Patchwork-Id: 12567715 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23F94C433EF for ; Mon, 18 Oct 2021 18:39:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1281361212 for ; Mon, 18 Oct 2021 18:39:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233560AbhJRSmE (ORCPT ); Mon, 18 Oct 2021 14:42:04 -0400 Received: from mxout01.lancloud.ru ([45.84.86.81]:52906 "EHLO mxout01.lancloud.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229924AbhJRSlu (ORCPT ); Mon, 18 Oct 2021 14:41:50 -0400 Received: from LanCloud DKIM-Filter: OpenDKIM Filter v2.11.0 mxout01.lancloud.ru 2D18D207135B Received: from LanCloud Received: from LanCloud Received: from LanCloud From: Sergey Shtylyov To: , Alan Stern , "Greg Kroah-Hartman" CC: Krzysztof Kozlowski , , Subject: [PATCH 10/22] usb: host: ohci-exynos: deny IRQ0 Date: Mon, 18 Oct 2021 21:39:18 +0300 Message-ID: <20211018183930.8448-11-s.shtylyov@omp.ru> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20211018183930.8448-1-s.shtylyov@omp.ru> References: <20211018183930.8448-1-s.shtylyov@omp.ru> MIME-Version: 1.0 X-Originating-IP: [192.168.11.198] X-ClientProxiedBy: LFEXT01.lancloud.ru (fd00:f066::141) To LFEX1907.lancloud.ru (fd00:f066::207) Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org If platform_get_irq() returns IRQ0 (considered invalid according to Linus) the driver blithely passes it to usb_add_hcd() that treats IRQ0 as no IRQ at all. Deny IRQ0 right away, returning -EINVAL from the probe() method... Fixes: 1d4169834628 ("usb: host: ohci-exynos: Fix error handling in exynos_ohci_probe()") Signed-off-by: Sergey Shtylyov --- drivers/usb/host/ohci-exynos.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c index 5f5e8a64c8e2..f28f28e42f43 100644 --- a/drivers/usb/host/ohci-exynos.c +++ b/drivers/usb/host/ohci-exynos.c @@ -175,6 +175,10 @@ static int exynos_ohci_probe(struct platform_device *pdev) err = irq; goto fail_io; } + if (!irq) { + err = -EINVAL; + goto fail_io; + } platform_set_drvdata(pdev, hcd);