From patchwork Mon Mar 29 20:19:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Shtylyov X-Patchwork-Id: 411104 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=-15.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, USER_AGENT_SANE_1 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 2C400C433C1 for ; Mon, 29 Mar 2021 20:20:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F250D61987 for ; Mon, 29 Mar 2021 20:20:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230346AbhC2UUG (ORCPT ); Mon, 29 Mar 2021 16:20:06 -0400 Received: from mxout04.lancloud.ru ([45.84.86.114]:35976 "EHLO mxout04.lancloud.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231967AbhC2UTv (ORCPT ); Mon, 29 Mar 2021 16:19:51 -0400 Received: from LanCloud DKIM-Filter: OpenDKIM Filter v2.11.0 mxout04.lancloud.ru 1ADE52131923 Received: from LanCloud Received: from LanCloud Received: from LanCloud Subject: [PATCH v2 3/3] scsi: sni_53c710: fix IRQ check From: Sergey Shtylyov To: "James E.J. Bottomley" , "Martin K. Petersen" , References: Organization: Open Mobile Platform, LLC Message-ID: Date: Mon, 29 Mar 2021 23:19:48 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Originating-IP: [192.168.11.198] X-ClientProxiedBy: LFEXT02.lancloud.ru (fd00:f066::142) To LFEX1908.lancloud.ru (fd00:f066::208) Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The driver neglects to check the result of platform_get_irq()'s call and blithely passes the negative error codes to request_irq() (which takes *unsigned* IRQ #s), causing it to fail with -EINVAL (overridden by -ENODEV further below). Stop calling request_irq() with the invalid IRQ #s. Fixes: c27d85f3f3c5 ("[SCSI] SNI RM 53c710 driver") Signed-off-by: Sergey Shtylyov --- Changes in version 2: - new patch. drivers/scsi/sni_53c710.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) Index: scsi/drivers/scsi/sni_53c710.c =================================================================== --- scsi.orig/drivers/scsi/sni_53c710.c +++ scsi/drivers/scsi/sni_53c710.c @@ -58,6 +58,7 @@ static int snirm710_probe(struct platfor struct NCR_700_Host_Parameters *hostdata; struct Scsi_Host *host; struct resource *res; + int rc; res = platform_get_resource(dev, IORESOURCE_MEM, 0); if (!res) @@ -83,7 +84,9 @@ static int snirm710_probe(struct platfor goto out_kfree; host->this_id = 7; host->base = base; - host->irq = platform_get_irq(dev, 0); + host->irq = rc = platform_get_irq(dev, 0); + if (rc < 0) + goto out_put_host; if(request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "snirm710", host)) { printk(KERN_ERR "snirm710: request_irq failed!\n"); goto out_put_host;