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=-14.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 DFDD5C433E1 for ; Thu, 27 Aug 2020 18:25:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C0A8B2087E for ; Thu, 27 Aug 2020 18:25:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598552715; bh=Z0fq8dm88+dU9bSyD1/ti5vEZonGfauWaztGQMRRjv4=; h=From:To:Cc:Subject:Date:List-ID:From; b=CvRGYJM1OO5f9ZTj9P4DcrgXdgBwVAwaymCSMB6qtUuhynvmQmi/BF0FIHEyzu/P5 6dIcNNyBdfHIghjbz2rI8FnJZI7FP0k0dRjJBA14kDsOAkP9OsaPzHEkVOirZcAWIJ isyvBC9mv+gMvz5na33wfffiMPTdpLiJZT93Aeps= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726828AbgH0SZO (ORCPT ); Thu, 27 Aug 2020 14:25:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:33540 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726197AbgH0SZN (ORCPT ); Thu, 27 Aug 2020 14:25:13 -0400 Received: from localhost.localdomain (unknown [194.230.155.216]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 834FE2087C; Thu, 27 Aug 2020 18:25:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598552713; bh=Z0fq8dm88+dU9bSyD1/ti5vEZonGfauWaztGQMRRjv4=; h=From:To:Cc:Subject:Date:From; b=IwTyGYXlnbFOhjBVfmnr32F+ohdbcGf6mHx2E6En0fwR5qRBHq9yO91+/S6zv2h0w 4+NDrFOePMEVUsNYcT3MvpBJoxWD+XLp4nmvr2ulQcvggxIVrcUxRGGgOk39RdthS2 ksaZ/x2Y9mvHGkvPkj4TIMDEonMo0PEZr+dfXpt8= From: Krzysztof Kozlowski To: Jassi Brar , Matthias Brugger , CK Hu , HS Liao , Houlong Wei , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Cc: Frank Wunderlich , Krzysztof Kozlowski Subject: [PATCH v3] mailbox: mediatek: Fix handling of platform_get_irq() error Date: Thu, 27 Aug 2020 20:25:07 +0200 Message-Id: <20200827182507.4938-1-krzk@kernel.org> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org platform_get_irq() returns -ERRNO on error. In such case casting to u32 and comparing to 0 would pass the check. Fixes: 623a6143a845 ("mailbox: mediatek: Add Mediatek CMDQ driver") Signed-off-by: Krzysztof Kozlowski --- Changes since v2: 1. Fix subject. Changes since v1: 1. Correct u32->int, 2. Fix left-over '!'. --- drivers/mailbox/mtk-cmdq-mailbox.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index 484d4438cd83..5665b6ea8119 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -69,7 +69,7 @@ struct cmdq_task { struct cmdq { struct mbox_controller mbox; void __iomem *base; - u32 irq; + int irq; u32 thread_nr; u32 irq_mask; struct cmdq_thread *thread; @@ -525,10 +525,8 @@ static int cmdq_probe(struct platform_device *pdev) } cmdq->irq = platform_get_irq(pdev, 0); - if (!cmdq->irq) { - dev_err(dev, "failed to get irq\n"); - return -EINVAL; - } + if (cmdq->irq < 0) + return cmdq->irq; plat_data = (struct gce_plat *)of_device_get_match_data(dev); if (!plat_data) { -- 2.17.1