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=-19.4 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=unavailable 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 80CA2C18E7B for ; Wed, 12 May 2021 16:28:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4B27361285 for ; Wed, 12 May 2021 16:28:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236119AbhELQ2Z (ORCPT ); Wed, 12 May 2021 12:28:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:55290 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231656AbhELPiz (ORCPT ); Wed, 12 May 2021 11:38:55 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BD5C361C60; Wed, 12 May 2021 15:20:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620832827; bh=zc8zZmSbGv0fbHbctOE8oi5ff/COuMFjxNliAZb7iaI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qDe1qlEt54vYqvmVhD4YWGTrRwLrCeXIdSOxhnJRf2fuJ0hhIY2ZMRMQLFS/0GZrc qKi144Mur+5dYtV01TQZ19XwIDQX7gVdHcuayeXYr9Ola2Oop4p4XkVCnaN8ZLk4HY EviW7zVnouuk04FLrBr9tRhK1li9eLX9by0kcpQY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sergey Shtylyov , Wolfram Sang , Sasha Levin Subject: [PATCH 5.10 438/530] i2c: jz4780: add IRQ check Date: Wed, 12 May 2021 16:49:08 +0200 Message-Id: <20210512144834.169507330@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144819.664462530@linuxfoundation.org> References: <20210512144819.664462530@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: linux-kernel@vger.kernel.org From: Sergey Shtylyov [ Upstream commit c5e5f7a8d931fb4beba245bdbc94734175fda9de ] The driver neglects to check the result of platform_get_irq()'s call and blithely passes the negative error codes to devm_request_irq() (which takes *unsigned* IRQ #), causing it to fail with -EINVAL, overriding an original error code. Stop calling devm_request_irq() with invalid IRQ #s. Fixes: ba92222ed63a ("i2c: jz4780: Add i2c bus controller driver for Ingenic JZ4780") Signed-off-by: Sergey Shtylyov Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- drivers/i2c/busses/i2c-jz4780.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c index 2a946c207928..e181db3fd2cc 100644 --- a/drivers/i2c/busses/i2c-jz4780.c +++ b/drivers/i2c/busses/i2c-jz4780.c @@ -826,7 +826,10 @@ static int jz4780_i2c_probe(struct platform_device *pdev) jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, 0x0); - i2c->irq = platform_get_irq(pdev, 0); + ret = platform_get_irq(pdev, 0); + if (ret < 0) + goto err; + i2c->irq = ret; ret = devm_request_irq(&pdev->dev, i2c->irq, jz4780_i2c_irq, 0, dev_name(&pdev->dev), i2c); if (ret) -- 2.30.2