From patchwork Thu May 20 09:20:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 445701 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=-19.1 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 7B2D3C433B4 for ; Thu, 20 May 2021 10:00:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5984361CD8 for ; Thu, 20 May 2021 10:00:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235084AbhETKCD (ORCPT ); Thu, 20 May 2021 06:02:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:59182 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235342AbhETJ7y (ORCPT ); Thu, 20 May 2021 05:59:54 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2E6CE613CE; Thu, 20 May 2021 09:38:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621503537; bh=Eo71TZ2kJtI1W2NPQyoKBsunAnYppaZ7a2okXbh9e40=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=edDDSHoh5IrGYfmvK1Bo9bFgVep4VuL8Pgs52FLYm39FHetHsGEuQRuk+7EdP+GcS lk3w2/ZwP4mgw280QTQHwX4uqjDfHDVLAiB7drrR1FJTf3N9BAejDKc0YAQxENQVdI 84EMhnVEc4izrISD3crZ3mz8eNj4GdvJcw6gNM/E= 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 4.19 267/425] i2c: cadence: add IRQ check Date: Thu, 20 May 2021 11:20:36 +0200 Message-Id: <20210520092140.222619132@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092131.308959589@linuxfoundation.org> References: <20210520092131.308959589@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sergey Shtylyov [ Upstream commit 5581c2c5d02bc63a0edb53e061c8e97cd490646e ] 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: df8eb5691c48 ("i2c: Add driver for Cadence I2C controller") Signed-off-by: Sergey Shtylyov Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- drivers/i2c/busses/i2c-cadence.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-cadence.c b/drivers/i2c/busses/i2c-cadence.c index b13605718291..c5475bb4fae6 100644 --- a/drivers/i2c/busses/i2c-cadence.c +++ b/drivers/i2c/busses/i2c-cadence.c @@ -906,7 +906,10 @@ static int cdns_i2c_probe(struct platform_device *pdev) if (IS_ERR(id->membase)) return PTR_ERR(id->membase); - id->irq = platform_get_irq(pdev, 0); + ret = platform_get_irq(pdev, 0); + if (ret < 0) + return ret; + id->irq = ret; id->adap.owner = THIS_MODULE; id->adap.dev.of_node = pdev->dev.of_node;